{"gene":"DYNLL1","run_date":"2026-06-09T23:54:42","timeline":{"discoveries":[{"year":1999,"finding":"Crystal structure of PIN/LC8 (DYNLL1) dimer reveals two monomers forming a rectangular dimer with two pairs of alpha-helices covering opposite faces, each packing against a five-stranded antiparallel beta-sheet (four strands from one monomer, one from the other). A 13-residue nNOS peptide binds in a deep hydrophobic groove at the dimer interface as a sixth antiparallel beta-strand, providing structural basis for dimerization and peptide binding.","method":"X-ray crystallography","journal":"Nature structural biology","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structure with direct functional validation of peptide binding; foundational structural paper replicated by subsequent studies","pmids":["10426949"],"is_preprint":false},{"year":2001,"finding":"LC8 (DYNLL1) exists as a reversible monomer-dimer equilibrium with a dissociation constant of ~12 µM at pH 7; dimerization is pH-dependent, with dissociation to monomer below pH ~4.8, attributable to titration of a histidine pair at the dimer interface. Unfolding is a two-stage process: dimer dissociation to folded monomer precedes global unfolding.","method":"Analytical ultracentrifugation, size-exclusion chromatography, circular dichroism, fluorescence spectroscopy","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Strong — multiple orthogonal biophysical methods in a single rigorous study establishing dimerization mechanism","pmids":["11327818"],"is_preprint":false},{"year":2007,"finding":"LC8 (DYNLL1) binds peptides from both dynein intermediate chain (IC) and the Drosophila cargo protein Swallow (Swa) in the same grooves at the dimer interface; both GIQVD and KXTQT fingerprint sequences are recognized in the same groove. Swallow binds with higher affinity than IC, suggesting that LC8's binding to cargo proteins like Swallow serves a dimerization function independent of its role in dynein.","method":"X-ray crystallography, hydrogen isotope exchange NMR, isothermal titration calorimetry","journal":"Journal of molecular biology","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structures plus NMR dynamics, multiple orthogonal methods establishing shared binding groove and dimerization engine function","pmids":["17570393"],"is_preprint":false},{"year":2008,"finding":"DYNLL1 (LC8) binds IκBα and prevents its phosphorylation by IκB kinase (IKK), thereby inhibiting NF-κB activation. TNFα-induced reactive oxygen species oxidize LC8 to form an intermolecular disulfide bond between Cys2 residues, causing LC8 dissociation from IκBα. The thioredoxin-related protein TRP14 reduces oxidized LC8 to maintain its inhibitory function.","method":"Co-immunoprecipitation, in-cell NF-κB reporter assays, redox biochemistry, mutagenesis","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP, functional reporter assays, and biochemical redox mechanism established in a single study with multiple orthogonal approaches","pmids":["18579519"],"is_preprint":false},{"year":2008,"finding":"Pak1 (residues 212-222) binds DYNLL1 (LC8) in the same canonical groove as nNOS and BimL, requiring the target-binding interface formed by LC8 dimerization. In vitro phosphorylation assays show Pak1 does not phosphorylate LC8 at Ser88 (which is inaccessible in the dimer), refuting the prior model; instead LC8 binding may modulate Pak1 activity and/or nuclear localization.","method":"NMR, X-ray crystallography, biochemical LC8 point mutants (K36P, T67A), in vitro phosphorylation assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structure plus NMR plus mutagenesis plus in vitro assay in a single study; negative phosphorylation result rigorously established","pmids":["18650427"],"is_preprint":false},{"year":2008,"finding":"Phosphomimetic mutation in LC8 (DYNLL1) promotes dissociation to monomer and, by NMR backbone relaxation, the monomer shows more heterogeneous dynamics in residues forming the binding groove (beta1 and beta3 strands), suggesting dimerization pre-organizes the binding groove for ligand recognition. Peptide binding either retains (IC peptide) or silences (Swallow peptide) millisecond-microsecond dynamics in the groove, indicating ligand-specific conformational dynamics.","method":"15N NMR relaxation, equilibrium unfolding","journal":"Biochemistry","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — rigorous NMR method but single lab, no independent replication of mechanistic