{"gene":"PTP4A3","run_date":"2026-06-10T06:43:36","timeline":{"discoveries":[{"year":2004,"finding":"NMR solution structure of PRL-3 (residues 1-162) reveals it belongs to the dual-specificity phosphatase class with closest structural homology to VHR phosphatase. The active site is unusually hydrophobic and lacks the catalytically important serine/threonine found in most other phosphatases. Cys49 forms an intramolecular disulfide bond with the catalytic Cys104 under mildly reducing conditions, suggesting a potential redox-regulatory mechanism.","method":"NMR solution structure determination combined with kinetic studies of site-directed mutants","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Strong — NMR structure with mutagenesis and kinetic validation in single rigorous study","pmids":["14704153"],"is_preprint":false},{"year":2004,"finding":"NMR structure of human PRL-3 phosphatase domain shows conformational flexibility of active-site loops; addition of phosphate or vanadate stabilizes active-site residues, indicating the apo form has a disordered active site that is stabilized by substrate/inhibitor binding.","method":"NMR spectroscopy of apo and phosphate/vanadate-bound states","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR structure with ligand-binding functional validation, single lab","pmids":["15135076"],"is_preprint":false},{"year":2003,"finding":"PRL-3 catalytic activity is required for its pro-migratory and pro-invasive function; a catalytically inactive C104S mutant has significantly reduced migration-promoting activity. PRL-3 is associated with diverse membrane structures involved in cell movement. Stable expression of PRL-3 in CHO cells induces metastatic tumor formation in mice.","method":"Stable cell line expression, catalytically inactive mutant (C104S), transwell migration/invasion assays, mouse metastasis model","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — catalytic mutant + in vitro + in vivo, replicated across multiple labs","pmids":["12782572"],"is_preprint":false},{"year":2004,"finding":"The catalytic domain of PRL-3 is essential for metastasis in vivo; CHO cells expressing catalytically inactive PRL-3 (C104S) lose metastatic activity in a tail-vein mouse model, while wild-type PRL-3-expressing cells form metastatic tumors in the lung and can sprout into blood vessels.","method":"Tail-vein injection of EGFP-PRL-3 vs EGFP-PRL-3(C104S) CHO cells in mice, microscopic examination","journal":"Cancer biology & therapy","confidence":"High","confidence_rationale":"Tier 2 / Strong — catalytic mutant in vivo model, clear functional readout","pmids":["15326366"],"is_preprint":false},{"year":2007,"finding":"PRL-3 promotes epithelial-mesenchymal transition (EMT) by activating PI3K/Akt, inactivating GSK-3β, up-regulating mesenchymal markers (fibronectin, Snail) and down-regulating epithelial markers (E-cadherin, γ-catenin, integrin β3). PRL-3 down-regulates PTEN expression. These effects require phosphatase activity (C104S mutant abrogates them) and are blocked by PI3K inhibitor LY294002.","method":"Stable and transient transfection, phospho-specific antibodies, PI3K inhibitor, catalytic mutant","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods, catalytic mutant control, replicated across cell lines","pmids":["17409395"],"is_preprint":false},{"year":2007,"finding":"Ezrin is a direct cellular substrate of PRL-3. PRL-3 overexpression dephosphorylates Ezrin-Thr567 (and tyrosine residues) in HCT116 cells, with Thr567 identified as the primary target. In vitro dephosphorylation assays confirm Ezrin-Thr567 as a direct substrate and establish PRL-3 as a dual-specificity phosphatase.","method":"Phosphoproteomic profiling, RNA interference, in vitro dephosphorylation assay, catalytic mutant comparison","journal":"Biochimica et biophysica acta","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro dephosphorylation assay with RNAi validation, single lab with multiple orthogonal methods","pmids":["18078820"],"is_preprint":false},{"year":2006,"finding":"Integrin α1 is a PRL-3-interacting protein identified by yeast two-hybrid screen and verified by pull-down and co-immunoprecipitation. PRL-3 down-regulates tyrosine phosphorylation of integrin β1 and increases ERK1/2 phosphorylation.","method":"Yeast two-hybrid screen, pull-down assay, co-immunoprecipitation, Western blot","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — Co-IP and pull-down confirmed, single lab, two complementary methods","pmids":["16472776"],"is_preprint":false},{"year":2009,"finding":"PRL-3 associates with integrin β1 (co-immunoprecipitation) and its expression positively correlates with ERK1/2 phosphorylation. siRNA depletion of integrin β1 abrogates PRL-3-induced ERK1/2 activation and blocks PRL-3-induced motility and invasion. PRL-3 promotes MMP2 gelatinolytic activity and reduces TIMP2 expression, mediating invasion downstream of integrin β1-ERK1/2 signaling.","method":"Co-immunoprecipitation, siRNA knockdown, transwell assay, gelatin zymography, ERK inhibitor (U0126), nude mouse lung metastasis model","journal":"Molecular cancer","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP, epistasis by siRNA knockdown, in vitro and in vivo validation, single lab with multiple orthogonal methods","pmids":["19930715"],"is_preprint":false},{"year":2009,"finding":"PRL-3 interacts with and dephosphorylates keratin 8 (KRT8) at S73 and S431. PRL-3 and KRT8 co-localize at cellular lamellipodia and ruffles in vivo. This interaction requires PRL-3 phosphatase activity (C104S mutant and PRL-3 inhibitor block KRT8 dephosphorylation). Reduction in KRT8 phosphorylation is observed at invasive front and liver metastases in colorectal cancer tissue.","method":"Phosphoprotein expression profiling, co-immunoprecipitation, colocalization, PRL-3 inhibitor, catalytic mutant (C104S)","journal":"International journal of cancer","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with colocalization and catalytic mutant control, single lab","pmids":["19115206"],"is_preprint":false},{"year":2001,"finding":"PRL-3 possesses enzymatic phosphatase activity (demonstrated by cleavage of 6,8-difluoro-4-methylumbelliferyl phosphate substrate), which is inhibited by vanadate. Catalytically inactive C104S mutant fails to inhibit angiotensin II-induced calcium mobilization, while wild-type PRL-3 inhibits it. Wild-type PRL-3 promotes dephosphorylation of p130cas in response to AngII.","method":"Purified recombinant enzyme activity assay, HEK293 transfection, FLIPR calcium assay, Western blot with phospho-specific antibodies","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — in vitro enzymatic assay with catalytic mutant, cellular functional validation, single lab","pmids":["11355880"],"is_preprint":false},{"year":2010,"finding":"PCBP1 suppresses PRL-3 protein expression post-transcriptionally by binding to triple GCCCAG motifs in the 5' UTR of PRL-3 mRNA and retarding its incorporation into polyribosomes. PCBP1 overexpression inhibits PRL-3 expression and inactivates AKT; PCBP1 knockdown causes PRL-3 upregulation and AKT activation.","method":"5' UTR mutational analysis, polyribosome fractionation, RNA-protein binding assay, PCBP1 overexpression/knockdown","journal":"Cancer cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (polyribosome fractionation, mutational analysis, gain/loss-of-function), independent clinical validation","pmids":["20609352"],"is_preprint":false},{"year":2011,"finding":"PRL-3 shows phosphatase activity toward the phosphoinositide PI(4,5)P2 in vitro (demonstrated by two complementary biochemical assays), suggesting it is a phosphatidylinositol 5-phosphatase. Wild-type PRL-3 does not dephosphorylate tested phosphopeptides. The C104S mutant is structurally destabilized and cannot promote cell migration; the hyperactive A111S mutant is inactive against PIPs and also cannot promote migration. Correlation between PI(4,5)P2 dephosphorylation activity and cell migration phenotype across mutants supports PI(4,5)P2 as a functionally relevant substrate.","method":"In vitro phosphoinositide dephosphorylation assays (two complementary biochemical methods), molecular docking, stable HEK293 cell lines, migration assay","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro assay with multiple mutants and two complementary methods, phenotypic correlation, single lab","pmids":["21806020"],"is_preprint":false},{"year":2008,"finding":"Prl-3 is a p53 transcriptional target gene. Prl-3 overexpression induces G1 cell-cycle arrest downstream of p53 via PI3K-Akt-activated negative feedback. Loss of Prl-3 expression also induces cell-cycle arrest, indicating that basal Prl-3 is required for normal cell-cycle progression.","method":"Reporter assays for p53 transcriptional activation, PI3K inhibitor epistasis, cell-cycle analysis by FACS, gain/loss-of-function","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (transcriptional assay, pharmacological epistasis, flow cytometry), single lab","pmids":["18471976"],"is_preprint":false},{"year":2013,"finding":"PRL-3 induces hyperactivation of EGFR and its downstream cascades by transcriptionally downregulating PTP1B (an inhibitory phosphatase for EGFR), thereby creating cellular addiction to EGFR signaling. Loss of PTP1B mediates PRL-3's EGFR activation effect.","method":"Multiple human cancer cell lines, PTP1B knockdown/rescue, phospho-EGFR Western blot, gene expression analysis","journal":"The Journal of clinical investigation","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple cell lines, mechanistic epistasis (PTP1B knockdown), replicated across cancer types","pmids":["23867504"],"is_preprint":false},{"year":2015,"finding":"USP4 (ubiquitin-specific protease 4) physically interacts with PRL-3 and stabilizes it via deubiquitination. USP4 knockdown reduces PRL-3 protein levels; USP4 overexpression increases PRL-3 stability. This stabilization leads to AKT activation and E-cadherin reduction.","method":"Co-immunoprecipitation, ubiquitination assay, siRNA knockdown, Western blot","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with functional deubiquitination assay, single lab","pmids":["26669864"],"is_preprint":false},{"year":2010,"finding":"PRL-3 interacts with stathmin (co-immunoprecipitation in cell lines and tissues), and both contribute to microtubule destabilization in colorectal cancer cells.","method":"Proteomic screen, co-immunoprecipitation in cell lines and CRC tissue, microtubule stability assay","journal":"Journal of proteome research","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — Co-IP confirmed in endogenous setting and clinical tissue, single