{"gene":"YWHAZ","run_date":"2026-06-11T09:02:06","timeline":{"discoveries":[{"year":1992,"finding":"YWHAZ (KCIP-1/14-3-3 zeta) from sheep brain is an inhibitor of protein kinase C (PKC); however, it shows no inhibitory activity toward the catalytic fragment of PKC (protein kinase M), and has no effect on cAMP-dependent protein kinase, Ca2+/calmodulin-dependent protein kinase II, or casein kinase 2. Four isoforms of KCIP-1 are substrates for PKC phosphorylation in vitro. N-termini are acetylated and secondary structure is predominantly alpha-helical and amphipathic.","method":"In vitro kinase assays, reverse-phase HPLC isoform separation, direct protein sequencing, secondary structure prediction","journal":"European journal of biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Strong — direct in vitro enzymatic assays with multiple kinases and mutagenesis-level substrate analysis, replicated across isoforms","pmids":["1317796"],"is_preprint":false},{"year":1995,"finding":"14-3-3 zeta self-assembles into dimers via its amino-terminal sequences, while the carboxy-terminal ~100 amino acids mediate binding to c-Raf-1. 14-3-3 zeta is also an arachidonate-selective acyltransferase and putative phospholipase A2. Truncated 14-3-3 zeta that binds Raf but lacks full-length structure associates only with inactive Raf, indicating 14-3-3 participates in Raf activation. Overexpression of 14-3-3 zeta stabilizes recombinant Raf polypeptide levels.","method":"Deletion analysis, in vitro binding assays, two-hybrid analysis, COS cell co-expression, kinase activity assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple orthogonal methods (deletion mapping, two-hybrid, in vitro binding, in-cell co-expression), domain boundaries defined","pmids":["7559537"],"is_preprint":false},{"year":1995,"finding":"14-3-3 zeta differentially activates PKC isoforms: classical PKC isoforms show ~2-fold activation, PKC delta shows no significant increase, while PKC epsilon is highly activated with strong positive cooperativity (Hill coefficient ~6).","method":"In vitro PKC activity assay with purified proteins","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — direct in vitro enzymatic assay, single lab, single method","pmids":["7488074"],"is_preprint":false},{"year":1997,"finding":"14-3-3 zeta binds directly to the Raf-1 cysteine-rich domain (CRD, residues 139–184). Mutation of Raf-1 residues 143–145 impairs 14-3-3 binding but not Ras binding. Introduction of these mutations into full-length Raf-1 results in enhanced transforming activity, indicating that 14-3-3 interaction with the Raf-CRD negatively regulates Raf-1 function.","method":"GST pulldown, mutagenesis, transformation assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — direct binding assay with mutagenesis and functional rescue in cells, single lab with multiple orthogonal methods","pmids":["9261098"],"is_preprint":false},{"year":1997,"finding":"Drosophila 14-3-3 zeta (D14-3-3 zeta) is an essential component of the Ras/Raf/MAPK signaling pathway required for photoreceptor differentiation, acting upstream of Raf and downstream of Ras, as established by genetic epistasis with gain-of-function Raf and Ras alleles.","method":"Drosophila genetics, loss-of-function mutant analysis, gain-of-function epistasis rescue experiments, in situ expression and subcellular localization","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic epistasis in a multicellular organism with rescue experiments, defined pathway position","pmids":["9159395"],"is_preprint":false},{"year":1997,"finding":"14-3-3 zeta binds to the carboxyl half of mouse Wee1 kinase, as demonstrated by yeast two-hybrid screening, in vitro binding of recombinant proteins, and co-immunoprecipitation from COS-1 cells co-transfected with both proteins. Wee1 phosphorylated by Cdc2 kinase also binds 14-3-3 zeta. Both the entire kinase domain and a carboxyl-terminal sequence of Wee1 are required for binding.","method":"Yeast two-hybrid, in vitro binding assay, co-immunoprecipitation from transfected cells","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — yeast two-hybrid plus in vitro binding plus co-IP, single lab, multiple orthogonal methods","pmids":["9016762"],"is_preprint":false},{"year":1998,"finding":"Purified 14-3-3 zeta binds to discrete amino acid sequences within the cytoplasmic domain of the platelet GP Ib-IX-V complex, including the C-terminal GHSL sequence of GP Ibalpha, a central region of GP Ibalpha (Arg557–Gly575), and sequences in GP Ibbeta (Arg160–Arg175) and GP V (Lys529–Gly544). Phosphorylation of GP Ibbeta at Ser166 (a PKA site) enhances 14-3-3 zeta binding affinity ~8-fold. Soluble peptides based on these sequences partially displace 14-3-3 zeta from GP Ib-IX-V in platelet extracts by immunoprecipitation.","method":"Peptide immobilization binding assay, radiolabeled protein binding with competition, Ala-scanning mutagenesis, immunoprecipitation from platelet extracts","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple orthogonal methods (peptide array, radiolabeled binding, mutagenesis, cell extract co-IP), well-controlled","pmids":["9425086"],"is_preprint":false},{"year":1999,"finding":"14-3-3 zeta activates the ADP-ribosyltransferase activity of Pseudomonas aeruginosa ExoS; this activation requires basic residues lining the amphipathic groove of 14-3-3 zeta. Mutations of Val-176 that disrupt Raf-1 binding do not affect ExoS binding/activation, indicating ExoS uses distinct residues in the Raf-binding groove. Multiple 14-3-3 isoforms (beta, zeta, eta, sigma, tau) activate ExoS with similar efficiency, implicating a conserved structural element.","method":"Site-directed mutagenesis, in vitro ADP-ribosyltransferase activity assay, binding assays","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution of enzymatic activity combined with mutagenesis mapping, single lab","pmids":["10508420"],"is_preprint":false},{"year":2003,"finding":"14-3-3 zeta interacts with the actin-depolymerizing factor cofilin and its regulatory kinase LIMK1, as shown by yeast two-hybrid and GST pulldown. Deletion analysis identified consensus 14-3-3 binding sites on both cofilin and LIMK1. The C-terminal region of 14-3-3 zeta inhibits cofilin binding to actin in co-sedimentation assays. Upon co-transfection, 14-3-3 zeta immunoreactivity redistributes into LIMK1-induced actin aggregations in COS-7 cells.","method":"Yeast two-hybrid, GST pulldown, co-sedimentation assay, co-transfection and immunolocalization","journal":"The Biochemical journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple orthogonal methods (two-hybrid, pulldown, actin binding assay, cell imaging), multiple binding partners mapped","pmids":["12323073"],"is_preprint":false},{"year":2003,"finding":"14-3-3 zeta mediates integrin-induced activation of Cdc42 and Rac1 and subsequent cytoskeletal reorganization and cell spreading. In platelets, GP Ibalpha sequesters 14-3-3 zeta via its cytoplasmic domain, thereby regulating integrin-induced signaling; expression of 14-3-3 zeta restores Rho GTPase activation and spreading in cells expressing truncated GP Ibalpha lacking the 14-3-3 zeta binding site.","method":"CHO cell transfection with GP Ibalpha constructs, Cdc42/Rac activation assays, cytoskeletal reorganization assays, rescue by 14-3-3 zeta expression","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean loss-of-function and rescue experiment with defined domain requirements, specific GTPase activation readouts","pmids":["12810725"],"is_preprint":false},{"year":2003,"finding":"In neuronally differentiated PC12 cells and rodent brain, three PKC subclasses (classical, novel, and atypical) all interact with 14-3-3 zeta. The 14-3-3 zeta-associated PKC pool exhibits constitutive and autonomous Ca2+-independent activity. The C1 domain of PKC is involved in binding. The association of 14-3-3 zeta has distinct effects on different PKC classes: the classical PKC-alpha associated with 14-3-3 zeta shows no autonomous activity whereas non-classical PKC-epsilon does.","method":"Immunoprecipitation, co-immunoprecipitation, kinase activity assays, stable FLAG-tagged 14-3-3 zeta cell line","journal":"Journal of neurochemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP with activity measurement, single lab, multiple isoforms tested","pmids":["12485398"],"is_preprint":false},{"year":2004,"finding":"14-3-3 zeta and 14-3-3 sigma have distinct subcellular distributions due to differences in nuclear export rate: 14-3-3 sigma has a 1.7x higher nuclear export rate constant than 14-3-3 zeta, while nuclear import rates are equal. Both isoforms shuttle rapidly in and out of the nucleus via a Crm1-dependent, leptomycin B-sensitive mechanism. At steady state, 14-3-3 zeta is present at relatively higher levels in the nucleus than 14-3-3 sigma.","method":"FRAP of YFP-fusion proteins in multiple mammalian cell types, leptomycin B inhibition, isoform-specific antibody staining","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 2 / Strong — FRAP-based quantitative kinetics with pharmacological inhibition, multiple cell types, functional consequence for isoform-specific localization","pmids":["14996909"],"is_preprint":false},{"year":2008,"finding":"14-3-3 zeta down-regulates p53 in mammary epithelial cells by inducing hyperactivation of the PI3K/Akt pathway, which leads to phosphorylation and nuclear translocation of the MDM2 E3 ligase, resulting in increased p53 degradation. This mechanism confers resistance to anoikis and luminal filling in 3D acini cultures. Ectopic p53 expression restores luminal apoptosis in 14-3-3 zeta-overexpressing acini.","method":"3D culture model, western blotting, transgenic mouse mammary epithelial cells, ectopic p53 rescue, PI3K/Akt pathway analysis","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — mechanistic pathway defined with rescue experiment (ectopic p53), transgenic mouse model, and 3D culture functional readout","pmids":["18339856"],"is_preprint":false},{"year":2008,"finding":"SIRT2 knockdown induces expression of 14-3-3 zeta, which facilitates cytosolic sequestration of BAD, reducing mitochondrial BAD localization and conferring cytoprotection against anoxia-reoxygenation injury. Concurrent siRNA knockdown of both SIRT2 and 14-3-3 zeta abolishes the cytoprotective phenotype, placing 14-3-3 zeta downstream of SIRT2 in this pathway.","method":"siRNA knockdown (single and double), gene array, subcellular fractionation, H9c2 cell anoxia-reoxygenation model","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 2 / Moderate — epistasis by double siRNA knockdown with defined subcellular localization readout for BAD, two orthogonal methods","pmids":["18640115"],"is_preprint":false},{"year":2008,"finding":"Depletion of 14-3-3 zeta in mouse organotypic hippocampal cultures using siRNA induces ER stress proteins and granule cell death. Under ER stress (tunicamycin), 14-3-3 zeta accumulates in the ER-containing microsomal fraction. Kainic acid-induced damage is significantly increased in cultures with 14-3-3 zeta siRNA knockdown, demonstrating a neuroprotective role of 14-3-3 zeta in ER stress and seizure injury.","method":"siRNA knockdown, subcellular fractionation, organotypic hippocampal cultures, pharmacological ER stress induction","journal":"Journal of neurochemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean siRNA KD with functional phenotype and subcellular fractionation, single lab","pmids":["18466333"],"is_preprint":false},{"year":2010,"finding":"siRNA-mediated knockdown of YWHAZ sensitizes breast tumor cells to anthracyclines (doxorubicin), while overexpression induces anthracycline resistance. YWHAZ overexpression and amplification on chromosome 8q22 are associated with early disease recurrence despite adjuvant anthracycline treatment.","method":"siRNA knockdown, overexpression in cell lines, drug sensitivity assays, integrated genomics across independent cohorts","journal":"Nature medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — bidirectional functional manipulation (KD and OE) with drug sensitivity readout, validated in multiple independent clinical cohorts","pmids":["20098429"],"is_preprint":false},{"year":2011,"finding":"Fusicoccin-based cell-penetrating fluorescent probes form ternary complexes with 14-3-3 zeta proteins and phosphopeptide ligands, whereupon the probes site-specifically attach a fluorescent tag to the surface of 14-3-3 zeta. This demonstrates that fusicoccin stabilizes 14-3-3 zeta/phosphopeptide interactions.","method":"Chemical biology/affinity labeling, fluorescent probe-based ternary complex formation","journal":"Angewandte Chemie (International ed. in English)","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — direct biochemical reconstitution, single lab, single method","pmids":["22105970"],"is_preprint":false},{"year":2011,"finding":"14-3-3 zeta is identified as a binding protein for the antiepileptic drug lacosamide in rodent brain lysates, with adduction occurring at K120. Binding is stereospecific and depends on endogenous xanthine. Competition experiments confirm that lacosamide binds at or near the modification site on 14-3-3 zeta. Direct 14-3-3 zeta–xanthine interaction was confirmed by isothermal calorimetry.","method":"Affinity bait and chemical reporter strategy, mass spectrometry identification of adduction site, isothermal calorimetry, competition binding assays","journal":"Journal of the American Chemical Society","confidence":"High","confidence_rationale":"Tier 1 / Moderate — site-specific MS identification of binding residue, ITC thermodynamic confirmation, stereospecificity control, single lab with multiple orthogonal methods","pmids":["21692503"],"is_preprint":false},{"year":2012,"finding":"YWHAZ promotes epithelial-mesenchymal transition (EMT) and lung cancer metastasis through interaction with beta-catenin. YWHAZ binds beta-catenin (co-IP), reduces ubiquitinated beta-catenin by disassociating beta-catenin from beta-TrCP, and facilitates beta-catenin accumulation in cytosol and nucleus activating beta-catenin-mediated transcription. S552 phosphorylation of beta-catenin increases the beta-catenin/YWHAZ complex, promoting invasiveness.","method":"Co-immunoprecipitation, siRNA/shRNA knockdown, dominant-negative and dominant-positive beta-catenin mutant expression, invasion/migration assays, in vivo tumorigenesis","journal":"Molecular cancer research : MCR","confidence":"High","confidence_rationale":"Tier 2 / Strong — co-IP demonstrating physical interaction, mutagenesis of beta-catenin phosphosite, dominant-negative/positive rescue, multiple orthogonal methods in single study","pmids":["22912335"],"is_preprint":false},{"year":2013,"finding":"14-3-3 zeta knockdown sensitizes cells to stress-induced apoptosis and activates JNK/p38 signalling, and also enforces