model","pmids":["18942858"],"is_preprint":false},{"year":2009,"finding":"LC8 (DYNLL1) binds syntaphilin (SNPH) through a seven-residue LC8-binding motif, recruits to axonal mitochondria via SNPH, and enhances the SNPH-microtubule docking interaction to reduce mitochondrial mobility. Deletion of the LC8-binding motif on SNPH abolishes colocalization and impairs SNPH's ability to immobilize mitochondria. Circular dichroism shows LC8 stabilizes an alpha-helical coiled-coil in the SNPH microtubule-binding domain.","method":"Co-immunoprecipitation, mutagenesis, time-lapse live imaging in neurons, circular dichroism, fractionation","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (Co-IP, mutagenesis, live imaging, CD) establishing mechanism of mitochondrial docking regulation by LC8","pmids":["19641106"],"is_preprint":false},{"year":2009,"finding":"LC8 (DYNLL1) interaction with Pak1 is required for EGF-induced nuclear import of Pak1 in MCF-7 cells, and this event is contingent on LC8-mediated Pak1 dimerization. Pak2, which lacks an LC8 binding site, remains cytoplasmic upon EGF stimulation. In zebrafish, developmental defects caused by Pak morpholino knockdown are partially rescued by wild-type Pak1 but not by Pak1 mutants disrupting either the LC8 binding or NLS sites.","method":"Fluorescence microscopy for nuclear import, zebrafish morpholino rescue, mutagenesis","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — live-cell localization with functional consequence, zebrafish in vivo rescue, mutagenesis; single lab","pmids":["19557173"],"is_preprint":false},{"year":2011,"finding":"ASCIZ (ATMIN/ZNF822) is a transcriptional activator of the Dynll1 gene; DYNLL1 levels are reduced ~10-fold in ASCIZ-deficient human, mouse, and chicken cells. ASCIZ binds directly to the Dynll1 promoter in a Zn-finger-dependent manner. DYNLL1 protein in turn interacts with ten binding sites in the ASCIZ transcription activation domain, and high DYNLL1 levels inhibit ASCIZ transcriptional activity, forming a feedback loop. DYNLL1 is also required for DNA-damage-induced ASCIZ focus formation.","method":"ChIP, promoter reporter assay, co-IP, cell-based transcription assays across three cell types","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (ChIP, reporter, co-IP) replicated across human/mouse/chicken cells establishing transcriptional feedback mechanism","pmids":["22167198"],"is_preprint":false},{"year":2011,"finding":"LC8 (DYNLL1) binds Nek9 via a (K/R)XTQT motif adjacent to the Nek9 C-terminal coiled coil, causing Nek9 multimerization and increased Nek9 autoactivation. LC8 binding is regulated by Nek9 autophosphorylation on Ser944 immediately N-terminal to the motif. LC8 bound to Nek9 interferes with Nek9's interaction with its downstream partner Nek6 and with Nek6 activation, thus controlling signal transduction through the Nek9/Nek6/7 spindle kinase module.","method":"Co-immunoprecipitation, kinase activity assays, mutagenesis, size-exclusion chromatography","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP, kinase assay, mutagenesis; multiple functional readouts in one study","pmids":["21454704"],"is_preprint":false},{"year":2011,"finding":"LC8 (DYNLL1) binds to multiple SQ/TQ motifs in the C-terminal domain of ATMIN/ASCIZ; co-expression of mCherry-DYNLL1 and GFP-ATMIN mutually affects intracellular protein localization, and DYNLL1 partially impedes DNA damage-induced ATMIN nuclear foci formation.","method":"Yeast two-hybrid, pepscan, NMR-modelled complexes, co-expression localization imaging","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — yeast two-hybrid, in vitro binding, and cell imaging; partially supported by the PMID:22167198 study","pmids":["21971545"],"is_preprint":false},{"year":2012,"finding":"DYNLL1 (LC8) regulates B cell development downstream of ASCIZ: ASCIZ-deficient B cell precursors have highly reduced DYNLL1 levels, and ectopic Dynll1 expression restores normal B cell development. The B cell lymphopenia caused by ASCIZ absence can be fully suppressed by deletion of the proapoptotic DYNLL1 target Bim, placing DYNLL1 upstream of Bim-dependent apoptosis in developing B cells.","method":"Genetic rescue (ectopic Dynll1 expression), genetic epistasis (Bim knockout), flow cytometry of B cell populations in mice","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic epistasis with multiple rescue conditions across mouse models establishing pathway position","pmids":["22891272"],"is_preprint":false},{"year":2012,"finding":"LC8 (DYNLL1) binds tubulin, promotes microtubule assembly in vitro, and stabilizes microtubules in Drosophila embryos and HeLa cells. LC8 overexpression increases microtubule acetylation and resistance to cold/nocodazole-induced depolymerization; LC8 knockdown or inhibitory peptides destabilize microtubules, inhibit bipolar spindle assembly, and cause mitotic block in HeLa cells.","method":"In vitro microtubule assembly assay, immunofluorescence in Drosophila embryos and HeLa cells, siRNA knockdown, overexpression, molecular docking","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro assay plus cell biological validation across two model systems; single lab","pmids":["23038268"],"is_preprint":false},{"year":2013,"finding":"Crystal structures of DYNLL1 (LC8) bound to Nek9 binding region peptides with and without phosphorylation on Ser944 reveal that phosphorylation of Ser944 (immediately N-terminal to the KXTQT motif) sterically and electrostatically reduces binding affinity of Nek9 to LC8, providing a structural mechanism for phosphorylation-regulated LC8-partner complex formation.","method":"X-ray crystallography, isothermal titration calorimetry, biophysical binding assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structures with and without phosphorylation plus quantitative binding measurements; single lab but two orthogonal methods","pmids":["23482567"],"is_preprint":false},{"year":2013,"finding":"LC8 (DYNLL1) inhibits RANKL-induced osteoclast differentiation, actin ring formation, and bone resorption by binding IκBα and preventing its phosphorylation and degradation, thereby suppressing NF-κB activation. LC8 also inhibits RANKL-induced JNK and ERK activation and downstream c-Fos and NFATc1 expression. LC8-transgenic mice show a mild osteopetrotic phenotype.","method":"Osteoclast differentiation assays, Western blotting, transgenic mouse phenotyping, ovariectomy bone loss model","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional cell assays with pathway readouts plus in vivo mouse model; single lab, builds on earlier mechanistic work (PMID:18579519)","pmids":["23293355"],"is_preprint":false},{"year":2014,"finding":"DYNLL1 (LC8) mediates oligomerization of the Ana2 centriole duplication factor by binding two LC8-binding sites within Ana2; site 1 contains a TQT motif (Kd ~1.1 µM) and site 2 a TQC motif (Kd ~13 µM). Crystal structures show the Ana2 peptides form beta-strands extending a central LC8 beta-sandwich. LC8 dimers binding two Ana2 sites induce Ana2 tetramerization, yielding an Ana2M4-LC88 complex.","method":"X-ray crystallography (two independent structures), size-exclusion chromatography-multiangle light scattering, isothermal titration calorimetry, mutagenesis","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — two independent crystal structures plus solution stoichiometry and binding measurements in one rigorous study","pmids":["24920673"],"is_preprint":false},{"year":2014,"finding":"Arl3 (GTP-bound) and LC8 (DYNLL1) together induce dissociation of dynactin from dynein. Immunoprecipitation and microtubule pull-down assays showed Arl3(Q71L) and LC8 facilitate dynactin detachment from dynein. LC8 interacts with dynein and Arl3 interacts with dynactin. siRNA knockdown of Arl3 and LC8 causes abnormal localizations of dynein, dynactin, and related organelles.","method":"Co-immunoprecipitation, microtubule pull-down, quantum dot-conjugated protein tracing, live-cell imaging, siRNA knockdown","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple biochemical and cell imaging approaches; single lab","pmids":["25342295"],"is_preprint":false},{"year":2015,"finding":"Crystal structure of DYNLL1 (LC8) bound to a Chica spindle-adaptor peptide identifies a rigid TQT-LC8 anchor interaction coupled with flexible non-TQT interactions, establishing an 'anchored flexibility' model of LC8 motif recognition that explains both TQT requirement and sequence diversity tolerance.","method":"X-ray crystallography, NMR chemical shift/relaxation, isothermal titration calorimetry","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structures of two motif complexes plus NMR dynamics and ITC; multiple orthogonal methods in one study","pmids":["26652654"],"is_preprint":false},{"year":2015,"finding":"Ebola virus VP35 directly and with high affinity interacts with LC8 (DYNLL1). LC8 binding stabilizes the VP35 N-terminal oligomerization domain and enhances viral RNA synthesis. Mutational analysis of VP35 demonstrates the interaction