lab","pmids":["20806969"],"is_preprint":false},{"year":2010,"finding":"TGFβ suppresses PRL-3 transcription through Smad-dependent inhibition at the PRL-3 promoter. PRL-3 activates PI3K/AKT signaling to promote cell survival against stress-induced apoptosis, mediating metastatic colonization independently of primary tumor growth.","method":"Promoter-luciferase reporter assays, Smad knockdown, PI3K inhibitor, orthotopic mouse metastasis model, siRNA knockdown","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Moderate — promoter assay with epistasis and in vivo validation, multiple orthogonal methods, single lab","pmids":["21084277"],"is_preprint":false},{"year":2011,"finding":"PRL-3 is a downstream target of FLT3-STAT5 signaling in AML; FLT3 inhibition (ABT-869) reduces PRL-3 expression. PRL-3 interacts with HDAC4 (co-immunoprecipitation). SAHA (HDAC inhibitor) downregulates PRL-3 via a proteasome-dependent pathway. Ectopic PRL-3 expression confers therapeutic resistance through upregulation of STAT pathway activity and anti-apoptotic Mcl-1.","method":"Co-immunoprecipitation (PRL-3-HDAC4), siRNA knockdown, FLT3 inhibitor treatment, proteasome inhibitor, STAT pathway Western blot","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with pharmacological and genetic epistasis, single lab","pmids":["21589872"],"is_preprint":false},{"year":2006,"finding":"PRL-3-expressing tumor cells reduce IL-4 expression, attenuating IL-4's inhibitory effects on HUVEC vasculature, and directly recruit endothelial cells and initiate angiogenesis in vivo. Both CHO and DLD-1 cells expressing PRL-3 redirect HUVEC migration and enhance vascular formation.","method":"In vitro co-culture system with HUVECs, in vivo tumor implantation in nude mice with host endothelial cell recruitment, IL-4 assay","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro and in vivo experiments with mechanistic IL-4 link, single lab","pmids":["17018620"],"is_preprint":false},{"year":2014,"finding":"PTP4A3-null endothelial cells exhibit severely reduced VEGF-stimulated migration. VEGF-induced Src phosphorylation is completely ablated in Ptp4a3-null endothelial cells, placing PTP4A3 as a required mediator in VEGF-Src signaling in endothelial cells. Ptp4a3-null mice show reduced tumor microvessel density and attenuated VEGF-mediated vascular permeability.","method":"Ptp4a3 knockout mouse model, primary endothelial cell isolation, VEGF stimulation, phospho-Src Western blot, wound healing assay, in vivo vascular permeability assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic knockout with primary cells, in vivo and ex vivo validation, multiple orthogonal readouts","pmids":["24403062"],"is_preprint":false},{"year":2014,"finding":"PTP4A3 deletion from murine colorectal tumor cells impairs colony formation, spheroid formation, migration, adherence, and increases expression of the extracellular matrix tumor suppressor Emilin1. These phenotypes are recapitulated by the allosteric small-molecule PTP4A3 inhibitor JMS-053 in a PTP4A3-expression-dependent manner.","method":"CRISPR/gene-targeted Ptp4a3 knockout in murine tumor cells, JMS-053 inhibitor, gene expression analysis, colony/spheroid/migration assays","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic knockout confirmed by pharmacological inhibitor, multiple orthogonal phenotypic assays, single rigorous study","pmids":["29746167"],"is_preprint":false},{"year":2011,"finding":"VEGF induces PRL-3 transcription in HUVECs through the transcription factor MEF2C acting on two functional MEF2 binding sites in the PRL-3-iso2 promoter. MEF2C knockdown abolishes VEGF-induced PRL-3 upregulation. PRL-3 blocking suppresses tube formation by HUVECs.","method":"5'UTR mapping, promoter-luciferase reporter with MEF2 site mutations, MEF2C siRNA, MEF2C overexpression, tube formation assay","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — promoter assay with mutagenesis and siRNA epistasis, single lab","pmids":["22073279"],"is_preprint":false},{"year":2012,"finding":"PRL-3 interacts with ADP-ribosylation factor 1 (Arf1), co-localizes with Arf1 in an endosomal compartment, and regulates Arf1 activation. PRL-3-mediated cell migration depends on Arf1 expression and activation and is sensitive to Brefeldin A. PRL-3 modulates recycling of α5 integrins, requiring phosphatase activity and Arf1 co-compartmentalization.","method":"Co-immunoprecipitation, colocalization, Arf1 knockdown, Brefeldin A treatment, integrin recycling assay, catalytic mutant","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with functional epistasis and integrin recycling assay, single lab","pmids":["22595524"],"is_preprint":false},{"year":2012,"finding":"PRL-3 activates NF-κB signaling by interacting with the telomere-associated protein RAP1. PRL-3 promotes cytosolic localization of RAP1, enhances phosphorylation of the p65 NF-κB subunit in a RAP1-dependent manner, and transcriptionally activates RAP1 in a p65-dependent manner, forming a positive feedback loop.","method":"Co-immunoprecipitation, siRNA knockdown of RAP1, microarray analysis, p65 phosphorylation Western blot, colon cancer tissue array","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with epistasis by RAP1 silencing and clinical tissue validation, single lab","pmids":["23178297"],"is_preprint":false},{"year":2009,"finding":"PRL-3 interacts with CDH22 (a cadherin family member), identified by yeast two-hybrid and confirmed by GST pull-down, Co-IP, and colocalization. PRL-3 inactivates GSK-3β (by phosphorylation), increases Snail expression, and promotes vimentin upregulation/E-cadherin downregulation consistent with EMT.","method":"Yeast two-hybrid, GST pull-down, Co-IP, colocalization, phospho-specific antibodies, GSK-3β inhibitor lithium chloride","journal":"Cancer biology & therapy","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — yeast two-hybrid confirmed by pull-down and Co-IP, single lab","pmids":["19440036"],"is_preprint":false},{"year":2012,"finding":"Nuclear PRL-3 is observed in colorectal cancer cells and regulates histone H3K9 methylation by affecting the activities of the histone demethylases JMJD1B and JMJD2B, which are enriched among PRL-3-associated proteins.","method":"Subcellular fractionation/immunofluorescence (nuclear PRL-3), siRNA knockdown of JMJD1B/JMJD2B, histone methylation Western blot, proteomic association analysis","journal":"Gut","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct nuclear localization confirmed, functional histone methylation assay with siRNA, single lab","pmids":["22345654"],"is_preprint":false},{"year":2011,"finding":"FKBP38 directly binds PRL-3 (yeast two-hybrid and confirmed in vivo by Co-IP; N-terminal region of FKBP38 required for binding). FKBP38 overexpression reduces endogenous PRL-3 via proteasome-dependent degradation; FKBP38 depletion increases PRL-3 protein. FKBP38 suppresses PRL-3-mediated p53 activity and cell proliferation.","method":"Yeast two-hybrid, Co-IP, FKBP38 overexpression/siRNA, proteasome inhibitor, proliferation assay","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — yeast two-hybrid confirmed by Co-IP with gain/loss-of-function, single lab","pmids":["21320469"],"is_preprint":false},{"year":2013,"finding":"Targeted genetic deletion of Ptp4a3 in mice reduces colon tumor formation by ~50% in the azoxymethane/dextran sodium sulfate colitis-associated cancer model. Ptp4a3-null tumors show elevated IGF1Rβ and c-MYC levels compared to wildtype tumors.","method":"Gene-targeted Ptp4a3 knockout mouse, AOM/DSS colon cancer model, qPCR, Western blot","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 / Strong — definitive genetic knockout model with quantitative tumor phenotype, mechanistic follow-up","pmids":["23555575"],"is_preprint":false},{"year":2014,"finding":"PRL-3 accumulates in autophagosomes upon inhibition of autophagic degradation and enhances PIK3C3-BECN1-dependent autophagosome formation in an ATG5-dependent manner. PRL-3's promotion of autophagy requires both catalytic activity and prenylation-dependent membrane association. PRL-3 itself becomes an autophagic substrate, establishing a negative feedback loop. Autophagy pathway is used by PRL-3 to promote cell growth with concomitant AKT activation.","method":"Autophagosome isolation/co-localization, LC3-I/II conversion assay, ATG5 knockdown, catalytic and prenylation mutants, SQSTM1 degradation assay","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods with mutant validation, single lab","pmids":["25136802"],"is_preprint":false},{"year":2015,"finding":"PRL-3 dephosphorylates NHERF1 at a serine site, triggering NHERF1 cytoplasmic translocation. This co-translocates PTEN from nucleus to cytoplasm, reducing nuclear PTEN and elevating AKT phosphorylation, promoting melanoma malignant progression.","method":"Phosphorylation analysis, subcellular fractionation, co-localization imaging, siRNA knockdown, in vivo tumor model","journal":"The Journal of investigative dermatology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — phosphorylation/localization data with in vivo validation, single lab","pmids":["25897829"],"is_preprint":false},{"year":2015,"finding":"PRL-3 increases mTOR translocation to lysosomes via increased mTOR binding affinity to Rag GTPases in an Akt-independent manner, and also activates mTORC1 via PI3K/Akt-mediated TSC2 suppression/Rheb-GTP activation, leading to downstream p70S6K and 4E-BP1 phosphorylation and increased MMP-2 secretion and invasiveness.","method":"mTOR lysosomal localization by immunofluorescence, Rag GTPase co-immunoprecipitation, Akt inhibitor, rapamycin treatment, invasion assay, multiple cancer models","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple mechanistic experiments in one lab with pharmacological epistasis","pmids":["26597054"],"is_preprint":false},{"year":2015,"finding":"PRL-3 mediates protein maturation of the NKG2D ligand ULBP2 by regulating tyrosine phosphorylation of HSP60, which constitutively associates with ULBP2. PRL-3 inhibition/knockdown blocks posttranslational maturation of ULBP2, causing intracellular retention, rather than affecting its shedding.","method":"High-throughput screening for PRL-3 inhibitors, siRNA knockdown, co-immunoprecipitation (ULBP2-HSP60), phospho-tyrosine Western blot, flow cytometry","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with siRNA validation and mechanistic HSP60 phosphorylation link, single lab","pmids":["25687758"],"is_preprint":false},{"year":2016,"finding":"PRL-3 promotes epithelial lumen disruption and ectopic lumen formation in polarized epithelial MDCK and Caco2 cysts by accelerating cytokinesis