cell-cell contacts and expression of adhesion proteins, revealing isoform-specific oncogenic functions that restrain apoptosis and cell adhesion.","method":"siRNA knockdown, apoptosis assays, JNK/p38 signaling assays, adhesion protein expression analysis","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean siRNA knockdown with specific phenotypic readouts (apoptosis, JNK/p38 signaling, adhesion), single lab","pmids":["17704798"],"is_preprint":false},{"year":2013,"finding":"14-3-3 zeta binds to integrin alpha4 cytoplasmic tail in a canonical phospho-dependent manner (X-ray crystal structure obtained), but with additional contacts outside the consensus 14-3-3 binding motif essential for efficient interaction. Beta2 integrin short phospho-peptide is sufficient for high-affinity binding. Novel phosphorylation-independent interactions with integrin tails are also reported. The strongest interaction is with the beta1A integrin tail variant.","method":"X-ray crystallography of 14-3-3 zeta/alpha4-phosphopeptide complex, ITC, NMR, mutagenesis, biophysical characterization","journal":"Journal of molecular biology","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structure with mutagenesis validation and multiple biophysical methods, rigorous characterization of binding modes","pmids":["23763993"],"is_preprint":false},{"year":2014,"finding":"Guggulsterone treatment releases BAD from the inhibitory action of 14-3-3 zeta in HNSCC cells by activating protein phosphatase 2A (PP2A), which initiates the intrinsic mitochondrial apoptosis pathway (cytochrome c release, caspase activation, PARP cleavage). This demonstrates that 14-3-3 zeta sequesters BAD to prevent apoptosis and PP2A can disrupt this interaction.","method":"Co-immunoprecipitation, western blotting, apoptosis assays (annexin V, DNA fragmentation), caspase activity, cytochrome c fractionation","journal":"BMC cancer","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP showing BAD release, pathway activation confirmed by multiple markers, single lab","pmids":["21118500"],"is_preprint":false},{"year":2014,"finding":"14-3-3 zeta expression is transcriptionally regulated by ATF-1 and CREB binding to a functional Cyclic-AMP Response Element (CRE) in the proximal promoter of the predominant YWHAZ transcript variant (1c). Silencing ATF-1 markedly reduces two of five YWHAZ transcript variants. ATF-1 (and to a lesser extent CREB) binds the endogenous YWHAZ promoter especially under TNF-alpha stimulation.","method":"5' RACE, promoter identification, EMSA, ChIP, cell-based reporter assays, ATF-1 siRNA knockdown","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 / Strong — EMSA, ChIP, and functional reporter assays with KD validation, multiple orthogonal methods establishing transcriptional regulation","pmids":["24690670"],"is_preprint":false},{"year":2014,"finding":"BIS depletion induces cellular senescence in glioblastoma cells through a pathway involving decreased 14-3-3 zeta expression. 14-3-3 zeta depletion per se induces senescence, and ectopic 14-3-3 zeta expression blocks BIS-depletion-induced senescence. 14-3-3 zeta supports STAT3 solubility/activity, with its loss causing STAT3 accumulation in the insoluble fraction, decreased SKP2 transcription, and subsequent p27 accumulation leading to G1 arrest.","method":"siRNA knockdown, ectopic overexpression rescue, western blotting with fractionation, senescence assays","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — bidirectional manipulation with rescue, fractionation, multiple pathway markers, single lab","pmids":["25412315"],"is_preprint":false},{"year":2016,"finding":"14-3-3 zeta knockdown in trabecular meshwork (TM) cells decreases phosphorylation of myosin light chain (MLC) and cofilin, reduces stress fiber and focal adhesion formation, alters ECM mRNA composition, and inhibits TGF-beta1-induced cell contraction. Silencing of 14-3-3 zeta directly decreases total RhoA levels, placing 14-3-3 zeta upstream of RhoA in the actomyosin contraction pathway.","method":"siRNA knockdown, western blotting, immunofluorescence, collagen gel contraction assay, RhoA activation assay, RT-PCR","journal":"Investigative ophthalmology & visual science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — siRNA KD with multiple downstream readouts and specific pathway placement via RhoA measurement, single lab","pmids":["26906158"],"is_preprint":false},{"year":2016,"finding":"14-3-3 zeta participates in TLR3-TICAM-1 innate immune signaling. Knockdown of 14-3-3 zeta reduces type I interferon production, inflammatory cytokine production, IRF3 nuclear translocation, IκB phosphorylation, and inhibits TICAM-1 multimerization following TLR3 ligand stimulation, indicating 14-3-3 zeta promotes TICAM-1 signalosome formation.","method":"siRNA knockdown, TICAM-1 multimerization assay, IRF3 nuclear translocation assay, cytokine production measurement","journal":"Molecular immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — siRNA knockdown with multiple specific signaling readouts, TICAM-1 multimerization directly assessed, single lab","pmids":["27058640"],"is_preprint":false},{"year":2016,"finding":"Ywhaz gene knockout mice (14-3-3 zeta KO) exhibit improved oral glucose tolerance associated with elevated fasting GLP-1 levels. 14-3-3 zeta knockdown in GLUTag L cells elevates GLP-1 synthesis and release. Systemic GLP-1 receptor inhibition attenuates improved oral glucose tolerance in 14-3-3 zeta KO mice, demonstrating that 14-3-3 zeta regulates glucose homeostasis through a GLP-1-dependent mechanism in intestinal L cells.","method":"Ywhaz knockout mouse, oral and IP glucose tolerance tests, GLP-1 measurement, siRNA knockdown in GLUTag cells, GLP-1 receptor antagonist treatment","journal":"Endocrinology","confidence":"High","confidence_rationale":"Tier 2 / Strong — constitutive KO with pharmacological epistasis (GLP-1R antagonist rescue), validated in both in vivo and in vitro systems","pmids":["27167773"],"is_preprint":false},{"year":2019,"finding":"A YWHAZ variant S230W identified in patients with cardiofaciocutaneous (CFC) syndrome acts as a gain-of-function mutation in the RAS-ERK pathway. In Xenopus laevis, S230W induces severe embryonic defects, rescues dominant negative FGF receptor defects more efficiently than wild-type, enhances Raf-stimulated Erk phosphorylation, binds more Raf, and escapes phosphorylation by casein kinase 1a. Neither YWHAZ nor the variant promotes membrane recruitment of Raf.","method":"Xenopus embryo overexpression, dominant-negative FGF receptor rescue assay, ERK phosphorylation assay, co-immunoprecipitation for Raf binding, casein kinase 1a phosphorylation assay","journal":"Frontiers in physiology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple orthogonal methods (embryo functional assay, biochemical Raf binding, kinase phosphorylation, ERK signaling readout), vertebrate model organism","pmids":["31024343"],"is_preprint":false},{"year":2021,"finding":"YWHAZ interacts and colocalizes with DAAM1 in breast cancer cells. This YWHAZ-DAAM1 complex is essential for DAAM1-mediated microfilament remodeling and RhoA activation. miR-613 directly targets both YWHAZ and DAAM1, and blocking the YWHAZ-DAAM1 complex inhibits breast cancer cell migration.","method":"Co-immunoprecipitation, immunofluorescence colocalization, RhoA activation assay, miR-613 overexpression, cell migration assay","journal":"Cell death discovery","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP and colocalization with functional RhoA readout, single lab, two orthogonal methods","pmids":["34453038"],"is_preprint":false},{"year":2021,"finding":"PIM1 phosphorylates 14-3-3 zeta, which coordinates its interaction with androgen receptor (AR, also phosphorylated by PIM1 at S213). PIM1 phosphorylation of both AR and 14-3-3 zeta causes their extensive co-occupancy of chromatin at genes involved in cell migration and invasion, resulting in PIM1-dependent increase in expression of these genes. RIME identifies hnRNPK and TRIM28 as additional co-regulators interacting with both AR and 14-3-3 zeta in PIM1-overexpressing cells.","method":"Co-immunoprecipitation, ChIP-seq, RIME (rapid immunoprecipitation mass spectrometry of endogenous proteins), gene expression analysis","journal":"Communications biology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — direct phosphorylation-dependent co-IP, ChIP-seq genome-wide chromatin co-occupancy, and RIME for endogenous complex characterization, multiple orthogonal methods","pmids":["34697370"],"is_preprint":false},{"year":2021,"finding":"TMEM65 directly binds YWHAZ in the cytoplasm and inhibits ubiquitin-mediated degradation of YWHAZ, thereby stabilizing YWHAZ protein and activating the PI3K-Akt-mTOR signaling pathway to promote gastric cancer tumorigenesis. TMEM65 oncogenic effects are partly dependent on YWHAZ.","method":"Co-immunoprecipitation, western blotting, siRNA knockdown, xenograft model, protein stability assays","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP for direct binding, protein degradation assay, functional rescue, single lab","pmids":["38341472"],"is_preprint":false},{"year":2022,"finding":"YBX1 cooperates with RNA m6A reader IGF2BPs to stabilize YWHAZ mRNA in an m6A-dependent manner in CML cells. Loss of YBX1 decreases YWHAZ expression by accelerating YWHAZ mRNA decay. Restoration of YWHAZ rescues defects caused by YBX1 deficiency, establishing YWHAZ as a key downstream effector of YBX1 in CML leukemia stem cell survival.","method":"RNA immunoprecipitation, co-immunoprecipitation, RNA decay assay, RNA sequencing, CRISPR/Cas9 KO, CML mouse model","journal":"Cellular oncology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — RNA decay assay, RIP for m6A-reader interaction, CRISPR KO with YWHAZ rescue, mouse CML model, multiple orthogonal methods","pmids":["36512307"],"is_preprint":false},{"year":2022,"finding":"ywhaz deficiency in zebrafish alters neuronal activity and connectivity in the hindbrain. Adult ywhaz KO fish show decreased monoamine levels in the hindbrain and freezing behavior in response to novel stimuli. This behavioral phenotype is reversed by drugs targeting monoamine neurotransmission, suggesting 14-3-3 zeta regulates monoaminergic neurotransmission and neuronal connectivity.","method":"CRISPR/Cas9 knockout in zebrafish, whole-brain light-sheet imaging, monoamine quantification, pharmacological rescue, behavioral testing","journal":"Molecular psychiatry","confidence":"High","confidence_rationale":"Tier 2 / Strong — constitutive KO with whole-brain imaging, neurochemical measurement, and pharmacological rescue across multiple behavioral paradigms","pmids":["35501409"],"is_preprint":false},{"year":2022,"finding":"14-3-3 zeta is identified as a target protein of ginsenoside metabolite 20(S)-protopanaxadiol (PPD) in brain tissue. Co-crystal structure of 14-3-3 zeta–PPD shows main interactions with residues R56, R127, and Y128. Mutagenesis of any of these residues significantly decreases affinity between PPD and 14-3-3 zeta.","method":"Affinity chromatography, biolayer interferometry, isothermal titration calorimetry, X-ray co-crystallography, site-directed mutagenesis","journal":"Journal of ginseng research","confidence":"High","confidence_rationale":"Tier 1 / Strong — co-crystal structure plus mutagenesis validation plus ITC thermodynamics, multiple orthogonal methods establishing binding site","pmids":["34295206"],"is_preprint":false},{"year":2022,"finding":"14-3-3-zeta in islets mediates the effect of GLP-1 receptor agonist liraglutide on alpha cell proglucagon processing. The effect of beta cell GLP-1R signaling to activate alpha cell GLP-1 expression is mediated by a secreted protein factor regulated by 14-3-3-zeta. Alpha cell ablation blunts the ability of liraglutide to enhance glucose-stimulated insulin secretion.","method":"Mouse and human islet studies, alpha cell ablation model, liraglutide treatment, GLP-1 measurement, paracrine signaling assays","journal":"Science advances","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — alpha cell ablation epistasis, human and mouse islet validation, specific mechanistic pathway, single lab","pmids":["35867787"],"is_preprint":false},{"year":2018,"finding":"YWHAZ promotes osteoblastic differentiation by stabilizing RUNX2 protein. miR-451 blockade de-represses YWHAZ expression, which enhances RUNX2 protein stability and promotes osteoblastic differentiation and bone formation in vitro and in vivo. YWHAZ knockdown reduces RUNX2 stability and osteoblastic phenotype markers.","method":"miR-451 agomir/antagomir transfection, YWHAZ knockdown, western blotting for RUNX2 stability, OVX mouse in vivo model, bone morphometry","journal":"MedChemComm","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — bidirectional manipulation, protein stability assay, in vivo model, single lab","pmids":["30151091"],"is_preprint":false},{"year":2010,"finding":"14-3-3 zeta overexpression in mammary epithelial cells (MCF10A) in 3D culture causes luminal filling by conferring resistance to anoikis. 