is required for the functional effects of LC8 on RNA synthesis.","method":"Direct binding assay, minigenome viral RNA synthesis assay, mutagenesis of VP35 LC8-binding motif","journal":"Journal of virology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct binding and functional assay with mutagenesis; single lab","pmids":["25741013"],"is_preprint":false},{"year":2018,"finding":"DYNLL1 is an inhibitor of DNA end resection: identified by CRISPR loss-of-function screen, DYNLL1 loss enables DNA end resection and restores homologous recombination in BRCA1-mutant cells. In vitro, DYNLL1 directly binds MRE11 to limit its end-resection activity. In cells, DYNLL1 associates with the MRN complex, BLM helicase, and DNA2 endonuclease to limit nucleolytic degradation of DNA ends.","method":"CRISPR loss-of-function screen, in vitro biochemical end-resection assay, co-immunoprecipitation, HR and NHEJ repair assays","journal":"Nature","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — genome-wide CRISPR screen plus in vitro biochemistry plus cellular HR assays; high-impact venue with multiple orthogonal methods","pmids":["30464262"],"is_preprint":false},{"year":2018,"finding":"DYNLL1 organizes multimeric 53BP1 complexes: DYNLL1 binding stimulates 53BP1 oligomerization and promotes 53BP1 recruitment to DSB-associated chromatin. DYNLL1 regulates 53BP1-dependent NHEJ including immunoglobulin class switch recombination (CSR); deletion of Dynll1 or its regulator Asciz, or mutation of DYNLL1 binding motifs in 53BP1, compromises CSR and renders Brca1 mutant cells resistant to PARP inhibitors.","method":"Co-immunoprecipitation, CSR assays, genetic deletion (Dynll1, Asciz), PARP inhibitor sensitivity assays in cells and tumors, 53BP1 oligomerization assay","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple genetic and biochemical approaches across cell lines and in vivo tumor models; corroborated by PMID:30464262","pmids":["30559443"],"is_preprint":false},{"year":2018,"finding":"DYNLL1 forms a high-affinity heterotetramer with the large myelin-associated glycoprotein (L-MAG) cytoplasmic domain; crystal structure shows 2:2 binding in a parallel arrangement. The DYNLL1-binding segment is near the L-MAG C-terminus adjacent to the Fyn kinase phosphorylation site. DYNLL1 dimerizes L-MAG but not S-MAG, implying an isoform-specific role in myelin-to-axon signaling.","method":"Yeast two-hybrid, in vitro binding with recombinant proteins, X-ray crystallography, small-angle X-ray scattering","journal":"Journal of neurochemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structure plus SAXS plus in vitro binding; multiple orthogonal methods in one study","pmids":["30261098"],"is_preprint":false},{"year":2019,"finding":"LC8 (DYNLL1) accumulates at laser-induced DNA damage tracks in a 53BP1-dependent manner, requiring the canonical H2AX-MDC1-RNF8-RNF168 signal transduction cascade. Genetic inactivation of LC8 or its interaction with 53BP1 causes checkpoint defects. Loss of LC8 alleviates hypersensitivity of BRCA1-depleted cells to ionizing radiation and PARP inhibition.","method":"Laser micro-irradiation and live-cell imaging, genetic inactivation (siRNA/CRISPR), checkpoint assays (γH2AX, Chk2 phosphorylation), PARP inhibitor sensitivity","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 2 / Strong — localization tied to functional consequence, epistasis establishing pathway position, multiple readouts; corroborated by PMID:30559443 and PMID:30464262","pmids":["30982887"],"is_preprint":false},{"year":2019,"finding":"LC8/DYNLL1 (Drosophila Cut-up) is an essential component of the PICTS complex (Panoramix-Nxf2-Nxt1) required for piRNA-pathway co-transcriptional transposon silencing. LC8 drives PICTS complex dimerization through interaction with conserved motifs in Panoramix. Artificial dimerization of Panoramix bypasses the requirement for Ctp/LC8, demonstrating that LC8's role is to promote complex dimerization.","method":"Genetic knockout (loss of Ctp causes transposon de-repression and loss of H3K9me3 marks), artificial dimerization rescue, co-immunoprecipitation, tethering assay","journal":"eLife","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic rescue with artificial dimerization plus chromatin marks plus co-IP; clear mechanistic demonstration of dimerization function","pmids":["33538693"],"is_preprint":false},{"year":2019,"finding":"LC8/DYNLL1 (rabies virus context) binds the disordered linker of the rabies virus phosphoprotein RavP