and causing midbody mispositioning, without altering mitotic spindle orientation or asymmetric abscission.","method":"3D cyst culture, time-lapse microscopy, cytokinesis timing measurement, spindle orientation assay, midbody localization analysis, catalytic mutant comparison","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — live imaging with multiple mechanistic controls and 3D model, single lab","pmids":["27656108"],"is_preprint":false},{"year":2017,"finding":"PRL-3 interacts with integrin β1 and FAK-pY397 in focal adhesion structures (co-immunoprecipitation). PRL-3 plasma membrane anchorage (via CAAX prenylation) is required for PRL-3-induced migration; a prenylation-deficient mutant abolishes migration. PRL-3 dephosphorylates integrin β1 in its intracytoplasmic S/T region and regulates integrin β1 clustering in focal adhesions on collagen I but not fibronectin.","method":"Co-immunoprecipitation, integrin β1 knockdown, prenylation mutant, phosphorylation analysis, confocal imaging of focal adhesions, migration assay","journal":"Experimental cell research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with multiple mutant controls, single lab","pmids":["28284838"],"is_preprint":false},{"year":2017,"finding":"PRL-3 promotes telomere deprotection and chromosomal instability through its association with the shelterin component RAP1, which mediates PRL-3 recruitment to telomeric DNA along with TRF2. PRL-3 overexpression dissociates RAP1 and TRF2 from telomeric DNA in vitro and in cells. Disruption of the PRL-3-RAP1 complex or ectopic TRF2 counteracts PRL-3-induced telomere deprotection.","method":"Co-immunoprecipitation (RAP1, TRF2), ChIP at telomeres, in vitro DNA-protein dissociation assay, PRL-3 transgenic mice, DSS-induced colon malignancy model","journal":"Nucleic acids research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro and in vivo experiments with transgenic mouse and rescue experiments, single lab","pmids":["28482095"],"is_preprint":false},{"year":2018,"finding":"PRL-3 dephosphorylates FZR1 (a regulatory subunit of APC/C), facilitating APC/C(FZR1) complex assembly, which leads to enhanced ubiquitination and degradation of Aurora kinase A (AURKA). This PRL-3-FZR1-AURKA axis promotes G2-M arrest, chromosomal instability, and self-renewal in colorectal cancer. PRL-3 physically interacts with both AURKA and FZR1.","method":"Co-immunoprecipitation (PRL-3-AURKA, PRL-3-FZR1), ubiquitination assay, phosphatase-dead mutant, FZR1 phosphorylation Western blot, APC/C activity assay, xenograft model","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro dephosphorylation combined with Co-IP, ubiquitination assay, and rescue by ectopic AURKA, multiple orthogonal methods, single lab","pmids":["30498084"],"is_preprint":false},{"year":2018,"finding":"PRL-3 dephosphorylates Leo1 (a component of the PAF complex) on serine residues. Serine-dephosphorylated Leo1 binds directly to β-catenin, promoting nuclear β-catenin accumulation and TCF/LEF target gene transactivation (cyclin D1, c-myc) in AML.","method":"SILAC proteomics, Co-IP (Leo1 identified as direct PRL-3 substrate), phosphorylation assay, β-catenin nuclear localization, TCF/LEF reporter assay, in vitro and in vivo rescue experiments","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1 / Moderate — substrate identification by proteomics confirmed by phosphorylation assay, Co-IP, and functional rescue, single rigorous study","pmids":["30305722"],"is_preprint":false},{"year":2014,"finding":"PRL-3 overexpression in AML increases JMJD2C histone demethylase occupancy on the Leo1 promoter, reducing H3K9me3 repressive marks and promoting Leo1 gene expression. Leo1 mediates PRL-3 oncogenic activities (cytokine-independent growth) and loss of Leo1 destabilizes the PAF complex and downregulates SOX2/SOX4.","method":"SILAC proteomics, ChIP (JMJD2C and H3K9me3 at Leo1 promoter), siRNA knockdown, cytokine-independence assay","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP with proteomic and functional validation, single lab","pmids":["24686170"],"is_preprint":false},{"year":2016,"finding":"PRL-3 phosphatase activity dependently upregulates LIN28B, which represses the let-7 miRNA family and induces a stem cell-like transcriptional program in AML cells. This PRL-3/LIN28B/let-7 axis is required for leukemogenesis in vitro and in vivo.","method":"Catalytic mutant comparison, LIN28B expression analysis, let-7 miRNA measurement, xenograft mouse model","journal":"Molecular cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — catalytic mutant with in vivo model, single lab","pmids":["28011885"],"is_preprint":false},{"year":2021,"finding":"NSD2 interacts with SMARCA2 (SWI/SNF ATPase) in a non-canonical, SWI/SNF complex-independent manner. The NSD2-SMARCA2 complex binds the PTP4A3 promoter, increases the permissive H3K36me2 histone mark, and transcriptionally activates PTP4A3 expression in t(4;14) multiple myeloma.","method":"SILAC mass spectrometry, Co-IP (NSD2-SMARCA2), ChIP (H3K36me2 at PTP4A3 promoter), RNA sequencing, BET inhibitor PFI-3 displacement experiment, xenograft model","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 / Strong — SILAC-confirmed interaction, ChIP validation, pharmacological displacement, in vivo model, multiple orthogonal methods","pmids":["33602783"],"is_preprint":false},{"year":2008,"finding":"The C-terminal CAAX motif of PRL-3, beyond directing farnesylation, plays an additional regulatory role by inhibiting the catalytic efficiency of PRL-3 in vitro. Truncation and mutation analysis invalidates the hypothesis that the C-terminal polybasic sequence is a nuclear localization signal.","method":"Truncated and mutant PRL-3 forms, in vitro phosphatase activity assay, subcellular localization analysis","journal":"Journal of cellular and molecular medicine","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — in vitro enzymatic assay with mutagenesis, single lab, limited follow-up","pmids":["19040419"],"is_preprint":false},{"year":2016,"finding":"PRL-3 promotes TNBC cell invasion by upregulating matrix metalloproteinase 10 (MMP10), increases TNBC cell adherence to laminin via focal adhesion pathway engagement (Src, ERK, RhoA, Rac1/2/3 GTPase). Loss of PRL-3 deactivates Src and ERK signaling and rearranges F-actin networks.","method":"PRL-3 knockdown/overexpression, Western blot (Src, ERK, RhoA, Rac1/2/3), invasion assay, adhesion assay, MMP10 analysis, F-actin staining","journal":"Cancer letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function and gain-of-function with multiple signaling readouts, single lab","pmids":["27452906"],"is_preprint":false},{"year":2013,"finding":"PRL-3 is downstream of BCR-ABL signaling in CML; inhibition of BCR-ABL by imatinib or BCR-ABL siRNA reduces PRL-3 expression. PRL-3 is required for CML cell proliferation and self-renewal. In imatinib-resistant P210 T315I cells, PRL-3 levels are maintained or increased despite BCR-ABL inhibition.","method":"BCR-ABL siRNA, imatinib treatment, PRL-3 shRNA, proliferation and self-renewal assays, Western blot","journal":"Molecular cancer","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic and pharmacological epistasis, single lab","pmids":["22995644"],"is_preprint":false},{"year":2019,"finding":"PTP4A3/PRL-3 dephosphorylates CRMP2 on T514. Inhibition of CRMP2 expression in PTP4A3-expressing uveal melanoma cells increases migration and invasiveness, accompanied by shortened actin filaments and increased cytoplasmic stiffness. The inactive phosphatase mutant does not recapitulate these actin/stiffness changes.","method":"Phosphorylation analysis (CRMP2-T514), siRNA knockdown, catalytic mutant, in vitro migration/invasion, AFM cell stiffness measurement, in vivo xenograft","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — phosphorylation change with catalytic mutant and functional validation, single lab","pmids":["30816227"],"is_preprint":false},{"year":2016,"finding":"PTP4A3 increases cell membrane accumulation of MMP14 by accelerating vesicular trafficking of MMP14. PTP4A3 and MMP14 co-localize and MMP14 vesicular trafficking is faster in the presence of catalytically active PTP4A3. Inhibition of MMP14 expression in PTP4A3-expressing uveal melanoma cells impairs migration and invasiveness.","method":"Flow cytometry of cell surface MMP14, immunofluorescence colocalization, MMP14 vesicular trafficking assay with active vs. inactive PTP4A3, MMP14 siRNA knockdown, in vivo invasiveness assay","journal":"Investigative ophthalmology & visual science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — trafficking assay with active/inactive mutant comparison, siRNA epistasis, single lab","pmids":["27096756"],"is_preprint":false},{"year":2021,"finding":"PRL-3 directly dephosphorylates p38 MAPK under stress conditions (CoCl2-induced hypoxia, UV, H2O2, and hypoxia), promoting cell survival and apoptosis resistance. This requires catalytic activity (C104S mutant fails to confer resistance). In vivo, cells expressing PRL-3 show higher metastatic burden and lower p38 MAPK phosphorylation.","method":"In vitro dephosphorylation assay (PRL-3 + p38 MAPK), catalytic mutant, apoptosis assay under multiple stress conditions, mouse lung metastasis model, phospho-p38 Western blot","journal":"Free radical biology & medicine","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro dephosphorylation assay with catalytic mutant and multiple stress conditions plus in vivo validation, single lab","pmids":["34662712"],"is_preprint":false},{"year":2013,"finding":"Ptp4a3-null colitis-associated colon cancer cells exhibit reduced clonogenicity and fail to form secondary tumors in nude mice, while wild-type Ptp4a3-expressing CD133+ tumor-initiating cells readily form secondary tumors, demonstrating PTP4A3's role in tumor-initiating cell self-renewal.","method":"Ptp4a3 knockout mouse model, AOM/DSS-induced tumors, CD133+ cell isolation, limiting dilution clonogenicity assay, secondary tumor transplantation in nude mice","journal":"Stem cell research","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic knockout in primary tumor cells with clonogenicity and in vivo tumor initiation assay","pmids":["24950307"],"is_preprint":false}],"current_model":"PRL-3/PTP4A3 is a prenylated, membrane-associated dual-specificity phosphatase whose catalytic activity (at Cys104) is required for its pro-metastatic functions; it dephosphorylates direct substrates including Ezrin-Thr567, CRMP2-T514, keratin 8, FZR1, Leo1, p38 MAPK, integrin β1, and phosphoinositide PI(4,5)P2, and signals through PI3K/Akt/mTORC1, NF-κB (via RAP1), EGFR (by suppressing PTP1B), and VEGF/Src pathways to promote cell migration, invasion, EMT, autophagy, angiogenesis, genomic instability, and cancer metastasis, while its expression is regulated transcriptionally by p53, TGFβ/Smad, VEGF/MEF2C, FLT3-STAT5, and NSD2-SMARCA2 chromatin remodeling, and post-transcriptionally by PCBP1 (translational suppression) and post-translationally by FKBP38 and USP4 (proteasomal stability)."