14-3-3 zeta overexpression begins at the atypical ductal hyperplasia stage of breast disease, establishing it as an early event in breast cancer progression.","method":"3D acini culture, MCF10A overexpression, anoikis assay, transgenic mouse mammary cells, histological staging of patient samples","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — 3D functional model with mechanistic pathway (PI3K/Akt/MDM2/p53) and transgenic mouse validation, multiple orthogonal methods; note this is the same paper as PMID 18339856","pmids":["18339856"],"is_preprint":false},{"year":2005,"finding":"In the diabetic rat retina, the direct interaction between 14-3-3 zeta and PKC is markedly decreased after 6 weeks of diabetes, while PKC activity is increased, suggesting that reduced 14-3-3 zeta levels contribute to PKC activation in diabetic retinopathy.","method":"Western blot, Northern blot, immunoprecipitation, double immunostaining, PKC activity assay","journal":"Diabetologia","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP combined with activity assay in disease tissue, correlative but mechanistically linked, single lab","pmids":["15909155"],"is_preprint":false},{"year":2010,"finding":"14-3-3 zeta negatively modulates TGF-beta1-mediated growth inhibition. Overexpression of 14-3-3 zeta increases the level of Smad3 phosphorylated at linker regions (which cannot mediate TGF-beta1 growth inhibitory response). Mutation of the 14-3-3 zeta phosphorylation sites in Smad3 reduces the 14-3-3 zeta-mediated inhibition of TGF-beta1-induced p15 promoter activity and cell cycle arrest.","method":"siRNA knockdown, overexpression, Smad3 phosphorylation analysis, promoter-reporter assay, Smad3 mutagenesis, cell cycle analysis","journal":"Molecules and cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Smad3 mutagenesis with reporter assay and cell cycle readout, single lab, multiple methods","pmids":["20082218"],"is_preprint":false},{"year":2013,"finding":"Transgenic overexpression of 14-3-3 zeta in mice selectively down-regulates unfolded protein response (UPR) pathway components in hippocampus (GRP78, GRP94, ATF4, ATF6, Xbp1 splicing) and potently protects against neuronal death caused by ER stress (tunicamycin) and prolonged seizures, demonstrating a direct role in neuronal survival through ER stress regulation.","method":"Transgenic mouse overexpression, tunicamycin ER stress model, status epilepticus model, histological cell death quantification, UPR protein expression analysis","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 / Strong — constitutive transgenic overexpression with two independent in vivo injury models and molecular pathway characterization","pmids":["23359526"],"is_preprint":false},{"year":2021,"finding":"G3BP1 interacts with YWHAZ to sequester Bax in the cytoplasm, thereby suppressing pro-apoptotic signaling and promoting chemoresistance in gastric cancer cells. G3BP1 knockdown increases sensitivity to chemotherapy drugs and elevates apoptosis; co-expression analysis identifies YWHAZ as the critical molecular intermediary.","method":"Co-immunoprecipitation, immunoprecipitation, immunofluorescence, siRNA knockdown, drug sensitivity assays","journal":"British journal of cancer","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP establishing G3BP1-YWHAZ interaction with Bax localization as functional readout, single lab","pmids":["32989225"],"is_preprint":false},{"year":2018,"finding":"YWHAZ binds TRIM21 (E3 ubiquitin ligase) as a novel interaction partner, and TRIM21's RING domain negatively regulates YWHAZ expression levels (i.e., TRIM21 promotes YWHAZ degradation). However, YWHAZ overexpression does not affect TRIM21-stimulated osteosarcoma cell proliferation (negative result for YWHAZ in this specific TRIM21 proliferation pathway).","method":"Co-immunoprecipitation with LC-MS/MS, bimolecular fluorescence complementation, TRIM21-ΔRING construct, MTT assay","journal":"Biomedical and environmental sciences : BES","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP confirmed by BiFC, RING domain deletion showing functional consequence for YWHAZ stability, single lab","pmids":["29673441"],"is_preprint":false},{"year":2012,"finding":"Proteomic pulldown of recombinant His-tagged 14-3-3 zeta from mouse hippocampus identifies 13 known 14-3-3 binding partners and 16 novel interacting proteins. 14-3-3 zeta distributes to cytoplasm, microsomal, nuclear, and mitochondrial fractions of the mouse hippocampus.","method":"His-tagged pulldown, LC-MS/MS, subcellular fractionation","journal":"International journal of physiology, pathophysiology and pharmacology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single pulldown/MS experiment, no functional follow-up on novel interactions, single lab","pmids":["22837806"],"is_preprint":false}],"current_model":"YWHAZ (14-3-3 zeta) is a dimeric scaffold/adaptor protein that binds phosphoserine/phosphothreonine motifs in hundreds of client proteins; it negatively regulates Raf-1 via direct interaction with the Raf cysteine-rich domain, participates in Raf activation in cells, activates PKC epsilon and classical PKC isoforms differentially in vitro, sequesters pro-apoptotic BAD in the cytoplasm (under SIRT2 and PP2A control), stabilizes beta-catenin by displacing it from beta-TrCP ubiquitination, down-regulates p53 through PI3K/Akt-dependent MDM2 nuclear translocation, interacts with integrin cytoplasmic tails in a phosphorylation-regulated manner to mediate Cdc42/Rac-dependent cytoskeletal reorganization, binds cofilin and LIMK1 to modulate actin dynamics, undergoes Crm1-dependent nuclear–cytoplasmic shuttling (with relatively higher nuclear residence than other isoforms), localizes to the ER microsomal fraction under stress to suppress the unfolded protein response, regulates GLP-1 production in intestinal L cells to control glucose homeostasis, modulates monoaminergic neurotransmission and neuronal connectivity, and has its transcription activated by ATF-1/CREB at a CRE promoter element, while its mRNA stability is maintained by the YBX1-IGF2BP m6A reader complex."},"narrative":{"mechanistic_narrative":"YWHAZ (14-3-3 zeta) is a dimeric phosphopeptide-binding scaffold that functions as an integrator of kinase signaling, cytoskeletal dynamics, apoptotic control, and stress responses across many cell types [PMID:7559537, PMID:23763993]. It self-assembles into dimers through its amino terminus while its carboxy-terminal half engages client proteins, including c-Raf-1, which it contacts directly at the Raf cysteine-rich domain; this interaction restrains Raf-1 transforming activity yet is required for productive Raf activation in cells and in the Drosophila Ras/Raf/MAPK pathway, placing 14-3-3 zeta upstream of Raf and downstream of Ras [PMID:7559537, PMID:9261098, PMID:9159395]. Binding to phosphorylated client motifs is the recurring theme: it associates with diverse substrates such as Wee1, the platelet GP Ib-IX-V complex, and integrin cytoplasmic tails, where phosphorylation enhances binding and a crystal structure resolves both canonical phosphomotif contacts and additional stabilizing surfaces [PMID:9016762, PMID:9425086, PMID:23763993]. Through integrin engagement it drives Cdc42/Rac1 activation, cytoskeletal reorganization, and cell spreading, and it further shapes actin dynamics by binding cofilin and LIMK1 and by sustaining RhoA-dependent actomyosin contraction [PMID:12323073, PMID:12810725, PMID:26906158]. 14-3-3 zeta suppresses apoptosis by sequestering pro-apoptotic BAD and Bax in the cytoplasm under SIRT2, PP2A, and G3BP1 control, and it down-regulates p53 by driving PI3K/Akt-dependent MDM2 nuclear translocation, conferring anoikis resistance and an early oncogenic role in breast cancer progression [PMID:18339856, PMID:18640115, PMID:21118500, PMID:32989225]. It stabilizes beta-catenin by displacing it from beta-TrCP to promote EMT and metastasis, and stabilizes additional clients including RUNX2 in osteoblast differentiation [PMID:22912335, PMID:30151091]. A cardiofaciocutaneous syndrome-associated S230W variant acts as a RAS-ERK gain-of-function mutation that escapes casein kinase 1a phosphorylation and binds more Raf [PMID:31024343]. Beyond signaling, 14-3-3 zeta shuttles between nucleus and cytoplasm via a Crm1-dependent mechanism, suppresses the unfolded protein response from the ER microsomal compartment to protect neurons, and regulates glucose homeostasis through GLP-1 production in intestinal L cells and islet alpha cells [PMID:14996909, PMID:18466333, PMID:27167773, PMID:23359526]. Its own expression is controlled transcriptionally by ATF-1/CREB at a CRE element and post-transcriptionally by m6A-dependent mRNA stabilization through the YBX1–IGF2BP reader complex [PMID:24690670, PMID:36512307].","teleology":[{"year":1992,"claim":"Establishing the founding biochemical activity: whether 14-3-3 zeta was a kinase regulator and how selective it was defined its functional class.","evidence":"In vitro kinase assays with multiple purified kinases, HPLC isoform separation and direct sequencing of sheep brain protein","pmids":["1317796"],"confidence":"High","gaps":["Did not identify physiological PKC substrates or in-cell relevance","Mechanism of inhibition versus the catalytic PKM fragment unresolved"]},{"year":1995,"claim":"Resolving the architecture: mapping that dimerization uses the N-terminus while Raf-1 binding uses the C-terminal ~100 residues explained how one protein both oligomerizes and scaffolds clients, and showed 14-3-3 zeta participates in Raf activation.","evidence":"Deletion analysis, two-hybrid, in vitro binding, and COS cell co-expression with Raf stability readout","pmids":["7559537"],"confidence":"High","gaps":["The reported acyltransferase/PLA2 activity not integrated with scaffold role","How truncated zeta distinguishes inactive from active Raf unclear"]},{"year":1995,"claim":"Testing PKC isoform selectivity addressed whether 14-3-3 zeta acts uniformly on kinases; strong cooperative activation of PKC epsilon versus modest classical-isoform effects indicated isoform-specific regulation.","evidence":"In vitro PKC activity assays with purified proteins","pmids":["7488074"],"confidence":"Medium","gaps":["Single-method in vitro assay without cellular confirmation","Structural basis of the high Hill coefficient unexplained"]},{"year":1997,"claim":"Defining the Raf binding site and its functional sign: the CRD interaction was shown to be inhibitory, clarifying the dual positive/negative relationship of 14-3-3 zeta to Raf.","evidence":"GST pulldown, Raf-1 CRD mutagenesis, and cell transformation assays","pmids":["9261098"],"confidence":"High","gaps":["How the same protein both inhibits and activates Raf in different contexts not reconciled","Phosphorylation dependence of CRD contact not addressed"]},{"year":1997,"claim":"Genetic epistasis in Drosophila placed 14-3-3 zeta firmly in the Ras/Raf/MAPK pathway in a living organism, moving beyond biochemistry to developmental requirement.","evidence":"Drosophila loss- and gain-of-function genetics with Raf/Ras epistasis and rescue","pmids":["9159395"],"confidence":"High","gaps":["Molecular target within the pathway in vivo not identified","Mammalian developmental requirement not tested here"]},{"year":1997,"claim":"Identifying Wee1 as a phospho-regulated client extended 14-3-3 zeta scaffolding into cell-cycle kinase regulation.","evidence":"Yeast two-hybrid, in vitro binding, and co-IP from transfected COS-1 cells","pmids":["9016762"],"confidence":"Medium","gaps":["Functional consequence of Wee1 binding for cell-cycle control not established","Endogenous interaction not demonstrated"]},{"year":1998,"claim":"Mapping discrete binding sites in the GP Ib-IX-V complex and showing PKA phosphorylation of GP Ibbeta enhances binding established phospho-regulated client engagement at the platelet membrane.","evidence":"Peptide binding assays, Ala-scanning mutagenesis, and immunoprecipitation from platelet extracts","pmids":["9425086"],"confidence":"High","gaps":["Downstream signaling consequence of the platelet interaction defined only later","Multiple binding sites of differing affinity not ranked physiologically"]},{"year":1999,"claim":"ExoS activation demonstrated that the amphipathic groove serves distinct clients via different residues, separating the Raf-binding determinant (Val-176) from the ExoS-binding surface.","evidence":"Site-directed mutagenesis and in vitro ADP-ribosyltransferase activity assays across isoforms","pmids":["10508420"],"confidence":"High","gaps":["Relevance to host defense in vivo not tested","Structural map of the two binding modes incomplete at the time"]},{"year":2003,"claim":"Linking 14-3-3 zeta to cofilin/LIMK1 and to integrin-driven Cdc42/Rac1 activation established its role in actin cytoskeletal reorganization and cell spreading, including a sequestration model in platelets.","evidence":"Two-hybrid, GST pulldown, actin co-sedimentation, cell imaging, and CHO rescue with GP Ibalpha constructs","pmids":["12323073","12810725"],"confidence":"High","gaps":["Phosphorylation control of the integrin tail interactions resolved structurally only later","In vivo cytoskeletal phenotype not assessed"]},{"year":2003,"claim":"Demonstrating that 14-3-3 zeta binds all three PKC subclasses via the C1 domain and confers Ca2+-independent autonomous activity selectively on PKC epsilon connected the early in vitro PKC findings to neuronal contexts.","evidence":"Reciprocal co-IP and kinase activity assays in differentiated PC12 cells and rodent brain","pmids":["12485398"],"confidence":"Medium","gaps":["Physiological output of autonomous PKC activity not defined","Single-lab characterization"]},{"year":2004,"claim":"Quantifying nuclear-cytoplasmic shuttling kinetics explained why 14-3-3 zeta has a higher steady-state nuclear presence than other isoforms, identifying a Crm1-dependent export mechanism.","evidence":"FRAP of YFP fusions in multiple cell types with leptomycin B inhibition","pmids":["14996909"],"confidence":"High","gaps":["Nuclear functions driving the higher residence not identified","Cargo coupling to shuttling not defined"]},{"year":2008,"claim":"Defining the PI3K/Akt/MDM2/p53 axis and BAD sequestration under SIRT2 control established how 14-3-3 zeta restrains apoptosis and confers anoikis resistance, linking it mechanistically to early breast cancer progression.","evidence":"3D acini cultures with ectopic p53 rescue, transgenic mouse mammary cells, double siRNA epistasis, and subcellular fractionation","pmids":["18339856","18640115","36"],"confidence":"High","gaps":["Direct phospho-clients within the PI3K/Akt branch not all mapped","Relative contribution of BAD versus p53 arms context-dependent"]},{"year":2008,"claim":"Identifying ER stress involvement showed that 14-3-3 zeta accumulates in the microsomal fraction and protects neurons from ER stress and excitotoxic injury, broadening its role beyond classical signaling.","evidence":"siRNA knockdown, subcellular fractionation, and organotypic hippocampal cultures with pharmacological ER stress and kainate injury","pmids":["18466333"],"confidence":"Medium","gaps":["Direct ER client proteins not identified","Mechanism of microsomal recruitment unknown"]},{"year":2010,"claim":"Connecting YWHAZ to anthracycline resistance and 8q22 amplification gave clinical weight to its anti-apoptotic oncogenic function across patient cohorts.","evidence":"Bidirectional siRNA/overexpression with drug sensitivity assays and integrated genomics in independent cohorts","pmids":["20098429"],"confidence":"High","gaps":["Resistance effector pathways downstream of YWHAZ not fully resolved","Causality versus correlation in amplification cohorts limited"]},{"year":2010,"claim":"Showing 14-3-3 zeta negatively modulates TGF-beta1 growth inhibition via Smad3 linker phosphorylation added a growth-control axis to its scaffold repertoire.","evidence":"Overexpression/knockdown, Smad3 phosphosite mutagenesis, p15 promoter reporter, and cell cycle analysis","pmids":["20082218"],"confidence":"Medium","gaps":["Whether 14-3-3 zeta directly recruits the relevant Smad3 kinase unclear","In vivo relevance not tested"]},{"year":2012,"claim":"Establishing the YWHAZ-beta-catenin interaction that blocks beta-TrCP-mediated ubiquitination explained how it stabilizes beta-catenin to drive EMT and metastasis.","evidence":"Co-IP, knockdown, beta-catenin phosphosite mutants, invasion/migration and in vivo tumorigenesis assays","pmids":["22912335"],"confidence":"High","gaps":["Stoichiometry of the displacement of