adjacent to an endogenous dimerization domain, restricting RavP domain orientations and inducing a conformation similar to a more active viral polymerase cofactor state. LC8 interactions are essential for efficient viral polymerase functionality; RavP and LC8 colocalize in rabies-infected cells.","method":"NMR, SAXS, molecular modeling, viral minigenome assay, co-localization imaging","journal":"Journal of molecular biology","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — NMR and SAXS structural ensemble plus functional viral assay; single lab","pmids":["31634467"],"is_preprint":false},{"year":2019,"finding":"Phage display proteomic screen identifies 29 validated LC8 (DYNLL1) binding partners from the human proteome; all validated peptides contain the canonical TQT motif anchor. Residues outside the TQT anchor critically determine binding, enabling development of the LC8Pred algorithm with ~78% accuracy for predicting LC8-binding motifs.","method":"Proteomic phage display, isothermal titration calorimetry validation of 29 peptides, bioinformatic algorithm development","journal":"Life science alliance","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — systematic ITC validation of multiple interactions; single lab but large-scale approach","pmids":["31266884"],"is_preprint":false},{"year":2020,"finding":"DYNLL1 binds MRE11 and disrupts the MRE11 dimer to limit DNA end resection. The Shieldin complex is recruited to DSBs hours after DYNLL1, predominantly in G1 cells, and its localization depends on MRE11 activity and is regulated by the DYNLL1-MRE11 interaction. Constitutive association of DYNLL1 with MRE11 can resensitize Shieldin-deficient BRCA1-null cells to PARP inhibitors.","method":"Co-immunoprecipitation, DSB localization assays, PARP inhibitor sensitivity, cell-cycle analysis","journal":"Nature structural & molecular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — mechanistic follow-up to PMID:30464262 establishing temporal and functional dynamics; multiple approaches; independent lab corroborating MRE11 interaction","pmids":["37696958"],"is_preprint":false},{"year":2020,"finding":"Dynll1 forms a persistent complex with mitochondrial cytochrome oxidase Cox4i1 in dendritic cells. Pathogen (Listeria monocytogenes) infection disturbs the Dynll1-Cox4i1 complex; dissociation of this complex is required for release of mitochondrial reactive oxygen species and regulation of intracellular bacterial proliferation. Dynll1 functions as an inhibitor of mitochondrial ROS production.","method":"Mass spectrometry, co-immunoprecipitation, ROS measurement, bacterial proliferation assay in dendritic cells","journal":"Infection and immunity","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus functional ROS and bacterial survival assays; single lab","pmids":["32041786"],"is_preprint":false},{"year":2020,"finding":"LC8 (DYNLL1) binds predominantly in-register to the multivalent IDP domain of ASCIZ (which has three LC8 recognition motifs); at substoichiometric concentrations, one motif is preferentially bound. Linker length between motifs and motif specificity drive the in-register binding mode.","method":"NMR chemical shift perturbation, analytical ultracentrifugation, native electrospray ionization mass spectrometry, saturation transfer difference NMR","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — rigorous NMR and MS methods but single lab; novel mechanistic insight into multivalent binding","pmids":["32139510"],"is_preprint":false},{"year":2021,"finding":"ASCIZ and DYNLL1 are essential for development and expansion of MYC-driven B cell lymphoma. DYNLL1 levels are co-activated by ASCIZ and MYC. Deletion of Asciz or Dynll1 prevented abnormal pre-B cell expansion in pre-cancerous Eµ-Myc mice, potentiated MYC-induced apoptosis, and delayed lymphoma development; induced deletion of Asciz in established lymphomas extended survival.","method":"Genetic deletion (constitutive and inducible) in Eµ-Myc mouse lymphoma model, flow cytometry, apoptosis assays","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic models with multiple deletion strategies and functional endpoints; replicated across pre-cancerous and malignant stages","pmids":["26832406"],"is_preprint":false},{"year":2005,"finding":"DYNLL1 (DNCL1) interacts with the C-terminal domain of PAX6 transcription factor; three PAX6 C-terminal mutations found in patients with eye malformations reduce or abolish the PAX6-DNCL1 interaction, suggesting this interaction may