},"narrative":{"mechanistic_narrative":"PTP4A3 (PRL-3) is a prenylated, membrane-associated dual-specificity phosphatase whose catalytic activity at Cys104 drives pro-metastatic cellular behaviors including migration, invasion, EMT, and metastatic colonization in vivo [PMID:12782572, PMID:15326366, PMID:17409395]. Structurally it adopts a dual-specificity phosphatase fold with an unusually hydrophobic active site whose loops are conformationally flexible until stabilized by substrate or vanadate binding, and its C-terminal CAAX motif both directs prenylation-dependent plasma membrane anchoring required for migration and modulates catalytic efficiency [PMID:14704153, PMID:15135076, PMID:28284838, PMID:19040419]. PRL-3 dephosphorylates a range of direct substrates that converge on cytoskeletal and adhesion remodeling — Ezrin-Thr567, keratin 8, integrin β1, CRMP2-T514, and the phosphoinositide PI(4,5)P2 — linking its activity to lamellipodial dynamics, focal-adhesion turnover, and directed cell movement [PMID:18078820, PMID:19115206, PMID:21806020, PMID:28284838, PMID:30816227]. A central output is activation of PI3K/Akt signaling, achieved in part by down-regulating PTEN and NHERF1-dependent PTEN compartmentalization, feeding EMT, survival, and mTORC1 activation [PMID:17409395, PMID:25897829, PMID:26597054]; PRL-3 additionally suppresses PTP1B to hyperactivate EGFR, engages integrin β1–ERK1/2 and VEGF–Src axes, and activates NF-κB through RAP1 [PMID:23867504, PMID:19930715, PMID:24403062, PMID:23178297]. Beyond the cytoplasm, nuclear PRL-3 promotes genomic instability by dephosphorylating FZR1 to drive APC/C-mediated AURKA degradation and by displacing the shelterin proteins RAP1/TRF2 from telomeres, and it dephosphorylates the PAF-complex subunit Leo1 to activate β-catenin/TCF transcription in leukemia [PMID:30498084, PMID:28482095, PMID:30305722]. PRL-3 dephosphorylates p38 MAPK to confer stress and apoptosis resistance and supports tumor-initiating cell self-renewal in vivo [PMID:34662712, PMID:24950307]. Its expression is tightly controlled — transcriptionally by p53, TGFβ/Smad, VEGF/MEF2C, and NSD2-SMARCA2 chromatin remodeling, translationally by PCBP1, and post-translationally by FKBP38 and USP4 governing proteasomal stability [PMID:18471976, PMID:21084277, PMID:22073279, PMID:33602783, PMID:20609352, PMID:21320469, PMID:26669864].","teleology":[{"year":2001,"claim":"Establishing that PRL-3 is a bona fide enzyme answered whether the protein had intrinsic catalytic activity and tied that activity to a cellular signaling output.","evidence":"Recombinant phosphatase activity assay inhibited by vanadate, plus C104S mutant in HEK293 calcium/p130cas assays","pmids":["11355880"],"confidence":"Medium","gaps":["No physiological substrate identified at this stage","Cellular readouts were indirect"]},{"year":2004,"claim":"Solution structures defined PRL-3 as a dual-specificity phosphatase and revealed an unusual hydrophobic, conformationally dynamic active site with a potential redox-regulatory disulfide, framing the enzymatic basis of its activity.","evidence":"NMR solution structures of apo and phosphate/vanadate-bound states with kinetic mutant analysis","pmids":["14704153","15135076"],"confidence":"High","gaps":["Structure alone did not define endogenous substrates","Redox regulation not demonstrated in cells"]},{"year":2004,"claim":"Linking catalytic activity to metastasis answered whether PRL-3's phosphatase function is causally required for malignant dissemination, not merely correlated.","evidence":"WT vs C104S PRL-3 stable CHO lines in transwell assays and tail-vein mouse metastasis models","pmids":["12782572","15326366"],"confidence":"High","gaps":["Substrates mediating the phenotype unknown at this point","Mechanism of membrane association not defined"]},{"year":2009,"claim":"Identification of direct substrates (Ezrin-Thr567, keratin 8, integrin β1) connected catalytic activity to specific cytoskeletal and adhesion targets driving motility.","evidence":"Phosphoproteomics, in vitro dephosphorylation, Co-IP, colocalization, and siRNA epistasis with catalytic mutant controls","pmids":["18078820","19115206","16472776","19930715"],"confidence":"High","gaps":["Relative contribution of each substrate to metastasis not ranked","Substrate selectivity determinants not defined"]},{"year":2011,"claim":"Demonstrating phosphatase activity toward PI(4,5)P2 expanded PRL-3's substrate repertoire to lipids and correlated lipid activity with migration across mutants.","evidence":"Two complementary in vitro phosphoinositide assays, docking, and migration assays with multiple mutants","pmids":["21806020"],"confidence":"High","gaps":["In vivo phosphoinositide dephosphorylation not shown","Tension with protein-substrate findings unresolved"]},{"year":2013,"claim":"Mapping PRL-3 onto PI3K/Akt, EGFR, and PTEN axes explained how phosphatase activity is amplified into broad oncogenic signaling and EMT.","evidence":"PTP1B knockdown/rescue across cancer lines, PI3K inhibitor epistasis, EMT marker profiling","pmids":["17409395","23867504"],"confidence":"High","gaps":["Direct substrate linking PRL-3 to PTP1B transcription not identified","Quantitative pathway hierarchy unclear"]},{"year":2014,"claim":"Genetic knockout models established PTP4A3 as physiologically required for tumor formation, tumor-initiating cell self-renewal, and VEGF-driven angiogenesis.","evidence":"Ptp4a3-null mice in AOM/DSS colon cancer, CD133+ clonogenicity/transplantation, and VEGF-Src endothelial signaling assays","pmids":["23555575","24950307","24403062"],"confidence":"High","gaps":["Substrates mediating self-renewal not fully defined","Endothelial Src substrate not identified"]},{"year":2018,"claim":"Nuclear and chromatin-linked functions answered how PRL-3 promotes genomic instability and stemness, via FZR1/APC/C-AURKA, telomeric RAP1/TRF2 displacement, and Leo1/β-catenin signaling.","evidence":"Co-IP, ubiquitination and APC/C activity assays, telomeric ChIP and in vitro dissociation, SILAC proteomics with rescue and xenograft models","pmids":["30498084","28482095","30305722","24686170"],"confidence":"High","gaps":["How a prenylated membrane phosphatase accesses telomeric/nuclear substrates not mechanistically resolved","Coordination between nuclear and cytoplasmic pools unclear"]},{"year":2021,"claim":"Layered regulation of PTP4A3 expression — chromatin (NSD2-SMARCA2), transcription factors, translation (PCBP1), and protein stability (FKBP38, USP4) — explained how its oncogenic dosage is set.","evidence":"SILAC/Co-IP, promoter ChIP and reporter assays, polyribosome fractionation, deubiquitination and degradation assays across cancer models","pmids":["33602783","20609352","26669864","21320469"],"confidence":"High","gaps":["Integration of multiple regulatory inputs in a single context not modeled","Upstream cues selecting each mode unclear"]},{"year":null,"claim":"How PRL-3 selects among its diverse protein and lipid substrates in different subcellular compartments, and which substrate set dominates clinically relevant metastasis, remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unifying model reconciling lipid-phosphatase and protein-phosphatase activities","Compartment-specific substrate prioritization unknown","No human Mendelian disease link established in this corpus"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[5,8,35,36,43,45]},{"term_id":"GO:0016787","term_label":"hydrolase activity","supporting_discovery_ids":[9,0,11]},{"term_id":"GO:0008289","term_label":"lipid binding","supporting_discovery_ids":[11]}],"localization":[{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[2,33]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[25,34]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[22]},{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[8,15]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[4,13,23,30]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[2,3,27,46]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[12,35]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[28]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[25,36,39]}],"complexes":[],"partners":["ITGB1","RAP1","FZR1","AURKA","USP4","FKBP38","ARF1","HDAC4"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O75365","full_name":"Protein tyrosine phosphatase type IVA 3","aliases":["PRL-R","Protein-tyrosine phosphatase 4a3","Protein-tyrosine phosphatase of regenerating liver 3","PRL-3"],"length_aa":173,"mass_kda":19.5,"function":"Protein tyrosine phosphatase which stimulates progression from G1 into S phase during mitosis. Enhances cell proliferation, cell motility and invasive activity, and promotes cancer metastasis. May be involved in the progression of cardiac hypertrophy by inhibiting intracellular calcium mobilization in response to angiotensin II","subcellular_location":"Cell membrane; Early endosome","url":"https://www.uniprot.org/uniprotkb/O75365/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/PTP4A3","classification":"Not Classified","n_dependent_lines":7,"n_total_lines":1208,"dependency_fraction":0.005794701986754967},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/PTP4A3","total_profiled":1310},"omim":[{"mim_id":"615149","title":"MICRO RNA 495; MIR495","url":"https://www.omim.org/entry/615149"},{"mim_id":"615148","title":"MICRO RNA 551A; MIR551A","url":"https://www.omim.org/entry/615148"},{"mim_id":"606449","title":"PROTEIN-TYROSINE PHOSPHATASE, TYPE 4A, 3; PTP4A3","url":"https://www.omim.org/entry/606449"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"","locations":[],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"heart muscle","ntpm":516.5},{"tissue":"skeletal muscle","ntpm":565.4}],"url":"https://www.proteinatlas.org/search/PTP4A3"},"hgnc":{"alias_symbol":["PRL-3","PRL-R","PRL3"],"prev_symbol":[]},"alphafold":{"accession":"O75365","domains":[{"cath_id":"3.90.190.10","chopping":"9-169","consensus_level":"high","plddt":88.3578,"start":9,"end":169}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O75365","model_url":"https://alphafold.ebi.ac.uk/files/AF-O75365-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O75365-F1-predicted_aligned_error_v6.png","plddt_mean":86.88},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=PTP4A3","jax_strain_url":"https://www.jax.org/strain/search?query=PTP4A3"},"sequence":{"accession":"O75365","fasta_url":"https://rest.uniprot.org/uniprotkb/O75365.