beta-TrCP not quantified","Structural basis of S552-dependent complex formation undefined"]},{"year":2013,"claim":"Demonstrating that knockdown activates JNK/p38 and enforces cell-cell adhesion clarified isoform-specific oncogenic functions that restrain stress apoptosis and adhesion.","evidence":"siRNA knockdown with apoptosis, JNK/p38 signaling, and adhesion protein readouts","pmids":["17704798"],"confidence":"Medium","gaps":["Direct clients linking 14-3-3 zeta to JNK/p38 not identified","Single-lab phenotypic study"]},{"year":2013,"claim":"Transgenic overexpression confirmed in vivo that 14-3-3 zeta down-regulates UPR components and protects against ER stress and seizure-induced neuronal death.","evidence":"Transgenic mouse overexpression with tunicamycin and status epilepticus injury models and UPR pathway analysis","pmids":["23359526"],"confidence":"High","gaps":["Molecular target controlling UPR component levels not identified","Whether effect is cell-autonomous in neurons unresolved"]},{"year":2013,"claim":"Crystallography of the integrin alpha4 tail complex resolved both canonical phosphomotif and accessory contacts, defining the structural rules of phospho-dependent client engagement.","evidence":"X-ray crystallography, ITC, NMR, and mutagenesis across integrin tail variants","pmids":["23763993"],"confidence":"High","gaps":["Functional ranking of the multiple integrin tail interactions in cells incomplete","Phosphorylation-independent contacts mechanistically uncharacterized"]},{"year":2014,"claim":"Identifying ATF-1/CREB control at a CRE element defined how YWHAZ transcription is regulated and induced under TNF-alpha stimulation.","evidence":"5' RACE, EMSA, ChIP, reporter assays, and ATF-1 siRNA knockdown","pmids":["24690670"],"confidence":"High","gaps":["Upstream signals converging on the CRE not fully mapped","Transcript-variant-specific functions not resolved"]},{"year":2014,"claim":"Showing PP2A-mediated BAD release and STAT3/SKP2/p27 dependence linked 14-3-3 zeta to senescence control and the intrinsic mitochondrial apoptosis pathway.","evidence":"Co-IP, bidirectional manipulation with rescue, fractionation, and apoptosis/senescence markers in HNSCC and glioblastoma cells","pmids":["21118500","25412315"],"confidence":"Medium","gaps":["Direct STAT3 binding by 14-3-3 zeta not demonstrated","Single-lab pathways not independently confirmed"]},{"year":2016,"claim":"Placing 14-3-3 zeta upstream of RhoA in actomyosin contraction and within TLR3-TICAM-1 innate immune signaling extended its scaffold role to ECM remodeling and interferon responses.","evidence":"siRNA knockdown with RhoA activation, MLC/cofilin phosphorylation, contraction assays, and TICAM-1 multimerization/IRF3 translocation readouts","pmids":["26906158","27058640"],"confidence":"Medium","gaps":["Direct clients controlling RhoA levels and TICAM-1 assembly not identified","Single-lab mechanistic placements"]},{"year":2016,"claim":"Knockout mouse and L-cell studies established that 14-3-3 zeta regulates glucose homeostasis through a GLP-1-dependent mechanism, a metabolic role distinct from its signaling functions.","evidence":"Ywhaz knockout mice, glucose tolerance tests, GLP-1 measurement, GLUTag knockdown, and GLP-1R antagonist rescue","pmids":["27167773"],"confidence":"High","gaps":["Molecular clients controlling proglucagon processing not identified here","Tissue-specific contributions not dissected"]},{"year":2018,"claim":"Showing YWHAZ stabilizes RUNX2 to promote osteoblast differentiation added a protein-stabilization function relevant to bone formation.","evidence":"miR-451 manipulation, knockdown, RUNX2 stability blotting, and OVX mouse bone morphometry","pmids":["30151091"],"confidence":"Medium","gaps":["Whether YWHAZ binds RUNX2 directly not demonstrated","Mechanism of stabilization undefined"]},{"year":2018,"claim":"Identifying TRIM21 as an E3 ligase that promotes YWHAZ degradation began to define how YWHAZ protein levels are post-translationally controlled.","evidence":"Co-IP with LC-MS/MS, BiFC, RING-deletion constructs, and proliferation assays","pmids":["29673441"],"confidence":"Medium","gaps":["YWHAZ ubiquitination sites not mapped","No functional consequence of TRIM21-driven YWHAZ turnover in the tested proliferation pathway"]},{"year":2019,"claim":"The CFC syndrome S230W variant established a direct human disease link and revealed a gain-of-function mechanism in RAS-ERK signaling, distinguishing it from wild-type Raf regulation.","evidence":"Xenopus embryo overexpression, dominant-negative FGFR rescue, ERK phosphorylation, Raf co-IP, and casein kinase 1a phosphorylation assays","pmids":["31024343"],"confidence":"High","gaps":["Mammalian/patient cellular phenotype not directly characterized","How escape from CK1a phosphorylation increases Raf binding mechanistically unresolved"]},{"year":2021,"claim":"PIM1-dependent phosphorylation coupling YWHAZ to androgen receptor on chromatin defined a transcriptional co-regulatory function at migration/invasion genes with hnRNPK and TRIM28.","evidence":"Co-IP, ChIP-seq, RIME, and gene expression analysis in PIM1-overexpressing cells","pmids":["34697370"],"confidence":"High","gaps":["Whether chromatin association is direct or scaffold-mediated unclear","Generalizability beyond PIM1-high cells untested"]},{"year":2021,"claim":"Identifying DAAM1, G3BP1, and TMEM65 as YWHAZ partners connected it to microfilament/RhoA remodeling, Bax sequestration, and PI3K-Akt-mTOR-driven tumorigenesis with regulated YWHAZ stability.","evidence":"Co-IP, colocalization, RhoA and Bax localization readouts, protein stability assays, and xenograft models across cancer types","pmids":["34453038","32989225","38341472"],"confidence":"Medium","gaps":["Direct phospho-dependence of these interactions not all established","Single-lab interaction studies needing reciprocal validation"]},{"year":2022,"claim":"Establishing m6A-dependent YWHAZ mRNA stabilization by YBX1/IGF2BP defined the post-transcriptional control that sustains YWHAZ in leukemia stem cells.","evidence":"RIP, RNA decay assays, CRISPR KO with YWHAZ rescue, and a CML mouse model","pmids":["36512307"],"confidence":"High","gaps":["Specific m6A sites on YWHAZ mRNA not all mapped","Whether this regulation operates outside CML untested"]},{"year":2022,"claim":"Zebrafish knockout linked ywhaz to monoaminergic neurotransmission and neuronal connectivity, and islet studies tied it to alpha-cell proglucagon processing, deepening its neural and metabolic physiology.","evidence":"CRISPR zebrafish KO with whole-brain imaging, monoamine quantification and pharmacological rescue; mouse/human islet alpha-cell ablation with liraglutide","pmids":["35501409","35867787"],"confidence":"High","gaps":["Molecular clients mediating monoaminergic and paracrine effects not identified","Mechanistic continuity between neural and metabolic roles unestablished"]},{"year":2022,"claim":"Small-molecule co-crystal structures with PPD and prior probes mapped druggable surface residues and demonstrated stabilization of 14-3-3 zeta/phosphopeptide interactions.","evidence":"Co-crystallography, ITC, biolayer interferometry, mutagenesis, and fusicoccin/lacosamide chemical biology","pmids":["34295206","22105970","21692503"],"confidence":"High","gaps":["Therapeutic consequences of modulating these surfaces not established","Endogenous ligands at these sites largely uncharacterized"]},{"year":null,"claim":"How the hundreds of client interactions are selected, prioritized, and dynamically regulated to produce distinct cell-type-specific outcomes remains the central open question.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model linking phospho-client selection to context-specific physiological output","Reconciliation of opposing Raf inhibition versus activation roles unresolved","Direct versus scaffold-mediated nature of many reported interactions undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[1,3,5,6,20]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[3,7,12,18]},{"term_id":"GO:0140313","term_label":"molecular sequestering activity","supporting_discovery_ids":[13,21,40]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[13,18,40,42]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[11,18,29]},{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[14,39]},{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[42]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[3,4,12,18,27]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[13,21,40]},{"term_id":"R-HSA-8953897","term_label":"Cellular responses to stimuli","supporting_discovery_ids":[14,39]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[15,27,30,31]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[25]}],"complexes":[],"partners":["RAF1","BAD","CTNNB1","LIMK1","CFL1","WEE1","DAAM1","AR"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P63104","full_name":"14-3-3 protein zeta/delta","aliases":["Protein kinase C inhibitor protein 1","KCIP-1"],"length_aa":245,"mass_kda":27.7,"function":"Adapter protein implicated in the regulation of a large spectrum of both general and specialized signaling pathways (PubMed:14578935, PubMed:15071501, PubMed:15644438, PubMed:16376338, PubMed:16959763, PubMed:31024343, PubMed:9360956). Binds to a large number of partners, usually by recognition of a phosphoserine or phosphothreonine motif (PubMed:35662396). Binding generally results in the modulation of the activity of the binding partner (PubMed:35662396). Promotes cytosolic retention and inactivation of TFEB transcription factor by binding to phosphorylated TFEB (PubMed:35662396). Induces ARHGEF7 activity on RAC1 as well as lamellipodia and membrane ruffle formation (PubMed:16959763). In neurons, regulates spine maturation through the modulation of ARHGEF7 activity (By similarity)","subcellular_location":"Cytoplasm; Melanosome","url":"https://www.uniprot.org/uniprotkb/P63104/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/YWHAZ","classification":"Common Essential","n_dependent_lines":297,"n_total_lines":381,"dependency_fraction":0.7795275590551181},"opencell":{"profiled":true,"resolved_as":"","ensg_id":"ENSG00000164924","cell_line_id":"CID000467","localizations":[{"compartment":"centrosome","grade":3},{"compartment":"cytoplasmic","grade":3},{"compartment":"nucleoplasm","grade":3}],"interactors":[{"gene":"ACTR2","stoichiometry":10.0},{"gene":"YWHAB","stoichiometry":10.0},{"gene":"YWHAE","stoichiometry":10.0},{"gene":"YWHAG","stoichiometry":10.0},{"gene":"YWHAQ","stoichiometry":10.0},{"gene":"YWHAH","stoichiometry":4.0},{"gene":"APPL1","stoichiometry":0.2},{"gene":"ARAF","stoichiometry":0.2},{"gene":"ARL1","stoichiometry":0.2},{"gene":"ARL14EP","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/target/CID000467","total_profiled":1310},"omim":[{"mim_id":"619683","title":"B-BOX- AND SPRY DOMAIN-CONTAINING PROTEIN; BSPRY","url":"https://www.omim.org/entry/619683"},{"mim_id":"618692","title":"VESTIGIAL-LIKE FAMILY MEMBER 4; VGLL4","url":"https://www.omim.org/entry/618692"},{"mim_id":"618428","title":"POPOV-CHANG SYNDROME; POPCHAS","url":"https://www.omim.org/entry/618428"},{"mim_id":"617289","title":"FAMILY WITH SEQUENCE SIMILARITY 53, MEMBER B; FAM53B","url":"https://www.omim.org/entry/617289"},{"mim_id":"614734","title":"MICRO RNA 193B; MIR193B","url":"https://www.omim.org/entry/614734"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Cytosol","reliability":"Supported"},{"location":"Nucleoplasm","reliability":"Additional"},{"location":"Nucleoli rim","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/YWHAZ"},"hgnc":{"alias_symbol":["KCIP-1","14-3-3-zeta"],"prev_symbol":["YWHAD"]},"alphafold":{"accession":"P63104","domains":[{"cath_id":"1.20.190.20","chopping":"1-108","consensus_level":"medium","plddt":97.1415,"start":1,"end":108},{"cath_id":"1.20.190.20","chopping":"110-230","consensus_level":"medium","plddt":96.3021,"start":110,"end":230}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P63104","model_url":"https://alphafold.ebi.ac.uk/files/AF-P63104-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P63104-F1-predicted_aligned_error_v6.png","plddt_mean":93.94},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=YWHAZ","jax_strain_url":"https://www.jax.org/strain/search?query=YWHAZ"},"sequence":{"accession":"P63104","fasta_url":"https://rest.uniprot.org/uniprotkb/P63104.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P63104/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P63104"}},"corpus_meta":[{"pmid":"20098429","id":"PMC_20098429","title":"Amplification of LAPTM4B and YWHAZ contributes to chemotherapy resistance and recurrence of breast cancer.","date":"2010","source":"Nature medicine","url":"https://pubmed.ncbi.nlm.nih.gov/20098429","citation_count":291,"is_preprint":false},{"pmid":"1317796","id":"PMC_1317796","title":"Multiple isoforms of a protein kinase C inhibitor (KCIP-1/14-3-3) from sheep brain. Amino acid sequence of phosphorylated forms.","date":"1992","source":"European journal of biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/1317796","citation_count":129,"is_preprint":false},{"pmid":"9261098","id":"PMC_9261098","title":"14-3-3 zeta negatively regulates raf-1 activity by interactions with the Raf-1 cysteine-rich domain.","date":"1997","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/9261098","citation_count":120,"is_preprint":false},{"pmid":"9425086","id":"PMC_9425086","title":"Binding of purified 14-3-3 zeta signaling protein to discrete amino acid sequences within the cytoplasmic domain of the platelet membrane glycoprotein Ib-IX-V complex.","date":"1998","source":"Biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/9425086","citation_count":116,"is_preprint":false},{"pmid":"23422756","id":"PMC_23422756","title":"Overexpression of YWHAZ relates to tumor cell proliferation and malignant outcome of gastric 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Carcinoma.","date":"2020","source":"OncoTargets and therapy","url":"https://pubmed.ncbi.nlm.nih.gov/32547097","citation_count":14,"is_preprint":false},{"pmid":"17445990","id":"PMC_17445990","title":"Oxidative damage of 14-3-3 zeta and gamma isoforms in Alzheimer's disease and cerebral amyloid angiopathy.","date":"2007","source":"Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/17445990","citation_count":14,"is_preprint":false},{"pmid":"30151091","id":"PMC_30151091","title":"MicroRNA-451 blockade promotes osteoblastic differentiation and skeletal anabolic effects by promoting YWHAZ-mediated RUNX2 protein stabilization.","date":"2018","source":"MedChemComm","url":"https://pubmed.ncbi.nlm.nih.gov/30151091","citation_count":14,"is_preprint":false},{"pmid":"33442263","id":"PMC_33442263","title":"MiRNA-1225 Inhibits Osteosarcoma Tumor Growth and Progression by Targeting YWHAZ.","date":"2021","source":"OncoTargets and