be relevant to PAX6-dependent neurological function.","method":"Yeast two-hybrid library screen, mutagenesis of PAX6 patient alleles","journal":"BMC genetics","confidence":"Low","confidence_rationale":"Tier 3 / Weak — yeast two-hybrid only, single method, no mechanistic follow-up beyond interaction identification","pmids":["16098226"],"is_preprint":false},{"year":2008,"finding":"In nitrergic varicosities of mouse gut, LC8 (DYNLL1/PIN) is associated with all cytosolic forms of nNOS (320-, 250-, 155-kDa) but is absent from membrane-associated nNOS. All cytosolic nNOS associated with LC8 is catalytically inactive and serine847-phosphorylated. LC8 does not associate with calmodulin-bound (active) nNOS, suggesting LC8 may transport inactive nNOS to the membrane where it dissociates.","method":"Co-immunoprecipitation, subcellular fractionation, in vitro nitric oxide assay","journal":"American journal of physiology. Gastrointestinal and liver physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP combined with fractionation and functional NO assay; establishes redox/activity-dependent compartmentalization","pmids":["18635601"],"is_preprint":false},{"year":2010,"finding":"DYNLL1 directly interacts with two newly characterized targets — African swine fever virus protein p54 and the postsynaptic scaffolding protein gephyrin — through motifs homologous to GIQVD or KXTQT consensus sequences. NMR demonstrates direct interaction and structural modeling shows the overall binding mode is preserved as in other complexes, despite residue-level differences.","method":"NMR binding experiments, structural modeling","journal":"FEBS letters","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct NMR binding demonstration; single method, single lab, no functional readout","pmids":["21094642"],"is_preprint":false},{"year":2022,"finding":"DLEU1 lncRNA promotes cell survival in esophageal squamous cell carcinoma by binding and stabilizing DYNLL1 protein, interfering with RNF114-mediated ubiquitination and proteasomal degradation of DYNLL1. The DLEU1/DYNLL1 axis upregulates antiapoptotic BCL2. This identifies RNF114 as an E3 ubiquitin ligase that can target DYNLL1 for proteasomal degradation.","method":"RNA pulldown, co-immunoprecipitation, ubiquitination assay, siRNA knockdown, xenograft tumor models","journal":"Journal of translational medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — RNA pulldown, ubiquitination biochemistry, and cell/in vivo models; single lab identifying a PTM regulatory mechanism for DYNLL1 stability","pmids":["35619131"],"is_preprint":false}],"current_model":"DYNLL1 (LC8) is a small, highly conserved homodimeric hub protein that functions primarily as a dimerization engine: its two symmetric grooves at the dimer interface bind short linear TQT-containing motifs in intrinsically disordered regions of >100 partner proteins, promoting their dimerization or higher-order oligomerization rather than acting as a simple cargo adaptor for dynein. In the DNA damage response, DYNLL1 directly binds MRE11 to disrupt its dimer and limit DNA end resection, and also organizes multimeric 53BP1 complexes to promote 53BP1-dependent NHEJ; together these activities make DYNLL1 a critical determinant of DNA repair pathway choice in BRCA1-deficient cells. DYNLL1 expression is controlled by a feedback loop with the transcription factor ASCIZ, which activates Dynll1 transcription while DYNLL1 protein inhibits ASCIZ's transcriptional activity. Additional established functions include redox-dependent inhibition of NF-κB signaling via IκBα binding, regulation of mitochondrial docking in axons through syntaphilin, facilitation of Pak1 nuclear import through dimerization, control of osteoclastogenesis via NF-κB and MAPK pathways, stabilization of microtubules, and promotion of transposon silencing complex (PICTS) dimerization in the piRNA pathway."