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O75365/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O75365"}},"corpus_meta":[{"pmid":"12782572","id":"PMC_12782572","title":"PRL-3 and PRL-1 promote 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The active site is unusually hydrophobic and lacks the catalytically important serine/threonine found in most other phosphatases. Cys49 forms an intramolecular disulfide bond with the catalytic Cys104 under mildly reducing conditions, suggesting a potential redox-regulatory mechanism.\",\n      \"method\": \"NMR solution structure determination combined with kinetic studies of site-directed mutants\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — NMR structure with mutagenesis and kinetic validation in single rigorous study\",\n      \"pmids\": [\"14704153\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"NMR structure of human PRL-3 phosphatase domain shows conformational flexibility of active-site loops; addition of phosphate or vanadate stabilizes active-site residues, indicating the apo form has a disordered active site that is stabilized by substrate/inhibitor binding.\",\n      \"method\": \"NMR spectroscopy of apo and phosphate/vanadate-bound states\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR structure with ligand-binding functional validation, single lab\",\n      \"pmids\": [\"15135076\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"PRL-3 catalytic activity is required for its pro-migratory and pro-invasive function; a catalytically inactive C104S mutant has significantly reduced migration-promoting activity. PRL-3 is associated with diverse membrane structures involved in cell movement. Stable expression of PRL-3 in CHO cells induces metastatic tumor formation in mice.\",\n      \"method\": \"Stable cell line expression, catalytically inactive mutant (C104S), transwell migration/invasion assays, mouse metastasis model\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — catalytic mutant + in vitro + in vivo, replicated across multiple labs\",\n      \"pmids\": [\"12782572\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"The catalytic domain of PRL-3 is essential for metastasis in vivo; CHO cells expressing catalytically inactive PRL-3 (C104S) lose metastatic activity in a tail-vein mouse model, while wild-type PRL-3-expressing cells form metastatic tumors in the lung and can sprout into blood vessels.\",\n      \"method\": \"Tail-vein injection of EGFP-PRL-3 vs EGFP-PRL-3(C104S) CHO cells in mice, microscopic examination\",\n      \"journal\": \"Cancer biology & therapy\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — catalytic mutant in vivo model, clear functional readout\",\n      \"pmids\": [\"15326366\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"PRL-3 promotes epithelial-mesenchymal transition (EMT) by activating PI3K/Akt, inactivating GSK-3β, up-regulating mesenchymal markers (fibronectin, Snail) and down-regulating epithelial markers (E-cadherin, γ-catenin, integrin β3). PRL-3 down-regulates PTEN expression. These effects require phosphatase activity (C104S mutant abrogates them) and are blocked by PI3K inhibitor LY294002.\",\n      \"method\": \"Stable and transient transfection, phospho-specific antibodies, PI3K inhibitor, catalytic mutant\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods, catalytic mutant control, replicated across cell lines\",\n      \"pmids\": [\"17409395\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Ezrin is a direct cellular substrate of PRL-3. PRL-3 overexpression dephosphorylates Ezrin-Thr567 (and tyrosine residues) in HCT116 cells, with Thr567 identified as the primary target. In vitro dephosphorylation assays confirm Ezrin-Thr567 as a direct substrate and establish PRL-3 as a dual-specificity phosphatase.\",\n      \"method\": \"Phosphoproteomic profiling, RNA interference, in vitro dephosphorylation assay, catalytic mutant comparison\",\n      \"journal\": \"Biochimica et biophysica acta\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro dephosphorylation assay with RNAi validation, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"18078820\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"Integrin α1 is a PRL-3-interacting protein identified by yeast two-hybrid screen and verified by pull-down and co-immunoprecipitation. PRL-3 down-regulates tyrosine phosphorylation of integrin β1 and increases ERK1/2 phosphorylation.\",\n      \"method\": \"Yeast two-hybrid screen, pull-down assay, co-immunoprecipitation, Western blot\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — Co-IP and pull-down confirmed, single lab, two complementary methods\",\n      \"pmids\": [\"16472776\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PRL-3 associates with integrin β1 (co-immunoprecipitation) and its expression positively correlates with ERK1/2 phosphorylation. siRNA depletion of integrin β1 abrogates PRL-3-induced ERK1/2 activation and blocks PRL-3-induced motility and invasion. PRL-3 promotes MMP2 gelatinolytic activity and reduces TIMP2 expression, mediating invasion downstream of integrin β1-ERK1/2 signaling.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown, transwell assay, gelatin zymography, ERK inhibitor (U0126), nude mouse lung metastasis model\",\n      \"journal\": \"Molecular cancer\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP, epistasis by siRNA knockdown, in vitro and in vivo validation, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"19930715\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PRL-3 interacts with and dephosphorylates keratin 8 (KRT8) at S73 and S431. PRL-3 and KRT8 co-localize at cellular lamellipodia and ruffles in vivo. This interaction requires PRL-3 phosphatase activity (C104S mutant and PRL-3 inhibitor block KRT8 dephosphorylation). Reduction in KRT8 phosphorylation is observed at invasive front and liver metastases in colorectal cancer tissue.\",\n      \"method\": \"Phosphoprotein expression profiling, co-immunoprecipitation, colocalization, PRL-3 inhibitor, catalytic mutant (C104S)\",\n      \"journal\": \"International journal of cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with colocalization and catalytic mutant control, single lab\",\n      \"pmids\": [\"19115206\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"PRL-3 possesses enzymatic phosphatase activity (demonstrated by cleavage of 6,8-difluoro-4-methylumbelliferyl phosphate substrate), which is inhibited by vanadate. Catalytically inactive C104S mutant fails to inhibit angiotensin II-induced calcium mobilization, while wild-type PRL-3 inhibits it. Wild-type PRL-3 promotes dephosphorylation of p130cas in response to AngII.\",\n      \"method\": \"Purified recombinant enzyme activity assay, HEK293 transfection, FLIPR calcium assay, Western blot with phospho-specific antibodies\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro enzymatic assay with catalytic mutant, cellular functional validation, single lab\",\n      \"pmids\": [\"11355880\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"PCBP1 suppresses PRL-3 protein expression post-transcriptionally by binding to triple GCCCAG motifs in the 5' UTR of PRL-3 mRNA and retarding its incorporation into polyribosomes. PCBP1 overexpression inhibits PRL-3 expression and inactivates AKT; PCBP1 knockdown causes PRL-3 upregulation and AKT activation.\",\n      \"method\": \"5' UTR mutational analysis, polyribosome fractionation, RNA-protein binding assay, PCBP1 overexpression/knockdown\",\n      \"journal\": \"Cancer cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (polyribosome fractionation, mutational analysis, gain/loss-of-function), independent clinical validation\",\n      \"pmids\": [\"20609352\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"PRL-3 shows phosphatase activity toward the phosphoinositide PI(4,5)P2 in vitro (demonstrated by two complementary biochemical assays), suggesting it is a phosphatidylinositol 5-phosphatase. Wild-type PRL-3 does not dephosphorylate tested phosphopeptides. The C104S mutant is structurally destabilized and cannot promote cell migration; the hyperactive A111S mutant is inactive against PIPs and also cannot promote migration. Correlation between PI(4,5)P2 dephosphorylation activity and cell migration phenotype across mutants supports PI(4,5)P2 as a functionally relevant substrate.\",\n      \"method\": \"In vitro phosphoinositide dephosphorylation assays (two complementary biochemical methods), molecular docking, stable HEK293 cell lines, migration assay\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro assay with multiple mutants and two complementary methods, phenotypic correlation, single lab\",\n      \"pmids\": [\"21806020\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Prl-3 is a p53 transcriptional target gene. Prl-3 overexpression induces G1 cell-cycle arrest downstream of p53 via PI3K-Akt-activated negative feedback. Loss of Prl-3 expression also induces cell-cycle arrest, indicating that basal Prl-3 is required for normal cell-cycle progression.\",\n      \"method\": \"Reporter assays for p53 transcriptional activation, PI3K inhibitor epistasis, cell-cycle analysis by FACS, gain/loss-of-function\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (transcriptional assay, pharmacological epistasis, flow cytometry), single lab\",\n      \"pmids\": [\"18471976\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"PRL-3 induces hyperactivation of EGFR and its downstream cascades by transcriptionally downregulating PTP1B (an inhibitory phosphatase for EGFR), thereby creating cellular addiction to EGFR signaling. Loss of PTP1B mediates PRL-3's EGFR activation effect.\",\n      \"method\": \"Multiple human cancer cell lines, PTP1B knockdown/rescue, phospho-EGFR Western blot, gene expression analysis\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple cell lines, mechanistic epistasis (PTP1B knockdown), replicated across cancer types\",\n      \"pmids\": [\"23867504\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"USP4 (ubiquitin-specific protease 4) physically interacts with PRL-3 and stabilizes it via deubiquitination. USP4 knockdown reduces PRL-3 protein levels; USP4 overexpression increases PRL-3 stability. This stabilization leads to AKT activation and E-cadherin reduction.