therapy","url":"https://pubmed.ncbi.nlm.nih.gov/33442263","citation_count":14,"is_preprint":false},{"pmid":"22669117","id":"PMC_22669117","title":"Roles of vimentin and 14-3-3 zeta/delta in the inhibitory effects of heparin on PC-3M cell proliferation and B16-F10-luc-G5 cells metastasis.","date":"2012","source":"Acta pharmacologica Sinica","url":"https://pubmed.ncbi.nlm.nih.gov/22669117","citation_count":14,"is_preprint":false},{"pmid":"35168653","id":"PMC_35168653","title":"CircCDK17 knockdown inhibits tumor progression and cell glycolysis by downregulaing YWHAZ expression through sponging miR-1294 in cervical cancer.","date":"2022","source":"Journal of ovarian research","url":"https://pubmed.ncbi.nlm.nih.gov/35168653","citation_count":13,"is_preprint":false},{"pmid":"22837806","id":"PMC_22837806","title":"Proteomic analysis of 14-3-3 zeta binding proteins in the mouse hippocampus.","date":"2012","source":"International journal of physiology, pathophysiology and pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/22837806","citation_count":13,"is_preprint":false},{"pmid":"30082525","id":"PMC_30082525","title":"MicroRNA-375 Suppresses the Tumor Aggressive Phenotypes of Clear Cell Renal Cell Carcinomas through Regulating YWHAZ.","date":"2018","source":"Chinese medical journal","url":"https://pubmed.ncbi.nlm.nih.gov/30082525","citation_count":13,"is_preprint":false},{"pmid":"35867787","id":"PMC_35867787","title":"14-3-3-zeta mediates GLP-1 receptor agonist action to alter α cell proglucagon processing.","date":"2022","source":"Science advances","url":"https://pubmed.ncbi.nlm.nih.gov/35867787","citation_count":12,"is_preprint":false},{"pmid":"30101359","id":"PMC_30101359","title":"Down-regulation of 14-3-3 zeta sensitizes human glioblastoma cells to apoptosis induction.","date":"2018","source":"Apoptosis : an international journal on programmed cell death","url":"https://pubmed.ncbi.nlm.nih.gov/30101359","citation_count":12,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":53073,"output_tokens":11539,"usd":0.166152,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":22607,"output_tokens":8719,"usd":0.165505,"stage2_stop_reason":"end_turn"},"total_usd":0.331657,"stage1_batch_id":"msgbatch_01UT1AahFPCAyn2uVweS7A9z","stage2_batch_id":"msgbatch_01HuKWtKNT4Pqj1bc8eEP5RV","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1992,\n      \"finding\": \"YWHAZ (KCIP-1/14-3-3 zeta) from sheep brain is an inhibitor of protein kinase C (PKC); however, it shows no inhibitory activity toward the catalytic fragment of PKC (protein kinase M), and has no effect on cAMP-dependent protein kinase, Ca2+/calmodulin-dependent protein kinase II, or casein kinase 2. Four isoforms of KCIP-1 are substrates for PKC phosphorylation in vitro. N-termini are acetylated and secondary structure is predominantly alpha-helical and amphipathic.\",\n      \"method\": \"In vitro kinase assays, reverse-phase HPLC isoform separation, direct protein sequencing, secondary structure prediction\",\n      \"journal\": \"European journal of biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — direct in vitro enzymatic assays with multiple kinases and mutagenesis-level substrate analysis, replicated across isoforms\",\n      \"pmids\": [\"1317796\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1995,\n      \"finding\": \"14-3-3 zeta self-assembles into dimers via its amino-terminal sequences, while the carboxy-terminal ~100 amino acids mediate binding to c-Raf-1. 14-3-3 zeta is also an arachidonate-selective acyltransferase and putative phospholipase A2. Truncated 14-3-3 zeta that binds Raf but lacks full-length structure associates only with inactive Raf, indicating 14-3-3 participates in Raf activation. Overexpression of 14-3-3 zeta stabilizes recombinant Raf polypeptide levels.\",\n      \"method\": \"Deletion analysis, in vitro binding assays, two-hybrid analysis, COS cell co-expression, kinase activity assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple orthogonal methods (deletion mapping, two-hybrid, in vitro binding, in-cell co-expression), domain boundaries defined\",\n      \"pmids\": [\"7559537\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1995,\n      \"finding\": \"14-3-3 zeta differentially activates PKC isoforms: classical PKC isoforms show ~2-fold activation, PKC delta shows no significant increase, while PKC epsilon is highly activated with strong positive cooperativity (Hill coefficient ~6).\",\n      \"method\": \"In vitro PKC activity assay with purified proteins\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — direct in vitro enzymatic assay, single lab, single method\",\n      \"pmids\": [\"7488074\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"14-3-3 zeta binds directly to the Raf-1 cysteine-rich domain (CRD, residues 139–184). Mutation of Raf-1 residues 143–145 impairs 14-3-3 binding but not Ras binding. Introduction of these mutations into full-length Raf-1 results in enhanced transforming activity, indicating that 14-3-3 interaction with the Raf-CRD negatively regulates Raf-1 function.\",\n      \"method\": \"GST pulldown, mutagenesis, transformation assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — direct binding assay with mutagenesis and functional rescue in cells, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"9261098\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"Drosophila 14-3-3 zeta (D14-3-3 zeta) is an essential component of the Ras/Raf/MAPK signaling pathway required for photoreceptor differentiation, acting upstream of Raf and downstream of Ras, as established by genetic epistasis with gain-of-function Raf and Ras alleles.\",\n      \"method\": \"Drosophila genetics, loss-of-function mutant analysis, gain-of-function epistasis rescue experiments, in situ expression and subcellular localization\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic epistasis in a multicellular organism with rescue experiments, defined pathway position\",\n      \"pmids\": [\"9159395\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"14-3-3 zeta binds to the carboxyl half of mouse Wee1 kinase, as demonstrated by yeast two-hybrid screening, in vitro binding of recombinant proteins, and co-immunoprecipitation from COS-1 cells co-transfected with both proteins. Wee1 phosphorylated by Cdc2 kinase also binds 14-3-3 zeta. Both the entire kinase domain and a carboxyl-terminal sequence of Wee1 are required for binding.\",\n      \"method\": \"Yeast two-hybrid, in vitro binding assay, co-immunoprecipitation from transfected cells\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — yeast two-hybrid plus in vitro binding plus co-IP, single lab, multiple orthogonal methods\",\n      \"pmids\": [\"9016762\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Purified 14-3-3 zeta binds to discrete amino acid sequences within the cytoplasmic domain of the platelet GP Ib-IX-V complex, including the C-terminal GHSL sequence of GP Ibalpha, a central region of GP Ibalpha (Arg557–Gly575), and sequences in GP Ibbeta (Arg160–Arg175) and GP V (Lys529–Gly544). Phosphorylation of GP Ibbeta at Ser166 (a PKA site) enhances 14-3-3 zeta binding affinity ~8-fold. Soluble peptides based on these sequences partially displace 14-3-3 zeta from GP Ib-IX-V in platelet extracts by immunoprecipitation.\",\n      \"method\": \"Peptide immobilization binding assay, radiolabeled protein binding with competition, Ala-scanning mutagenesis, immunoprecipitation from platelet extracts\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple orthogonal methods (peptide array, radiolabeled binding, mutagenesis, cell extract co-IP), well-controlled\",\n      \"pmids\": [\"9425086\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"14-3-3 zeta activates the ADP-ribosyltransferase activity of Pseudomonas aeruginosa ExoS; this activation requires basic residues lining the amphipathic groove of 14-3-3 zeta. Mutations of Val-176 that disrupt Raf-1 binding do not affect ExoS binding/activation, indicating ExoS uses distinct residues in the Raf-binding groove. Multiple 14-3-3 isoforms (beta, zeta, eta, sigma, tau) activate ExoS with similar efficiency, implicating a conserved structural element.\",\n      \"method\": \"Site-directed mutagenesis, in vitro ADP-ribosyltransferase activity assay, binding assays\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution of enzymatic activity combined with mutagenesis mapping, single lab\",\n      \"pmids\": [\"10508420\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"14-3-3 zeta interacts with the actin-depolymerizing factor cofilin and its regulatory kinase LIMK1, as shown by yeast two-hybrid and GST pulldown. Deletion analysis identified consensus 14-3-3 binding sites on both cofilin and LIMK1. The C-terminal region of 14-3-3 zeta inhibits cofilin binding to actin in co-sedimentation assays. Upon co-transfection, 14-3-3 zeta immunoreactivity redistributes into LIMK1-induced actin aggregations in COS-7 cells.\",\n      \"method\": \"Yeast two-hybrid, GST pulldown, co-sedimentation assay, co-transfection and immunolocalization\",\n      \"journal\": \"The Biochemical journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple orthogonal methods (two-hybrid, pulldown, actin binding assay, cell imaging), multiple binding partners mapped\",\n      \"pmids\": [\"12323073\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"14-3-3 zeta mediates integrin-induced activation of Cdc42 and Rac1 and subsequent cytoskeletal reorganization and cell spreading. In platelets, GP Ibalpha sequesters 14-3-3 zeta via its cytoplasmic domain, thereby regulating integrin-induced signaling; expression of 14-3-3 zeta restores Rho GTPase activation and spreading in cells expressing truncated GP Ibalpha lacking the 14-3-3 zeta binding site.\",\n      \"method\": \"CHO cell transfection with GP Ibalpha constructs, Cdc42/Rac activation assays, cytoskeletal reorganization assays, rescue by 14-3-3 zeta expression\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean loss-of-function and rescue experiment with defined domain requirements, specific GTPase activation readouts\",\n      \"pmids\": [\"12810725\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"In neuronally differentiated PC12 cells and rodent brain, three PKC subclasses (classical, novel, and atypical) all interact with 14-3-3 zeta. The 14-3-3 zeta-associated PKC pool exhibits constitutive and autonomous Ca2+-independent activity. The C1 domain of PKC is involved in binding. The association of 14-3-3 zeta has distinct effects on different PKC classes: the classical PKC-alpha associated with 14-3-3 zeta shows no autonomous activity whereas non-classical PKC-epsilon does.\",\n      \"method\": \"Immunoprecipitation, co-immunoprecipitation, kinase activity assays, stable FLAG-tagged 14-3-3 zeta cell line\",\n      \"journal\": \"Journal of neurochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP with activity measurement, single lab, multiple isoforms tested\",\n      \"pmids\": [\"12485398\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"14-3-3 zeta and 14-3-3 sigma have distinct subcellular distributions due to differences in nuclear export rate: 14-3-3 sigma has a 1.7x higher nuclear export rate constant than 14-3-3 zeta, while nuclear import rates are equal. Both isoforms shuttle rapidly in and out of the nucleus via a Crm1-dependent, leptomycin B-sensitive mechanism. At steady state, 14-3-3 zeta is present at relatively higher levels in the nucleus than 14-3-3 sigma.\",\n      \"method\": \"FRAP of YFP-fusion proteins in multiple mammalian cell types, leptomycin B inhibition, isoform-specific antibody staining\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — FRAP-based quantitative kinetics with pharmacological inhibition, multiple cell types, functional consequence for isoform-specific localization\",\n      \"pmids\": [\"14996909\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"14-3-3 zeta down-regulates p53 in mammary epithelial cells by inducing hyperactivation of the PI3K/Akt pathway, which leads to phosphorylation and nuclear translocation of the MDM2 E3 ligase, resulting in increased p53 degradation. This mechanism confers resistance to anoikis and luminal filling in 3D acini cultures. Ectopic p53 expression restores luminal apoptosis in 14-3-3 zeta-overexpressing acini.\",\n      \"method\": \"3D culture model, western blotting, transgenic mouse mammary epithelial cells, ectopic p53 rescue, PI3K/Akt pathway analysis\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mechanistic pathway defined with rescue experiment (ectopic p53), transgenic mouse model, and 3D culture functional readout\",\n      \"pmids\": [\"18339856\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"SIRT2 knockdown induces expression of 14-3-3 zeta, which facilitates cytosolic sequestration of BAD, reducing mitochondrial BAD localization and conferring cytoprotection against anoxia-reoxygenation injury. Concurrent siRNA knockdown of both SIRT2 and 14-3-3 zeta abolishes the cytoprotective phenotype, placing 14-3-3 zeta downstream of SIRT2 in this pathway.\",\n      \"method\": \"siRNA knockdown (single and double), gene array, subcellular fractionation, H9c2 cell anoxia-reoxygenation model\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — epistasis by double siRNA knockdown with defined subcellular localization readout for BAD, two orthogonal methods\",\n      \"pmids\": [\"18640115\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Depletion of 14-3-3 zeta in mouse organotypic hippocampal cultures using siRNA induces ER stress proteins and granule cell death. Under ER stress (tunicamycin), 14-3-3 zeta accumulates in the ER-containing microsomal fraction. Kainic acid-induced damage is significantly increased in cultures with 14-3-3 zeta siRNA knockdown, demonstrating a neuroprotective role of 14-3-3 zeta in ER stress and seizure injury.\",\n      \"method\": \"siRNA knockdown, subcellular fractionation, organotypic hippocampal cultures, pharmacological ER stress induction\",\n      \"journal\": \"Journal of neurochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean siRNA KD with functional phenotype and subcellular fractionation, single lab\",\n      \"pmids\": [\"18466333\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"siRNA-mediated knockdown of YWHAZ sensitizes breast tumor cells to anthracyclines (doxorubicin), while overexpression induces anthracycline resistance. YWHAZ overexpression and amplification on chromosome 8q22 are associated with early disease recurrence despite adjuvant anthracycline treatment.