},"narrative":{"mechanistic_narrative":"DYNLL1 (LC8) is a small, highly conserved homodimeric hub protein that functions as a dimerization engine, binding short linear TQT-anchored motifs in intrinsically disordered regions of diverse partners and thereby driving their dimerization or higher-order oligomerization [PMID:10426949, PMID:26652654, PMID:31266884]. The protein exists in a reversible, pH-dependent monomer–dimer equilibrium, and dimerization creates two symmetric hydrophobic grooves at the interface into which a partner peptide inserts as an additional antiparallel beta-strand [PMID:10426949, PMID:11327818]. Recognition combines a rigid TQT anchor with flexible flanking contacts, an 'anchored flexibility' mode that explains both the conserved motif requirement and tolerance for sequence diversity, and partner binding can be tuned by phosphorylation immediately N-terminal to the motif [PMID:23482567, PMID:26652654]. Through this engine DYNLL1 oligomerizes structurally and functionally unrelated clients, including Nek9, the Ana2 centriole duplication factor, and the Panoramix subunit of the piRNA-pathway PICTS silencing complex, where artificial dimerization fully bypasses the LC8 requirement [PMID:21454704, PMID:24920673, PMID:33538693]. In the DNA damage response DYNLL1 directly binds and disrupts the MRE11 dimer to restrain DNA end resection, while also stimulating 53BP1 oligomerization and its recruitment to double-strand-break chromatin to promote NHEJ; together these activities determine repair pathway choice, and DYNLL1 loss restores homologous recombination and PARP-inhibitor resistance in BRCA1-deficient cells [PMID:30464262, PMID:30559443, PMID:37696958, PMID:30982887]. DYNLL1 abundance is set by a feedback loop with the transcription factor ASCIZ, which directly activates Dynll1 transcription while DYNLL1 protein binds multivalent motifs in the ASCIZ activation domain to inhibit it; this axis controls Bim-dependent apoptosis in developing B cells and is co-opted in MYC-driven B-cell lymphoma [PMID:22167198, PMID:22891272, PMID:32139510, PMID:26832406]. Additional characterized roles include redox-regulated inhibition of NF-κB signaling via IκBα binding and control of osteoclastogenesis, regulation of axonal mitochondrial docking through syntaphilin, and dimerization-dependent nuclear import of Pak1 [PMID:18579519, PMID:23293355, PMID:19641106, PMID:19557173].","teleology":[{"year":1999,"claim":"Established the structural basis for how DYNLL1 binds partners, answering how a small protein recognizes diverse peptides: the dimer presents grooves that accept a partner peptide as a beta-strand.","evidence":"X-ray crystallography of the LC8 dimer bound to an nNOS peptide","pmids":["10426949"],"confidence":"High","gaps":["Single peptide complex; generality of the binding mode across partners not yet tested","No quantitation of dimerization energetics"]},{"year":2001,"claim":"Defined DYNLL1 as a reversible, pH-sensitive monomer–dimer system, showing that the functional binding unit is the dimer and can be regulated by the monomer–dimer equilibrium.","evidence":"Analytical ultracentrifugation, SEC, circular dichroism and fluorescence on recombinant LC8","pmids":["11327818"],"confidence":"High","gaps":["Physiological relevance of pH-dependent dissociation in cells unaddressed","Does not link equilibrium state to specific partner binding outcomes"]},{"year":2007,"claim":"Reframed DYNLL1 from a dynein cargo adaptor to a general dimerization engine by showing cargo peptides bind the same groove with higher affinity than dynein intermediate chain.","evidence":"Crystallography, hydrogen-exchange NMR, and ITC comparing dynein IC and Swallow peptides","pmids":["17570393"],"confidence":"High","gaps":["Functional consequence of dimerization tested only in vitro for these partners","Did not enumerate the full client repertoire"]},{"year":2008,"claim":"Linked DYNLL1 to redox-controlled NF-κB signaling, explaining how oxidative stress relieves DYNLL1's inhibition of IκBα phosphorylation.","evidence":"Co-IP, NF-κB reporter assays, and redox biochemistry showing Cys2 disulfide formation reversed by TRP14","pmids":["18579519"],"confidence":"High","gaps":["Stoichiometry of the LC8–IκBα complex not defined","In vivo significance of the redox switch not established"]},{"year":2008,"claim":"Resolved how DYNLL1 engages Pak1, refuting a phosphorylation model and showing binding occurs in the canonical groove requiring dimerization.","evidence":"NMR, crystallography, LC8 point mutants, and in vitro kinase assay","pmids":["18650427"],"confidence":"High","gaps":["Cellular consequence of Pak1 binding not directly tested in this study","Whether binding alters Pak1 catalytic activity unresolved"]},{"year":2008,"claim":"Connected DYNLL1 to nNOS activity-state and compartmentalization, indicating it associates selectively with catalytically inactive, phosphorylated cytosolic nNOS.","evidence":"Co-IP, subcellular fractionation, and in vitro NO assay in mouse gut nitrergic varicosities","pmids":["18635601"],"confidence":"Medium","gaps":["Direct binding interface