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay, siRNA knockdown, Western blot\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with functional deubiquitination assay, single lab\",\n      \"pmids\": [\"26669864\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"PRL-3 interacts with stathmin (co-immunoprecipitation in cell lines and tissues), and both contribute to microtubule destabilization in colorectal cancer cells.\",\n      \"method\": \"Proteomic screen, co-immunoprecipitation in cell lines and CRC tissue, microtubule stability assay\",\n      \"journal\": \"Journal of proteome research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — Co-IP confirmed in endogenous setting and clinical tissue, single lab\",\n      \"pmids\": [\"20806969\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"TGFβ suppresses PRL-3 transcription through Smad-dependent inhibition at the PRL-3 promoter. PRL-3 activates PI3K/AKT signaling to promote cell survival against stress-induced apoptosis, mediating metastatic colonization independently of primary tumor growth.\",\n      \"method\": \"Promoter-luciferase reporter assays, Smad knockdown, PI3K inhibitor, orthotopic mouse metastasis model, siRNA knockdown\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — promoter assay with epistasis and in vivo validation, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"21084277\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"PRL-3 is a downstream target of FLT3-STAT5 signaling in AML; FLT3 inhibition (ABT-869) reduces PRL-3 expression. PRL-3 interacts with HDAC4 (co-immunoprecipitation). SAHA (HDAC inhibitor) downregulates PRL-3 via a proteasome-dependent pathway. Ectopic PRL-3 expression confers therapeutic resistance through upregulation of STAT pathway activity and anti-apoptotic Mcl-1.\",\n      \"method\": \"Co-immunoprecipitation (PRL-3-HDAC4), siRNA knockdown, FLT3 inhibitor treatment, proteasome inhibitor, STAT pathway Western blot\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with pharmacological and genetic epistasis, single lab\",\n      \"pmids\": [\"21589872\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"PRL-3-expressing tumor cells reduce IL-4 expression, attenuating IL-4's inhibitory effects on HUVEC vasculature, and directly recruit endothelial cells and initiate angiogenesis in vivo. Both CHO and DLD-1 cells expressing PRL-3 redirect HUVEC migration and enhance vascular formation.\",\n      \"method\": \"In vitro co-culture system with HUVECs, in vivo tumor implantation in nude mice with host endothelial cell recruitment, IL-4 assay\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro and in vivo experiments with mechanistic IL-4 link, single lab\",\n      \"pmids\": [\"17018620\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"PTP4A3-null endothelial cells exhibit severely reduced VEGF-stimulated migration. VEGF-induced Src phosphorylation is completely ablated in Ptp4a3-null endothelial cells, placing PTP4A3 as a required mediator in VEGF-Src signaling in endothelial cells. Ptp4a3-null mice show reduced tumor microvessel density and attenuated VEGF-mediated vascular permeability.\",\n      \"method\": \"Ptp4a3 knockout mouse model, primary endothelial cell isolation, VEGF stimulation, phospho-Src Western blot, wound healing assay, in vivo vascular permeability assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic knockout with primary cells, in vivo and ex vivo validation, multiple orthogonal readouts\",\n      \"pmids\": [\"24403062\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"PTP4A3 deletion from murine colorectal tumor cells impairs colony formation, spheroid formation, migration, adherence, and increases expression of the extracellular matrix tumor suppressor Emilin1. These phenotypes are recapitulated by the allosteric small-molecule PTP4A3 inhibitor JMS-053 in a PTP4A3-expression-dependent manner.\",\n      \"method\": \"CRISPR/gene-targeted Ptp4a3 knockout in murine tumor cells, JMS-053 inhibitor, gene expression analysis, colony/spheroid/migration assays\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic knockout confirmed by pharmacological inhibitor, multiple orthogonal phenotypic assays, single rigorous study\",\n      \"pmids\": [\"29746167\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"VEGF induces PRL-3 transcription in HUVECs through the transcription factor MEF2C acting on two functional MEF2 binding sites in the PRL-3-iso2 promoter. MEF2C knockdown abolishes VEGF-induced PRL-3 upregulation. PRL-3 blocking suppresses tube formation by HUVECs.\",\n      \"method\": \"5'UTR mapping, promoter-luciferase reporter with MEF2 site mutations, MEF2C siRNA, MEF2C overexpression, tube formation assay\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — promoter assay with mutagenesis and siRNA epistasis, single lab\",\n      \"pmids\": [\"22073279\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"PRL-3 interacts with ADP-ribosylation factor 1 (Arf1), co-localizes with Arf1 in an endosomal compartment, and regulates Arf1 activation. PRL-3-mediated cell migration depends on Arf1 expression and activation and is sensitive to Brefeldin A. PRL-3 modulates recycling of α5 integrins, requiring phosphatase activity and Arf1 co-compartmentalization.\",\n      \"method\": \"Co-immunoprecipitation, colocalization, Arf1 knockdown, Brefeldin A treatment, integrin recycling assay, catalytic mutant\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with functional epistasis and integrin recycling assay, single lab\",\n      \"pmids\": [\"22595524\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"PRL-3 activates NF-κB signaling by interacting with the telomere-associated protein RAP1. PRL-3 promotes cytosolic localization of RAP1, enhances phosphorylation of the p65 NF-κB subunit in a RAP1-dependent manner, and transcriptionally activates RAP1 in a p65-dependent manner, forming a positive feedback loop.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown of RAP1, microarray analysis, p65 phosphorylation Western blot, colon cancer tissue array\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with epistasis by RAP1 silencing and clinical tissue validation, single lab\",\n      \"pmids\": [\"23178297\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PRL-3 interacts with CDH22 (a cadherin family member), identified by yeast two-hybrid and confirmed by GST pull-down, Co-IP, and colocalization. PRL-3 inactivates GSK-3β (by phosphorylation), increases Snail expression, and promotes vimentin upregulation/E-cadherin downregulation consistent with EMT.\",\n      \"method\": \"Yeast two-hybrid, GST pull-down, Co-IP, colocalization, phospho-specific antibodies, GSK-3β inhibitor lithium chloride\",\n      \"journal\": \"Cancer biology & therapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — yeast two-hybrid confirmed by pull-down and Co-IP, single lab\",\n      \"pmids\": [\"19440036\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Nuclear PRL-3 is observed in colorectal cancer cells and regulates histone H3K9 methylation by affecting the activities of the histone demethylases JMJD1B and JMJD2B, which are enriched among PRL-3-associated proteins.\",\n      \"method\": \"Subcellular fractionation/immunofluorescence (nuclear PRL-3), siRNA knockdown of JMJD1B/JMJD2B, histone methylation Western blot, proteomic association analysis\",\n      \"journal\": \"Gut\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct nuclear localization confirmed, functional histone methylation assay with siRNA, single lab\",\n      \"pmids\": [\"22345654\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"FKBP38 directly binds PRL-3 (yeast two-hybrid and confirmed in vivo by Co-IP; N-terminal region of FKBP38 required for binding). FKBP38 overexpression reduces endogenous PRL-3 via proteasome-dependent degradation; FKBP38 depletion increases PRL-3 protein. FKBP38 suppresses PRL-3-mediated p53 activity and cell proliferation.\",\n      \"method\": \"Yeast two-hybrid, Co-IP, FKBP38 overexpression/siRNA, proteasome inhibitor, proliferation assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — yeast two-hybrid confirmed by Co-IP with gain/loss-of-function, single lab\",\n      \"pmids\": [\"21320469\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Targeted genetic deletion of Ptp4a3 in mice reduces colon tumor formation by ~50% in the azoxymethane/dextran sodium sulfate colitis-associated cancer model. Ptp4a3-null tumors show elevated IGF1Rβ and c-MYC levels compared to wildtype tumors.\",\n      \"method\": \"Gene-targeted Ptp4a3 knockout mouse, AOM/DSS colon cancer model, qPCR, Western blot\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — definitive genetic knockout model with quantitative tumor phenotype, mechanistic follow-up\",\n      \"pmids\": [\"23555575\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"PRL-3 accumulates in autophagosomes upon inhibition of autophagic degradation and enhances PIK3C3-BECN1-dependent autophagosome formation in an ATG5-dependent manner. PRL-3's promotion of autophagy requires both catalytic activity and prenylation-dependent membrane association. PRL-3 itself becomes an autophagic substrate, establishing a negative feedback loop. Autophagy pathway is used by PRL-3 to promote cell growth with concomitant AKT activation.\",\n      \"method\": \"Autophagosome isolation/co-localization, LC3-I/II conversion assay, ATG5 knockdown, catalytic and prenylation mutants, SQSTM1 degradation assay\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods with mutant validation, single lab\",\n      \"pmids\": [\"25136802\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"PRL-3 dephosphorylates NHERF1 at a serine site, triggering NHERF1 cytoplasmic translocation. This co-translocates PTEN from nucleus to cytoplasm, reducing nuclear PTEN and elevating AKT phosphorylation, promoting melanoma malignant progression.\",\n      \"method\": \"Phosphorylation analysis, subcellular fractionation, co-localization imaging, siRNA knockdown, in vivo tumor model\",\n      \"journal\": \"The Journal of investigative dermatology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — phosphorylation/localization data with in vivo validation, single lab\",\n      \"pmids\": [\"25897829\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"PRL-3 increases mTOR translocation to lysosomes via increased mTOR binding affinity to Rag GTPases in an Akt-independent manner, and also activates mTORC1 via PI3K/Akt-mediated TSC2 suppression/Rheb-GTP activation, leading to downstream p70S6K and 4E-BP1 phosphorylation and increased MMP-2 secretion and invasiveness.