\",\n      \"method\": \"siRNA knockdown, overexpression in cell lines, drug sensitivity assays, integrated genomics across independent cohorts\",\n      \"journal\": \"Nature medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — bidirectional functional manipulation (KD and OE) with drug sensitivity readout, validated in multiple independent clinical cohorts\",\n      \"pmids\": [\"20098429\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Fusicoccin-based cell-penetrating fluorescent probes form ternary complexes with 14-3-3 zeta proteins and phosphopeptide ligands, whereupon the probes site-specifically attach a fluorescent tag to the surface of 14-3-3 zeta. This demonstrates that fusicoccin stabilizes 14-3-3 zeta/phosphopeptide interactions.\",\n      \"method\": \"Chemical biology/affinity labeling, fluorescent probe-based ternary complex formation\",\n      \"journal\": \"Angewandte Chemie (International ed. in English)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — direct biochemical reconstitution, single lab, single method\",\n      \"pmids\": [\"22105970\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"14-3-3 zeta is identified as a binding protein for the antiepileptic drug lacosamide in rodent brain lysates, with adduction occurring at K120. Binding is stereospecific and depends on endogenous xanthine. Competition experiments confirm that lacosamide binds at or near the modification site on 14-3-3 zeta. Direct 14-3-3 zeta–xanthine interaction was confirmed by isothermal calorimetry.\",\n      \"method\": \"Affinity bait and chemical reporter strategy, mass spectrometry identification of adduction site, isothermal calorimetry, competition binding assays\",\n      \"journal\": \"Journal of the American Chemical Society\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — site-specific MS identification of binding residue, ITC thermodynamic confirmation, stereospecificity control, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"21692503\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"YWHAZ promotes epithelial-mesenchymal transition (EMT) and lung cancer metastasis through interaction with beta-catenin. YWHAZ binds beta-catenin (co-IP), reduces ubiquitinated beta-catenin by disassociating beta-catenin from beta-TrCP, and facilitates beta-catenin accumulation in cytosol and nucleus activating beta-catenin-mediated transcription. S552 phosphorylation of beta-catenin increases the beta-catenin/YWHAZ complex, promoting invasiveness.\",\n      \"method\": \"Co-immunoprecipitation, siRNA/shRNA knockdown, dominant-negative and dominant-positive beta-catenin mutant expression, invasion/migration assays, in vivo tumorigenesis\",\n      \"journal\": \"Molecular cancer research : MCR\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — co-IP demonstrating physical interaction, mutagenesis of beta-catenin phosphosite, dominant-negative/positive rescue, multiple orthogonal methods in single study\",\n      \"pmids\": [\"22912335\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"14-3-3 zeta knockdown sensitizes cells to stress-induced apoptosis and activates JNK/p38 signalling, and also enforces cell-cell contacts and expression of adhesion proteins, revealing isoform-specific oncogenic functions that restrain apoptosis and cell adhesion.\",\n      \"method\": \"siRNA knockdown, apoptosis assays, JNK/p38 signaling assays, adhesion protein expression analysis\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean siRNA knockdown with specific phenotypic readouts (apoptosis, JNK/p38 signaling, adhesion), single lab\",\n      \"pmids\": [\"17704798\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"14-3-3 zeta binds to integrin alpha4 cytoplasmic tail in a canonical phospho-dependent manner (X-ray crystal structure obtained), but with additional contacts outside the consensus 14-3-3 binding motif essential for efficient interaction. Beta2 integrin short phospho-peptide is sufficient for high-affinity binding. Novel phosphorylation-independent interactions with integrin tails are also reported. The strongest interaction is with the beta1A integrin tail variant.\",\n      \"method\": \"X-ray crystallography of 14-3-3 zeta/alpha4-phosphopeptide complex, ITC, NMR, mutagenesis, biophysical characterization\",\n      \"journal\": \"Journal of molecular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structure with mutagenesis validation and multiple biophysical methods, rigorous characterization of binding modes\",\n      \"pmids\": [\"23763993\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Guggulsterone treatment releases BAD from the inhibitory action of 14-3-3 zeta in HNSCC cells by activating protein phosphatase 2A (PP2A), which initiates the intrinsic mitochondrial apoptosis pathway (cytochrome c release, caspase activation, PARP cleavage). This demonstrates that 14-3-3 zeta sequesters BAD to prevent apoptosis and PP2A can disrupt this interaction.\",\n      \"method\": \"Co-immunoprecipitation, western blotting, apoptosis assays (annexin V, DNA fragmentation), caspase activity, cytochrome c fractionation\",\n      \"journal\": \"BMC cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP showing BAD release, pathway activation confirmed by multiple markers, single lab\",\n      \"pmids\": [\"21118500\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"14-3-3 zeta expression is transcriptionally regulated by ATF-1 and CREB binding to a functional Cyclic-AMP Response Element (CRE) in the proximal promoter of the predominant YWHAZ transcript variant (1c). Silencing ATF-1 markedly reduces two of five YWHAZ transcript variants. ATF-1 (and to a lesser extent CREB) binds the endogenous YWHAZ promoter especially under TNF-alpha stimulation.\",\n      \"method\": \"5' RACE, promoter identification, EMSA, ChIP, cell-based reporter assays, ATF-1 siRNA knockdown\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — EMSA, ChIP, and functional reporter assays with KD validation, multiple orthogonal methods establishing transcriptional regulation\",\n      \"pmids\": [\"24690670\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"BIS depletion induces cellular senescence in glioblastoma cells through a pathway involving decreased 14-3-3 zeta expression. 14-3-3 zeta depletion per se induces senescence, and ectopic 14-3-3 zeta expression blocks BIS-depletion-induced senescence. 14-3-3 zeta supports STAT3 solubility/activity, with its loss causing STAT3 accumulation in the insoluble fraction, decreased SKP2 transcription, and subsequent p27 accumulation leading to G1 arrest.\",\n      \"method\": \"siRNA knockdown, ectopic overexpression rescue, western blotting with fractionation, senescence assays\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — bidirectional manipulation with rescue, fractionation, multiple pathway markers, single lab\",\n      \"pmids\": [\"25412315\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"14-3-3 zeta knockdown in trabecular meshwork (TM) cells decreases phosphorylation of myosin light chain (MLC) and cofilin, reduces stress fiber and focal adhesion formation, alters ECM mRNA composition, and inhibits TGF-beta1-induced cell contraction. Silencing of 14-3-3 zeta directly decreases total RhoA levels, placing 14-3-3 zeta upstream of RhoA in the actomyosin contraction pathway.\",\n      \"method\": \"siRNA knockdown, western blotting, immunofluorescence, collagen gel contraction assay, RhoA activation assay, RT-PCR\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — siRNA KD with multiple downstream readouts and specific pathway placement via RhoA measurement, single lab\",\n      \"pmids\": [\"26906158\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"14-3-3 zeta participates in TLR3-TICAM-1 innate immune signaling. Knockdown of 14-3-3 zeta reduces type I interferon production, inflammatory cytokine production, IRF3 nuclear translocation, IκB phosphorylation, and inhibits TICAM-1 multimerization following TLR3 ligand stimulation, indicating 14-3-3 zeta promotes TICAM-1 signalosome formation.\",\n      \"method\": \"siRNA knockdown, TICAM-1 multimerization assay, IRF3 nuclear translocation assay, cytokine production measurement\",\n      \"journal\": \"Molecular immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — siRNA knockdown with multiple specific signaling readouts, TICAM-1 multimerization directly assessed, single lab\",\n      \"pmids\": [\"27058640\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Ywhaz gene knockout mice (14-3-3 zeta KO) exhibit improved oral glucose tolerance associated with elevated fasting GLP-1 levels. 14-3-3 zeta knockdown in GLUTag L cells elevates GLP-1 synthesis and release. Systemic GLP-1 receptor inhibition attenuates improved oral glucose tolerance in 14-3-3 zeta KO mice, demonstrating that 14-3-3 zeta regulates glucose homeostasis through a GLP-1-dependent mechanism in intestinal L cells.\",\n      \"method\": \"Ywhaz knockout mouse, oral and IP glucose tolerance tests, GLP-1 measurement, siRNA knockdown in GLUTag cells, GLP-1 receptor antagonist treatment\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — constitutive KO with pharmacological epistasis (GLP-1R antagonist rescue), validated in both in vivo and in vitro systems\",\n      \"pmids\": [\"27167773\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"A YWHAZ variant S230W identified in patients with cardiofaciocutaneous (CFC) syndrome acts as a gain-of-function mutation in the RAS-ERK pathway. In Xenopus laevis, S230W induces severe embryonic defects, rescues dominant negative FGF receptor defects more efficiently than wild-type, enhances Raf-stimulated Erk phosphorylation, binds more Raf, and escapes phosphorylation by casein kinase 1a. Neither YWHAZ nor the variant promotes membrane recruitment of Raf.\",\n      \"method\": \"Xenopus embryo overexpression, dominant-negative FGF receptor rescue assay, ERK phosphorylation assay, co-immunoprecipitation for Raf binding, casein kinase 1a phosphorylation assay\",\n      \"journal\": \"Frontiers in physiology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple orthogonal methods (embryo functional assay, biochemical Raf binding, kinase phosphorylation, ERK signaling readout), vertebrate model organism\",\n      \"pmids\": [\"31024343\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"YWHAZ interacts and colocalizes with DAAM1 in breast cancer cells. This YWHAZ-DAAM1 complex is essential for DAAM1-mediated microfilament remodeling and RhoA activation. miR-613 directly targets both YWHAZ and DAAM1, and blocking the YWHAZ-DAAM1 complex inhibits breast cancer cell migration.\",\n      \"method\": \"Co-immunoprecipitation, immunofluorescence colocalization, RhoA activation assay, miR-613 overexpression, cell migration assay\",\n      \"journal\": \"Cell death discovery\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP and colocalization with functional RhoA readout, single lab, two orthogonal methods\",\n      \"pmids\": [\"34453038\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"PIM1 phosphorylates 14-3-3 zeta, which coordinates its interaction with androgen receptor (AR, also phosphorylated by PIM1 at S213). PIM1 phosphorylation of both AR and 14-3-3 zeta causes their extensive co-occupancy of chromatin at genes involved in cell migration and invasion, resulting in PIM1-dependent increase in expression of these genes. RIME identifies hnRNPK and TRIM28 as additional co-regulators interacting with both AR and 14-3-3 zeta in PIM1-overexpressing cells.\",\n      \"method\": \"Co-immunoprecipitation, ChIP-seq, RIME (rapid immunoprecipitation mass spectrometry of endogenous proteins), gene expression analysis\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — direct phosphorylation-dependent co-IP, ChIP-seq genome-wide chromatin co-occupancy, and RIME for endogenous complex characterization, multiple orthogonal methods\",\n      \"pmids\": [\"34697370\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TMEM65 directly binds YWHAZ in the cytoplasm and inhibits ubiquitin-mediated degradation of YWHAZ, thereby stabilizing YWHAZ protein and activating the PI3K-Akt-mTOR signaling pathway to promote gastric cancer tumorigenesis. TMEM65 oncogenic effects are partly dependent on YWHAZ.\",\n      \"method\": \"Co-immunoprecipitation, western blotting, siRNA knockdown, xenograft model, protein stability assays\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP for direct binding, protein degradation assay, functional rescue, single lab\",\n      \"pmids\": [\"38341472\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"YBX1 cooperates with RNA m6A reader IGF2BPs to stabilize YWHAZ mRNA in an m6A-dependent manner in CML cells. Loss of YBX1 decreases YWHAZ expression by accelerating YWHAZ mRNA decay. Restoration of YWHAZ rescues defects caused by YBX1 deficiency, establishing YWHAZ as a key downstream effector of YBX1 in CML leukemia stem cell survival.\",\n      \"method\": \"RNA immunoprecipitation, co-immunoprecipitation, RNA decay assay, RNA sequencing, CRISPR/Cas9 KO, CML mouse model\",\n      \"journal\": \"Cellular oncology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — RNA decay assay, RIP for m6A-reader interaction, CRISPR KO with YWHAZ rescue, mouse CML model, multiple orthogonal methods\",\n      \"pmids\": [\"36512307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ywhaz deficiency in zebrafish alters neuronal activity and connectivity in the hindbrain. Adult ywhaz KO fish show decreased monoamine levels in the hindbrain and freezing behavior in response to novel stimuli. This behavioral phenotype is reversed by drugs targeting monoamine neurotransmission, suggesting 14-3-3 zeta regulates monoaminergic neurotransmission and neuronal connectivity.\",\n      \"method\": \"CRISPR/Cas9 knockout in zebrafish, whole-brain light-sheet imaging, monoamine quantification, pharmacological rescue, behavioral testing\",\n      \"journal\": \"Molecular psychiatry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — constitutive KO with whole-brain imaging, neurochemical measurement, and pharmacological rescue across multiple behavioral paradigms\",\n      \"pmids\": [\"35501409\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"14-3-3 zeta is identified as a target protein of ginsenoside metabolite 20(S)-protopanaxadiol (PPD) in brain tissue. Co-crystal structure of 14-3-3 zeta–PPD shows main interactions with residues R56, R127, and Y128. Mutagenesis of any of these residues significantly decreases affinity between PPD and 14-3-3 zeta.\",\n      \"method\": \"Affinity chromatography, biolayer interferometry, isothermal titration calorimetry, X-ray co-crystallography, site-directed mutagenesis\",\n      \"journal\": \"Journal of ginseng research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — co-crystal structure plus mutagenesis validation plus ITC thermodynamics, multiple orthogonal methods establishing binding site\",\n      \"pmids\": [\"34295206\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"14-3-3-zeta in islets mediates the effect of GLP-1 receptor agonist liraglutide on alpha cell proglucagon processing. The effect of beta cell GLP-1R signaling to activate alpha cell GLP-1 expression is mediated by a secreted protein factor regulated by 14-3-3-zeta. Alpha cell ablation blunts the ability of liraglutide to enhance glucose-stimulated insulin secretion.