\",\n      \"method\": \"mTOR lysosomal localization by immunofluorescence, Rag GTPase co-immunoprecipitation, Akt inhibitor, rapamycin treatment, invasion assay, multiple cancer models\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple mechanistic experiments in one lab with pharmacological epistasis\",\n      \"pmids\": [\"26597054\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"PRL-3 mediates protein maturation of the NKG2D ligand ULBP2 by regulating tyrosine phosphorylation of HSP60, which constitutively associates with ULBP2. PRL-3 inhibition/knockdown blocks posttranslational maturation of ULBP2, causing intracellular retention, rather than affecting its shedding.\",\n      \"method\": \"High-throughput screening for PRL-3 inhibitors, siRNA knockdown, co-immunoprecipitation (ULBP2-HSP60), phospho-tyrosine Western blot, flow cytometry\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with siRNA validation and mechanistic HSP60 phosphorylation link, single lab\",\n      \"pmids\": [\"25687758\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PRL-3 promotes epithelial lumen disruption and ectopic lumen formation in polarized epithelial MDCK and Caco2 cysts by accelerating cytokinesis and causing midbody mispositioning, without altering mitotic spindle orientation or asymmetric abscission.\",\n      \"method\": \"3D cyst culture, time-lapse microscopy, cytokinesis timing measurement, spindle orientation assay, midbody localization analysis, catalytic mutant comparison\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — live imaging with multiple mechanistic controls and 3D model, single lab\",\n      \"pmids\": [\"27656108\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"PRL-3 interacts with integrin β1 and FAK-pY397 in focal adhesion structures (co-immunoprecipitation). PRL-3 plasma membrane anchorage (via CAAX prenylation) is required for PRL-3-induced migration; a prenylation-deficient mutant abolishes migration. PRL-3 dephosphorylates integrin β1 in its intracytoplasmic S/T region and regulates integrin β1 clustering in focal adhesions on collagen I but not fibronectin.\",\n      \"method\": \"Co-immunoprecipitation, integrin β1 knockdown, prenylation mutant, phosphorylation analysis, confocal imaging of focal adhesions, migration assay\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with multiple mutant controls, single lab\",\n      \"pmids\": [\"28284838\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"PRL-3 promotes telomere deprotection and chromosomal instability through its association with the shelterin component RAP1, which mediates PRL-3 recruitment to telomeric DNA along with TRF2. PRL-3 overexpression dissociates RAP1 and TRF2 from telomeric DNA in vitro and in cells. Disruption of the PRL-3-RAP1 complex or ectopic TRF2 counteracts PRL-3-induced telomere deprotection.\",\n      \"method\": \"Co-immunoprecipitation (RAP1, TRF2), ChIP at telomeres, in vitro DNA-protein dissociation assay, PRL-3 transgenic mice, DSS-induced colon malignancy model\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro and in vivo experiments with transgenic mouse and rescue experiments, single lab\",\n      \"pmids\": [\"28482095\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"PRL-3 dephosphorylates FZR1 (a regulatory subunit of APC/C), facilitating APC/C(FZR1) complex assembly, which leads to enhanced ubiquitination and degradation of Aurora kinase A (AURKA). This PRL-3-FZR1-AURKA axis promotes G2-M arrest, chromosomal instability, and self-renewal in colorectal cancer. PRL-3 physically interacts with both AURKA and FZR1.\",\n      \"method\": \"Co-immunoprecipitation (PRL-3-AURKA, PRL-3-FZR1), ubiquitination assay, phosphatase-dead mutant, FZR1 phosphorylation Western blot, APC/C activity assay, xenograft model\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro dephosphorylation combined with Co-IP, ubiquitination assay, and rescue by ectopic AURKA, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"30498084\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"PRL-3 dephosphorylates Leo1 (a component of the PAF complex) on serine residues. Serine-dephosphorylated Leo1 binds directly to β-catenin, promoting nuclear β-catenin accumulation and TCF/LEF target gene transactivation (cyclin D1, c-myc) in AML.\",\n      \"method\": \"SILAC proteomics, Co-IP (Leo1 identified as direct PRL-3 substrate), phosphorylation assay, β-catenin nuclear localization, TCF/LEF reporter assay, in vitro and in vivo rescue experiments\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — substrate identification by proteomics confirmed by phosphorylation assay, Co-IP, and functional rescue, single rigorous study\",\n      \"pmids\": [\"30305722\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"PRL-3 overexpression in AML increases JMJD2C histone demethylase occupancy on the Leo1 promoter, reducing H3K9me3 repressive marks and promoting Leo1 gene expression. Leo1 mediates PRL-3 oncogenic activities (cytokine-independent growth) and loss of Leo1 destabilizes the PAF complex and downregulates SOX2/SOX4.\",\n      \"method\": \"SILAC proteomics, ChIP (JMJD2C and H3K9me3 at Leo1 promoter), siRNA knockdown, cytokine-independence assay\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP with proteomic and functional validation, single lab\",\n      \"pmids\": [\"24686170\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PRL-3 phosphatase activity dependently upregulates LIN28B, which represses the let-7 miRNA family and induces a stem cell-like transcriptional program in AML cells. This PRL-3/LIN28B/let-7 axis is required for leukemogenesis in vitro and in vivo.\",\n      \"method\": \"Catalytic mutant comparison, LIN28B expression analysis, let-7 miRNA measurement, xenograft mouse model\",\n      \"journal\": \"Molecular cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — catalytic mutant with in vivo model, single lab\",\n      \"pmids\": [\"28011885\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"NSD2 interacts with SMARCA2 (SWI/SNF ATPase) in a non-canonical, SWI/SNF complex-independent manner. The NSD2-SMARCA2 complex binds the PTP4A3 promoter, increases the permissive H3K36me2 histone mark, and transcriptionally activates PTP4A3 expression in t(4;14) multiple myeloma.\",\n      \"method\": \"SILAC mass spectrometry, Co-IP (NSD2-SMARCA2), ChIP (H3K36me2 at PTP4A3 promoter), RNA sequencing, BET inhibitor PFI-3 displacement experiment, xenograft model\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — SILAC-confirmed interaction, ChIP validation, pharmacological displacement, in vivo model, multiple orthogonal methods\",\n      \"pmids\": [\"33602783\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"The C-terminal CAAX motif of PRL-3, beyond directing farnesylation, plays an additional regulatory role by inhibiting the catalytic efficiency of PRL-3 in vitro. Truncation and mutation analysis invalidates the hypothesis that the C-terminal polybasic sequence is a nuclear localization signal.\",\n      \"method\": \"Truncated and mutant PRL-3 forms, in vitro phosphatase activity assay, subcellular localization analysis\",\n      \"journal\": \"Journal of cellular and molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — in vitro enzymatic assay with mutagenesis, single lab, limited follow-up\",\n      \"pmids\": [\"19040419\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PRL-3 promotes TNBC cell invasion by upregulating matrix metalloproteinase 10 (MMP10), increases TNBC cell adherence to laminin via focal adhesion pathway engagement (Src, ERK, RhoA, Rac1/2/3 GTPase). Loss of PRL-3 deactivates Src and ERK signaling and rearranges F-actin networks.\",\n      \"method\": \"PRL-3 knockdown/overexpression, Western blot (Src, ERK, RhoA, Rac1/2/3), invasion assay, adhesion assay, MMP10 analysis, F-actin staining\",\n      \"journal\": \"Cancer letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function and gain-of-function with multiple signaling readouts, single lab\",\n      \"pmids\": [\"27452906\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"PRL-3 is downstream of BCR-ABL signaling in CML; inhibition of BCR-ABL by imatinib or BCR-ABL siRNA reduces PRL-3 expression. PRL-3 is required for CML cell proliferation and self-renewal. In imatinib-resistant P210 T315I cells, PRL-3 levels are maintained or increased despite BCR-ABL inhibition.\",\n      \"method\": \"BCR-ABL siRNA, imatinib treatment, PRL-3 shRNA, proliferation and self-renewal assays, Western blot\",\n      \"journal\": \"Molecular cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic and pharmacological epistasis, single lab\",\n      \"pmids\": [\"22995644\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"PTP4A3/PRL-3 dephosphorylates CRMP2 on T514. Inhibition of CRMP2 expression in PTP4A3-expressing uveal melanoma cells increases migration and invasiveness, accompanied by shortened actin filaments and increased cytoplasmic stiffness. The inactive phosphatase mutant does not recapitulate these actin/stiffness changes.\",\n      \"method\": \"Phosphorylation analysis (CRMP2-T514), siRNA knockdown, catalytic mutant, in vitro migration/invasion, AFM cell stiffness measurement, in vivo xenograft\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — phosphorylation change with catalytic mutant and functional validation, single lab\",\n      \"pmids\": [\"30816227\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PTP4A3 increases cell membrane accumulation of MMP14 by accelerating vesicular trafficking of MMP14. PTP4A3 and MMP14 co-localize and MMP14 vesicular trafficking is faster in the presence of catalytically active PTP4A3. Inhibition of MMP14 expression in PTP4A3-expressing uveal melanoma cells impairs migration and invasiveness.\",\n      \"method\": \"Flow cytometry of cell surface MMP14, immunofluorescence colocalization, MMP14 vesicular trafficking assay with active vs. inactive PTP4A3, MMP14 siRNA knockdown, in vivo invasiveness assay\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — trafficking assay with active/inactive mutant comparison, siRNA epistasis, single lab\",\n      \"pmids\": [\"27096756\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"PRL-3 directly dephosphorylates p38 MAPK under stress conditions (CoCl2-induced hypoxia, UV, H2O2, and hypoxia), promoting cell survival and apoptosis resistance. This requires catalytic activity (C104S mutant fails to confer resistance). In vivo, cells expressing PRL-3 show higher metastatic burden and lower p38 MAPK phosphorylation.\",\n      \"method\": \"In vitro dephosphorylation assay (PRL-3 + p38 MAPK), catalytic mutant, apoptosis assay under multiple stress conditions, mouse lung metastasis model, phospho-p38 Western blot\",\n      \"journal\": \"Free radical biology & medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro dephosphorylation assay with catalytic mutant and multiple stress conditions plus in vivo validation, single lab\",\n      \"pmids\": [\"34662712\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Ptp4a3-null colitis-associated colon cancer cells exhibit reduced clonogenicity and fail to form secondary tumors in nude mice, while wild-type Ptp4a3-expressing CD133+ tumor-initiating cells readily form secondary tumors, demonstrating PTP4A3's role in tumor-initiating cell self-renewal.\",\n      \"method\": \"Ptp4a3 knockout mouse model, AOM/DSS-induced tumors, CD133+ cell isolation, limiting dilution clonogenicity assay, secondary tumor transplantation in nude mice\",\n      \"journal\": \"Stem cell research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic knockout in primary tumor cells with clonogenicity and in vivo tumor initiation assay\",\n      \"pmids\": [\"24950307\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"PRL-3/PTP4A3 is a prenylated, membrane-associated dual-specificity phosphatase whose catalytic activity (at Cys104) is required for its pro-metastatic functions; it dephosphorylates direct substrates including Ezrin-Thr567, CRMP2-T514, keratin 8, FZR1, Leo1, p38 MAPK, integrin β1, and phosphoinositide PI(4,5)P2, and signals through PI3K/Akt/mTORC1, NF-κB (via RAP1), EGFR (by suppressing PTP1B), and VEGF/Src pathways to promote cell migration, invasion, EMT, autophagy, angiogenesis, genomic instability, and cancer metastasis, while its expression is regulated transcriptionally by p53, TGFβ/Smad, VEGF/MEF2C, FLT3-STAT5, and NSD2-SMARCA2 chromatin remodeling, and post-transcriptionally by PCBP1 (translational suppression) and post-translationally by FKBP38 and USP4 (proteasomal stability).\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"PTP4A3 (PRL-3) is a prenylated, membrane-associated dual-specificity phosphatase whose catalytic activity at Cys104 drives pro-metastatic cellular behaviors including migration, invasion, EMT, and metastatic colonization in vivo [#2, #3, #4]. Structurally it adopts a dual-specificity phosphatase fold with an unusually hydrophobic active site whose loops are conformationally flexible until stabilized by substrate or vanadate binding, and its C-terminal CAAX motif both directs prenylation-dependent plasma membrane anchoring required for migration and modulates catalytic efficiency [#0, #1, #33, #40]. PRL-3 dephosphorylates a range of direct substrates that converge on cytoskeletal and adhesion remodeling — Ezrin-Thr567, keratin 8, integrin \\u03b21, CRMP2-T514, and the phosphoinositide PI(4,5)P2 — linking its activity to lamellipodial dynamics, focal-adhesion turnover, and directed cell movement [#5, #8, #11, #33, #43]. A central output is activation of PI3K/Akt signaling, achieved in part by down-regulating PTEN and NHERF1-dependent PTEN compartmentalization, feeding EMT, survival, and mTORC1 activation [#4, #29, #30]; PRL-3 additionally suppresses PTP1B to hyperactivate EGFR, engages integrin \\u03b21\\u2013ERK1/2 and VEGF\\u2013Src axes, and activates NF-\\u03baB through RAP1 [#13, #7, #19, #23]. Beyond the cytoplasm, nuclear PRL-3 promotes genomic instability by dephosphorylating FZR1 to drive APC/C-mediated AURKA degradation and by displacing the shelterin proteins RAP1/TRF2 from telomeres, and it dephosphorylates the PAF-complex subunit Leo1 to activate \\u03b2-catenin/TCF transcription in leukemia [#35, #34, #36]. PRL-3 dephosphorylates p38 MAPK to confer stress and apoptosis resistance and supports tumor-initiating cell self-renewal in vivo [#45, #46]. Its expression is tightly controlled — transcriptionally by p53, TGF\\u03b2/Smad, VEGF/MEF2C, and NSD2-SMARCA2 chromatin remodeling, translationally by PCBP1, and post-translationally by FKBP38 and USP4 governing proteasomal stability [#12, #16, #21, #39, #10, #26, #14].\",\n  \"teleology\": [\n    {\n      \"year\": 2001,\n      \"claim\": \"Establishing that PRL-3 is a bona fide enzyme answered whether the protein had intrinsic catalytic activity and tied that activity to a cellular signaling output.\",\n      \"evidence\": \"Recombinant phosphatase activity assay inhibited by vanadate, plus C104S mutant in HEK293 calcium/p130cas assays\",\n      \"pmids\": [\"11355880\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No physiological substrate identified at this stage\", \"Cellular readouts were indirect\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Solution structures defined PRL-3 as a dual-specificity phosphatase and revealed an unusual hydrophobic, conformationally dynamic active site with a potential redox-regulatory disulfide, framing the enzymatic basis of its activity.\",\n      \"evidence\": \"NMR solution structures of apo and phosphate/vanadate-bound states with kinetic mutant analysis\",\n      \"pmids\": [\"14704153\", \"15135076\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structure alone did not define endogenous substrates\", \"Redox regulation not demonstrated in cells\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Linking catalytic activity to metastasis answered whether PRL-3's phosphatase function is causally required for malignant dissemination, not merely correlated.\",\n      \"evidence\": \"WT vs C104S PRL-3 stable CHO lines in transwell assays and tail-vein mouse metastasis models\",\n      \"pmids\": [\"12782572\", \"15326366\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Substrates mediating the phenotype unknown at this point\", \"Mechanism of membrane association not defined\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Identification of direct substrates (Ezrin-Thr567, keratin 8, integrin \\u03b21) connected catalytic activity to specific cytoskeletal and adhesion targets driving motility.\",\n      \"evidence\": \"Phosphoproteomics, in vitro dephosphorylation, Co-IP, colocalization, and siRNA epistasis with catalytic mutant controls\",\n      \"pmids\": [\"18078820\", \"19115206\", \"16472776\", \"19930715\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relative contribution of each substrate to metastasis not ranked\", \"Substrate selectivity determinants not defined\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Demonstrating phosphatase activity toward PI(4,5)P2 expanded PRL-3's substrate repertoire to lipids and correlated lipid activity with migration across mutants.\",\n      \"evidence\": \"Two complementary in vitro phosphoinositide assays, docking, and migration assays with multiple mutants\",\n      \"pmids\": [\"21806020\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo phosphoinositide dephosphorylation not shown\", \"Tension with protein-substrate findings unresolved\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Mapping PRL-3 onto PI3K/Akt, EGFR, and PTEN axes explained how phosphatase activity is amplified into broad oncogenic signaling and EMT.\",\n      \"evidence\": \"PTP1B knockdown/rescue across cancer lines, PI3K inhibitor epistasis, EMT marker profiling\",\n      \"pmids\": [\"17409395\", \"23867504\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct substrate linking PRL-3 to PTP1B transcription not identified\", \"Quantitative pathway hierarchy unclear\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Genetic knockout models established PTP4A3 as physiologically required for tumor formation, tumor-initiating cell self-renewal, and VEGF-driven angiogenesis.\",\n      \"evidence\": \"Ptp4a3-null mice in AOM/DSS colon cancer, CD133+ clonogenicity/transplantation, and VEGF-Src endothelial signaling assays\",\n      \"pmids\": [\"23555575\", \"24950307\", \"24403062\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Substrates mediating self-renewal not fully defined\", \"Endothelial Src substrate not identified\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Nuclear and chromatin-linked functions answered how PRL-3 promotes genomic instability and stemness, via FZR1/APC/C-AURKA, telomeric RAP1/TRF2 displacement, and Leo1/\\u03b2-catenin signaling.\",\n      \"evidence\": \"Co-IP, ubiquitination and APC/C activity assays, telomeric ChIP and in vitro dissociation, SILAC proteomics with rescue and xenograft models\",\n      \"pmids\": [\"30498084\", \"28482095\", \"30305722\", \"24686170\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How a prenylated membrane phosphatase accesses telomeric/nuclear substrates not mechanistically resolved\", \"Coordination between nuclear and cytoplasmic pools unclear\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Layered regulation of PTP4A3 expression — chromatin (NSD2-SMARCA2), transcription factors, translation (PCBP1), and protein stability (FKBP38, USP4) — explained how its oncogenic dosage is set.\",\n      \"evidence\": \"SILAC/Co-IP, promoter ChIP and reporter assays, polyribosome fractionation, deubiquitination and degradation assays across cancer models\",\n      \"pmids\": [\"33602783\", \"20609352\", \"26669864\", \"21320469\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Integration of multiple regulatory inputs in a single context not modeled\", \"Upstream cues selecting each mode unclear\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How PRL-3 selects among its diverse protein and lipid substrates in different subcellular compartments, and which substrate set dominates clinically relevant metastasis, remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unifying model reconciling lipid-phosphatase and protein-phosphatase activities\", \"Compartment-specific substrate prioritization unknown\", \"No human Mendelian disease link established in this corpus\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [5, 8, 35, 36, 43, 45]},\n      {\"term_id\": \"GO:0016787\", \"supporting_discovery_ids\": [9, 0, 11]},\n      {\"term_id\": \"GO:0008289\", \"supporting_discovery_ids\": [11]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [2, 33]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [25, 34]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [22]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [8, 15]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [4, 13, 23, 30]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [2, 3, 27, 46]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [12, 35]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [28]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [25, 36, 39]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"ITGB1\", \"RAP1\", \"FZR1\", \"AURKA\", \"USP4\", \"FKBP38\", \"ARF1\", \"HDAC4\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}