\",\n      \"method\": \"Mouse and human islet studies, alpha cell ablation model, liraglutide treatment, GLP-1 measurement, paracrine signaling assays\",\n      \"journal\": \"Science advances\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — alpha cell ablation epistasis, human and mouse islet validation, specific mechanistic pathway, single lab\",\n      \"pmids\": [\"35867787\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"YWHAZ promotes osteoblastic differentiation by stabilizing RUNX2 protein. miR-451 blockade de-represses YWHAZ expression, which enhances RUNX2 protein stability and promotes osteoblastic differentiation and bone formation in vitro and in vivo. YWHAZ knockdown reduces RUNX2 stability and osteoblastic phenotype markers.\",\n      \"method\": \"miR-451 agomir/antagomir transfection, YWHAZ knockdown, western blotting for RUNX2 stability, OVX mouse in vivo model, bone morphometry\",\n      \"journal\": \"MedChemComm\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — bidirectional manipulation, protein stability assay, in vivo model, single lab\",\n      \"pmids\": [\"30151091\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"14-3-3 zeta overexpression in mammary epithelial cells (MCF10A) in 3D culture causes luminal filling by conferring resistance to anoikis. 14-3-3 zeta overexpression begins at the atypical ductal hyperplasia stage of breast disease, establishing it as an early event in breast cancer progression.\",\n      \"method\": \"3D acini culture, MCF10A overexpression, anoikis assay, transgenic mouse mammary cells, histological staging of patient samples\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — 3D functional model with mechanistic pathway (PI3K/Akt/MDM2/p53) and transgenic mouse validation, multiple orthogonal methods; note this is the same paper as PMID 18339856\",\n      \"pmids\": [\"18339856\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"In the diabetic rat retina, the direct interaction between 14-3-3 zeta and PKC is markedly decreased after 6 weeks of diabetes, while PKC activity is increased, suggesting that reduced 14-3-3 zeta levels contribute to PKC activation in diabetic retinopathy.\",\n      \"method\": \"Western blot, Northern blot, immunoprecipitation, double immunostaining, PKC activity assay\",\n      \"journal\": \"Diabetologia\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP combined with activity assay in disease tissue, correlative but mechanistically linked, single lab\",\n      \"pmids\": [\"15909155\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"14-3-3 zeta negatively modulates TGF-beta1-mediated growth inhibition. Overexpression of 14-3-3 zeta increases the level of Smad3 phosphorylated at linker regions (which cannot mediate TGF-beta1 growth inhibitory response). Mutation of the 14-3-3 zeta phosphorylation sites in Smad3 reduces the 14-3-3 zeta-mediated inhibition of TGF-beta1-induced p15 promoter activity and cell cycle arrest.\",\n      \"method\": \"siRNA knockdown, overexpression, Smad3 phosphorylation analysis, promoter-reporter assay, Smad3 mutagenesis, cell cycle analysis\",\n      \"journal\": \"Molecules and cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Smad3 mutagenesis with reporter assay and cell cycle readout, single lab, multiple methods\",\n      \"pmids\": [\"20082218\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Transgenic overexpression of 14-3-3 zeta in mice selectively down-regulates unfolded protein response (UPR) pathway components in hippocampus (GRP78, GRP94, ATF4, ATF6, Xbp1 splicing) and potently protects against neuronal death caused by ER stress (tunicamycin) and prolonged seizures, demonstrating a direct role in neuronal survival through ER stress regulation.\",\n      \"method\": \"Transgenic mouse overexpression, tunicamycin ER stress model, status epilepticus model, histological cell death quantification, UPR protein expression analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — constitutive transgenic overexpression with two independent in vivo injury models and molecular pathway characterization\",\n      \"pmids\": [\"23359526\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"G3BP1 interacts with YWHAZ to sequester Bax in the cytoplasm, thereby suppressing pro-apoptotic signaling and promoting chemoresistance in gastric cancer cells. G3BP1 knockdown increases sensitivity to chemotherapy drugs and elevates apoptosis; co-expression analysis identifies YWHAZ as the critical molecular intermediary.\",\n      \"method\": \"Co-immunoprecipitation, immunoprecipitation, immunofluorescence, siRNA knockdown, drug sensitivity assays\",\n      \"journal\": \"British journal of cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP establishing G3BP1-YWHAZ interaction with Bax localization as functional readout, single lab\",\n      \"pmids\": [\"32989225\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"YWHAZ binds TRIM21 (E3 ubiquitin ligase) as a novel interaction partner, and TRIM21's RING domain negatively regulates YWHAZ expression levels (i.e., TRIM21 promotes YWHAZ degradation). However, YWHAZ overexpression does not affect TRIM21-stimulated osteosarcoma cell proliferation (negative result for YWHAZ in this specific TRIM21 proliferation pathway).\",\n      \"method\": \"Co-immunoprecipitation with LC-MS/MS, bimolecular fluorescence complementation, TRIM21-ΔRING construct, MTT assay\",\n      \"journal\": \"Biomedical and environmental sciences : BES\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP confirmed by BiFC, RING domain deletion showing functional consequence for YWHAZ stability, single lab\",\n      \"pmids\": [\"29673441\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Proteomic pulldown of recombinant His-tagged 14-3-3 zeta from mouse hippocampus identifies 13 known 14-3-3 binding partners and 16 novel interacting proteins. 14-3-3 zeta distributes to cytoplasm, microsomal, nuclear, and mitochondrial fractions of the mouse hippocampus.\",\n      \"method\": \"His-tagged pulldown, LC-MS/MS, subcellular fractionation\",\n      \"journal\": \"International journal of physiology, pathophysiology and pharmacology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single pulldown/MS experiment, no functional follow-up on novel interactions, single lab\",\n      \"pmids\": [\"22837806\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"YWHAZ (14-3-3 zeta) is a dimeric scaffold/adaptor protein that binds phosphoserine/phosphothreonine motifs in hundreds of client proteins; it negatively regulates Raf-1 via direct interaction with the Raf cysteine-rich domain, participates in Raf activation in cells, activates PKC epsilon and classical PKC isoforms differentially in vitro, sequesters pro-apoptotic BAD in the cytoplasm (under SIRT2 and PP2A control), stabilizes beta-catenin by displacing it from beta-TrCP ubiquitination, down-regulates p53 through PI3K/Akt-dependent MDM2 nuclear translocation, interacts with integrin cytoplasmic tails in a phosphorylation-regulated manner to mediate Cdc42/Rac-dependent cytoskeletal reorganization, binds cofilin and LIMK1 to modulate actin dynamics, undergoes Crm1-dependent nuclear–cytoplasmic shuttling (with relatively higher nuclear residence than other isoforms), localizes to the ER microsomal fraction under stress to suppress the unfolded protein response, regulates GLP-1 production in intestinal L cells to control glucose homeostasis, modulates monoaminergic neurotransmission and neuronal connectivity, and has its transcription activated by ATF-1/CREB at a CRE promoter element, while its mRNA stability is maintained by the YBX1-IGF2BP m6A reader complex.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"YWHAZ (14-3-3 zeta) is a dimeric phosphopeptide-binding scaffold that functions as an integrator of kinase signaling, cytoskeletal dynamics, apoptotic control, and stress responses across many cell types [#1, #20]. It self-assembles into dimers through its amino terminus while its carboxy-terminal half engages client proteins, including c-Raf-1, which it contacts directly at the Raf cysteine-rich domain; this interaction restrains Raf-1 transforming activity yet is required for productive Raf activation in cells and in the Drosophila Ras/Raf/MAPK pathway, placing 14-3-3 zeta upstream of Raf and downstream of Ras [#1, #3, #4]. Binding to phosphorylated client motifs is the recurring theme: it associates with diverse substrates such as Wee1, the platelet GP Ib-IX-V complex, and integrin cytoplasmic tails, where phosphorylation enhances binding and a crystal structure resolves both canonical phosphomotif contacts and additional stabilizing surfaces [#5, #6, #20]. Through integrin engagement it drives Cdc42/Rac1 activation, cytoskeletal reorganization, and cell spreading, and it further shapes actin dynamics by binding cofilin and LIMK1 and by sustaining RhoA-dependent actomyosin contraction [#8, #9, #24]. 14-3-3 zeta suppresses apoptosis by sequestering pro-apoptotic BAD and Bax in the cytoplasm under SIRT2, PP2A, and G3BP1 control, and it down-regulates p53 by driving PI3K/Akt-dependent MDM2 nuclear translocation, conferring anoikis resistance and an early oncogenic role in breast cancer progression [#12, #13, #21, #36, #40]. It stabilizes beta-catenin by displacing it from beta-TrCP to promote EMT and metastasis, and stabilizes additional clients including RUNX2 in osteoblast differentiation [#18, #35]. A cardiofaciocutaneous syndrome-associated S230W variant acts as a RAS-ERK gain-of-function mutation that escapes casein kinase 1a phosphorylation and binds more Raf [#27]. Beyond signaling, 14-3-3 zeta shuttles between nucleus and cytoplasm via a Crm1-dependent mechanism, suppresses the unfolded protein response from the ER microsomal compartment to protect neurons, and regulates glucose homeostasis through GLP-1 production in intestinal L cells and islet alpha cells [#11, #14, #26, #39]. Its own expression is controlled transcriptionally by ATF-1/CREB at a CRE element and post-transcriptionally by m6A-dependent mRNA stabilization through the YBX1–IGF2BP reader complex [#22, #31].\",\n  \"teleology\": [\n    {\n      \"year\": 1992,\n      \"claim\": \"Establishing the founding biochemical activity: whether 14-3-3 zeta was a kinase regulator and how selective it was defined its functional class.\",\n      \"evidence\": \"In vitro kinase assays with multiple purified kinases, HPLC isoform separation and direct sequencing of sheep brain protein\",\n      \"pmids\": [\"1317796\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not identify physiological PKC substrates or in-cell relevance\", \"Mechanism of inhibition versus the catalytic PKM fragment unresolved\"]\n    },\n    {\n      \"year\": 1995,\n      \"claim\": \"Resolving the architecture: mapping that dimerization uses the N-terminus while Raf-1 binding uses the C-terminal ~100 residues explained how one protein both oligomerizes and scaffolds clients, and showed 14-3-3 zeta participates in Raf activation.\",\n      \"evidence\": \"Deletion analysis, two-hybrid, in vitro binding, and COS cell co-expression with Raf stability readout\",\n      \"pmids\": [\"7559537\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"The reported acyltransferase/PLA2 activity not integrated with scaffold role\", \"How truncated zeta distinguishes inactive from active Raf unclear\"]\n    },\n    {\n      \"year\": 1995,\n      \"claim\": \"Testing PKC isoform selectivity addressed whether 14-3-3 zeta acts uniformly on kinases; strong cooperative activation of PKC epsilon versus modest classical-isoform effects indicated isoform-specific regulation.\",\n      \"evidence\": \"In vitro PKC activity assays with purified proteins\",\n      \"pmids\": [\"7488074\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single-method in vitro assay without cellular confirmation\", \"Structural basis of the high Hill coefficient unexplained\"]\n    },\n    {\n      \"year\": 1997,\n      \"claim\": \"Defining the Raf binding site and its functional sign: the CRD interaction was shown to be inhibitory, clarifying the dual positive/negative relationship of 14-3-3 zeta to Raf.\",\n      \"evidence\": \"GST pulldown, Raf-1 CRD mutagenesis, and cell transformation assays\",\n      \"pmids\": [\"9261098\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How the same protein both inhibits and activates Raf in different contexts not reconciled\", \"Phosphorylation dependence of CRD contact not addressed\"]\n    },\n    {\n      \"year\": 1997,\n      \"claim\": \"Genetic epistasis in Drosophila placed 14-3-3 zeta firmly in the Ras/Raf/MAPK pathway in a living organism, moving beyond biochemistry to developmental requirement.\",\n      \"evidence\": \"Drosophila loss- and gain-of-function genetics with Raf/Ras epistasis and rescue\",\n      \"pmids\": [\"9159395\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular target within the pathway in vivo not identified\", \"Mammalian developmental requirement not tested here\"]\n    },\n    {\n      \"year\": 1997,\n      \"claim\": \"Identifying Wee1 as a phospho-regulated client extended 14-3-3 zeta scaffolding into cell-cycle kinase regulation.\",\n      \"evidence\": \"Yeast two-hybrid, in vitro binding, and co-IP from transfected COS-1 cells\",\n      \"pmids\": [\"9016762\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequence of Wee1 binding for cell-cycle control not established\", \"Endogenous interaction not demonstrated\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Mapping discrete binding sites in the GP Ib-IX-V complex and showing PKA phosphorylation of GP Ibbeta enhances binding established phospho-regulated client engagement at the platelet membrane.\",\n      \"evidence\": \"Peptide binding assays, Ala-scanning mutagenesis, and immunoprecipitation from platelet extracts\",\n      \"pmids\": [\"9425086\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream signaling consequence of the platelet interaction defined only later\", \"Multiple binding sites of differing affinity not ranked physiologically\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"ExoS activation demonstrated that the amphipathic groove serves distinct clients via different residues, separating the Raf-binding determinant (Val-176) from the ExoS-binding surface.\",\n      \"evidence\": \"Site-directed mutagenesis and in vitro ADP-ribosyltransferase activity assays across isoforms\",\n      \"pmids\": [\"10508420\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relevance to host defense in vivo not tested\", \"Structural map of the two binding modes incomplete at the time\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Linking 14-3-3 zeta to cofilin/LIMK1 and to integrin-driven Cdc42/Rac1 activation established its role in actin cytoskeletal reorganization and cell spreading, including a sequestration model in platelets.\",\n      \"evidence\": \"Two-hybrid, GST pulldown, actin co-sedimentation, cell imaging, and CHO rescue with GP Ibalpha constructs\",\n      \"pmids\": [\"12323073\", \"12810725\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Phosphorylation control of the integrin tail interactions resolved structurally only later\", \"In vivo cytoskeletal phenotype not assessed\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Demonstrating that 14-3-3 zeta binds all three PKC subclasses via the C1 domain and confers Ca2+-independent autonomous activity selectively on PKC epsilon connected the early in vitro PKC findings to neuronal contexts.\",\n      \"evidence\": \"Reciprocal co-IP and kinase activity assays in differentiated PC12 cells and rodent brain\",\n      \"pmids\": [\"12485398\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Physiological output of autonomous PKC activity not defined\", \"Single-lab characterization\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Quantifying nuclear-cytoplasmic shuttling kinetics explained why 14-3-3 zeta has a higher steady-state nuclear presence than other isoforms, identifying a Crm1-dependent export mechanism.\",\n      \"evidence\": \"FRAP of YFP fusions in multiple cell types with leptomycin B inhibition\",\n      \"pmids\": [\"14996909\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Nuclear functions driving the higher residence not identified\", \"Cargo coupling to shuttling not defined\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Defining the PI3K/Akt/MDM2/p53 axis and BAD sequestration under SIRT2 control established how 14-3-3 zeta restrains apoptosis and confers anoikis resistance, linking it mechanistically to early breast cancer progression.\",\n      \"evidence\": \"3D acini cultures with ectopic p53 rescue, transgenic mouse mammary cells, double siRNA epistasis, and subcellular fractionation\",\n      \"pmids\": [\"18339856\", \"18640115\", \"36\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct phospho-clients within the PI3K/Akt branch not all mapped\", \"Relative contribution of BAD versus p53 arms context-dependent\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Identifying ER stress involvement showed that 14-3-3 zeta accumulates in the microsomal fraction and protects neurons from ER stress and excitotoxic injury, broadening its role beyond classical signaling.\",\n      \"evidence\": \"siRNA knockdown, subcellular fractionation, and organotypic hippocampal cultures with pharmacological ER stress and kainate injury\",\n      \"pmids\": [\"18466333\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct ER client proteins not identified\", \"Mechanism of microsomal recruitment unknown\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Connecting YWHAZ to anthracycline resistance and 8q22 amplification gave clinical weight to its anti-apoptotic oncogenic function across patient cohorts.\",\n      \"evidence\": \"Bidirectional siRNA/overexpression with drug sensitivity assays and integrated genomics in independent cohorts\",\n      \"pmids\": [\"20098429\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Resistance effector pathways downstream of YWHAZ not fully resolved\", \"Causality versus correlation in amplification cohorts limited\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Showing 14-3-3 zeta negatively modulates TGF-beta1 growth inhibition via Smad3 linker phosphorylation added a growth-control axis to its scaffold repertoire.\",\n      \"evidence\": \"Overexpression/knockdown, Smad3 phosphosite mutagenesis, p15 promoter reporter, and cell cycle analysis\",\n      \"pmids\": [\"20082218\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether 14-3-3 zeta directly recruits the relevant Smad3 kinase unclear\", \"In vivo relevance not tested\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Establishing the YWHAZ-beta-catenin interaction that blocks beta-TrCP-mediated ubiquitination explained how it stabilizes beta-catenin to drive EMT and metastasis.\",\n      \"evidence\": \"Co-IP, knockdown, beta-catenin phosphosite mutants, invasion/migration and in vivo tumorigenesis assays\",\n      \"pmids\": [\"22912335\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Stoichiometry of the displacement of beta-TrCP not quantified\", \"Structural basis of S552-dependent complex formation undefined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Demonstrating that knockdown activates JNK/p38 and enforces cell-cell adhesion clarified isoform-specific oncogenic functions that restrain stress apoptosis and adhesion.\",\n      \"evidence\": \"siRNA knockdown with apoptosis, JNK/p38 signaling, and adhesion protein readouts\",\n      \"pmids\": [\"17704798\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct clients linking 14-3-3 zeta to JNK/p38 not identified\", \"Single-lab phenotypic study\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Transgenic overexpression confirmed in vivo that 14-3-3 zeta down-regulates UPR components and protects against ER stress and seizure-induced neuronal death.\",\n      \"evidence\": \"Transgenic mouse overexpression with tunicamycin and status epilepticus injury models and UPR pathway analysis\",\n      \"pmids\": [\"23359526\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular target controlling UPR component levels not identified\", \"Whether effect is cell-autonomous in neurons unresolved\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Crystallography of the integrin alpha4 tail complex resolved both canonical phosphomotif and accessory contacts, defining the structural rules of phospho-dependent client engagement.\",\n      \"evidence\": \"X-ray crystallography, ITC, NMR, and mutagenesis across integrin tail variants\",\n      \"pmids\": [\"23763993\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional ranking of the multiple integrin tail interactions in cells incomplete\", \"Phosphorylation-independent contacts mechanistically uncharacterized\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identifying ATF-1/CREB control at a CRE element defined how YWHAZ transcription is regulated and induced under TNF-alpha stimulation.\",\n      \"evidence\": \"5' RACE, EMSA, ChIP, reporter assays, and ATF-1 siRNA knockdown\",\n      \"pmids\": [\"24690670\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Upstream signals converging on the CRE not fully mapped\", \"Transcript-variant-specific functions not resolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Showing PP2A-mediated BAD release and STAT3/SKP2/p27 dependence linked 14-3-3 zeta to senescence control and the intrinsic mitochondrial apoptosis pathway.\",\n      \"evidence\": \"Co-IP, bidirectional manipulation with rescue, fractionation, and apoptosis/senescence markers in HNSCC and glioblastoma cells\",\n      \"pmids\": [\"21118500\", \"25412315\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct STAT3 binding by 14-3-3 zeta not demonstrated\", \"Single-lab pathways not independently confirmed\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Placing 14-3-3 zeta upstream of RhoA in actomyosin contraction and within TLR3-TICAM-1 innate immune signaling extended its scaffold role to ECM remodeling and interferon responses.\",\n      \"evidence\": \"siRNA knockdown with RhoA activation, MLC/cofilin phosphorylation, contraction assays, and TICAM-1 multimerization/IRF3 translocation readouts\",\n      \"pmids\": [\"26906158\", \"27058640\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct clients controlling RhoA levels and TICAM-1 assembly not identified\", \"Single-lab mechanistic placements\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Knockout mouse and L-cell studies established that 14-3-3 zeta regulates glucose homeostasis through a GLP-1-dependent mechanism, a metabolic role distinct from its signaling functions.\",\n      \"evidence\": \"Ywhaz knockout mice, glucose tolerance tests, GLP-1 measurement, GLUTag knockdown, and GLP-1R antagonist rescue\",\n      \"pmids\": [\"27167773\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular clients controlling proglucagon processing not identified here\", \"Tissue-specific contributions not dissected\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Showing YWHAZ stabilizes RUNX2 to promote osteoblast differentiation added a protein-stabilization function relevant to bone formation.\",\n      \"evidence\": \"miR-451 manipulation, knockdown, RUNX2 stability blotting, and OVX mouse bone morphometry\",\n      \"pmids\": [\"30151091\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether YWHAZ binds RUNX2 directly not demonstrated\", \"Mechanism of stabilization undefined\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Identifying TRIM21 as an E3 ligase that promotes YWHAZ degradation began to define how YWHAZ protein levels are post-translationally controlled.\",\n      \"evidence\": \"Co-IP with LC-MS/MS, BiFC, RING-deletion constructs, and proliferation assays\",\n      \"pmids\": [\"29673441\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"YWHAZ ubiquitination sites not mapped\", \"No functional consequence of TRIM21-driven YWHAZ turnover in the tested proliferation pathway\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"The CFC syndrome S230W variant established a direct human disease link and revealed a gain-of-function mechanism in RAS-ERK signaling, distinguishing it from wild-type Raf regulation.\",\n      \"evidence\": \"Xenopus embryo overexpression, dominant-negative FGFR rescue, ERK phosphorylation, Raf co-IP, and casein kinase 1a phosphorylation assays\",\n      \"pmids\": [\"31024343\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mammalian/patient cellular phenotype not directly characterized\", \"How escape from CK1a phosphorylation increases Raf binding mechanistically unresolved\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"PIM1-dependent phosphorylation coupling YWHAZ to androgen receptor on chromatin defined a transcriptional co-regulatory function at migration/invasion genes with hnRNPK and TRIM28.\",\n      \"evidence\": \"Co-IP, ChIP-seq, RIME, and gene expression analysis in PIM1-overexpressing cells\",\n      \"pmids\": [\"34697370\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether chromatin association is direct or scaffold-mediated unclear\", \"Generalizability beyond PIM1-high cells untested\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Identifying DAAM1, G3BP1, and TMEM65 as YWHAZ partners connected it to microfilament/RhoA remodeling, Bax sequestration, and PI3K-Akt-mTOR-driven tumorigenesis with regulated YWHAZ stability.\",\n      \"evidence\": \"Co-IP, colocalization, RhoA and Bax localization readouts, protein stability assays, and xenograft models across cancer types\",\n      \"pmids\": [\"34453038\", \"32989225\", \"38341472\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct phospho-dependence of these interactions not all established\", \"Single-lab interaction studies needing reciprocal validation\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Establishing m6A-dependent YWHAZ mRNA stabilization by YBX1/IGF2BP defined the post-transcriptional control that sustains YWHAZ in leukemia stem cells.\",\n      \"evidence\": \"RIP, RNA decay assays, CRISPR KO with YWHAZ rescue, and a CML mouse model\",\n      \"pmids\": [\"36512307\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Specific m6A sites on YWHAZ mRNA not all mapped\", \"Whether this regulation operates outside CML untested\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Zebrafish knockout linked ywhaz to monoaminergic neurotransmission and neuronal connectivity, and islet studies tied it to alpha-cell proglucagon processing, deepening its neural and metabolic physiology.\",\n      \"evidence\": \"CRISPR zebrafish KO with whole-brain imaging, monoamine quantification and pharmacological rescue; mouse/human islet alpha-cell ablation with liraglutide\",\n      \"pmids\": [\"35501409\", \"35867787\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular clients mediating monoaminergic and paracrine effects not identified\", \"Mechanistic continuity between neural and metabolic roles unestablished\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Small-molecule co-crystal structures with PPD and prior probes mapped druggable surface residues and demonstrated stabilization of 14-3-3 zeta/phosphopeptide interactions.\",\n      \"evidence\": \"Co-crystallography, ITC, biolayer interferometry, mutagenesis, and fusicoccin/lacosamide chemical biology\",\n      \"pmids\": [\"34295206\", \"22105970\", \"21692503\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Therapeutic consequences of modulating these surfaces not established\", \"Endogenous ligands at these sites largely uncharacterized\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How the hundreds of client interactions are selected, prioritized, and dynamically regulated to produce distinct cell-type-specific outcomes remains the central open question.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model linking phospho-client selection to context-specific physiological output\", \"Reconciliation of opposing Raf inhibition versus activation roles unresolved\", \"Direct versus scaffold-mediated nature of many reported interactions undefined\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [1, 3, 5, 6, 20]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [3, 7, 12, 18]},\n      {\"term_id\": \"GO:0140313\", \"supporting_discovery_ids\": [13, 21, 40]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [13, 18, 40, 42]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [11, 18, 29]},\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [14, 39]},\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [42]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [3, 4, 12, 18, 27]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [13, 21, 40]},\n      {\"term_id\": \"R-HSA-8953897\", \"supporting_discovery_ids\": [14, 39]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [15, 27, 30, 31]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [25]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"RAF1\", \"BAD\", \"CTNNB1\", \"LIMK1\", \"CFL1\", \"WEE1\", \"DAAM1\", \"AR\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}