to nNOS not mapped here","Proposed membrane-transport role inferred, not demonstrated"]},{"year":2009,"claim":"Demonstrated DYNLL1 controls axonal mitochondrial docking by enhancing the syntaphilin–microtubule interaction, extending the dimerization-engine concept to organelle positioning.","evidence":"Co-IP, motif-deletion mutagenesis, live imaging in neurons, and CD on the SNPH coiled-coil","pmids":["19641106"],"confidence":"High","gaps":["Whether DYNLL1 oligomerizes SNPH per se not directly shown","Regulation of the interaction in vivo unaddressed"]},{"year":2009,"claim":"Tied DYNLL1-mediated Pak1 dimerization to a functional outcome: EGF-induced nuclear import of Pak1 and developmental rescue.","evidence":"Fluorescence import assays in MCF-7 cells and zebrafish morpholino rescue with binding/NLS mutants","pmids":["19557173"],"confidence":"Medium","gaps":["Single-lab finding without reciprocal structural validation in cells","Mechanism connecting dimerization to NLS exposure not defined"]},{"year":2011,"claim":"Established the ASCIZ–DYNLL1 transcriptional feedback loop, explaining how cellular DYNLL1 levels are homeostatically set.","evidence":"ChIP, promoter reporter, and co-IP across human, mouse, and chicken cells","pmids":["22167198"],"confidence":"High","gaps":["Quantitative threshold of DYNLL1 needed to inhibit ASCIZ unclear","Other transcriptional inputs to Dynll1 not explored"]},{"year":2011,"claim":"Showed DYNLL1 binding multimerizes Nek9 and inserts a phospho-regulated switch into spindle-kinase signaling.","evidence":"Co-IP, kinase activity assays, mutagenesis, and SEC on the Nek9/Nek6 module","pmids":["21454704"],"confidence":"High","gaps":["Cellular spindle phenotypes of disrupting the interaction not detailed here"]},{"year":2011,"claim":"Mapped DYNLL1 binding to multiple SQ/TQ motifs in ATMIN/ASCIZ and showed reciprocal effects on localization, supporting the multivalent feedback model.","evidence":"Yeast two-hybrid, pepscan, NMR-modeled complexes, and co-expression imaging","pmids":["21971545"],"confidence":"Medium","gaps":["Binding stoichiometry resolved only later","Functional consequence on transcription not measured here"]},{"year":2012,"claim":"Placed DYNLL1 downstream of ASCIZ in B-cell development by genetic epistasis, showing the lymphopenia of ASCIZ loss runs through DYNLL1 and Bim-dependent apoptosis.","evidence":"Ectopic Dynll1 rescue and Bim-knockout epistasis with flow cytometry in mice","pmids":["22891272"],"confidence":"High","gaps":["Direct DYNLL1 control of Bim at the molecular level not dissected here"]},{"year":2012,"claim":"Implicated DYNLL1 in microtubule assembly and mitotic spindle stability, broadening its cytoskeletal roles.","evidence":"In vitro MT assembly, immunofluorescence in Drosophila and HeLa, siRNA/overexpression, docking","pmids":["23038268"],"confidence":"Medium","gaps":["Direct tubulin-binding interface unresolved","Single-lab, not independently replicated"]},{"year":2013,"claim":"Provided the structural mechanism for phosphorylation-gated partner binding, showing pSer944 immediately N-terminal to the Nek9 motif weakens LC8 affinity.","evidence":"Crystal structures of phosphorylated/unphosphorylated peptides plus ITC","pmids":["23482567"],"confidence":"High","gaps":["Generality of N-terminal phospho-regulation across other partners not surveyed"]},{"year":2013,"claim":"Extended DYNLL1's NF-κB-inhibitory role to osteoclast biology and bone homeostasis in vivo.","evidence":"Osteoclast differentiation assays, Western blots, LC8-transgenic mice, ovariectomy model","pmids":["23293355"],"confidence":"Medium","gaps":["Single lab; direct binding partners in the MAPK arm not mapped","Mild phenotype leaves contribution magnitude uncertain"]},{"year":2014,"claim":"Demonstrated DYNLL1 builds defined higher-order assemblies, dimers bridging two Ana2 sites to drive Ana2 tetramerization in centriole duplication.","evidence":"Two crystal structures, SEC-MALS stoichiometry, and ITC","pmids":["24920673"],"confidence":"High","gaps":["Cellular requirement for the tetramer in centriole duplication inferred from structure"]},{"year":2014,"claim":"Implicated DYNLL1 with Arl3-GTP in regulating dynein–dynactin association, retaining a connection to the motor system.","evidence":"Co-IP, MT pull-down, quantum-dot tracing, live imaging, siRNA","pmids":["25342295"],"confidence":"Medium","gaps":["Mechanism by which LC8 promotes dynactin detachment not structurally defined","Single lab"]},{"year":2015,"claim":"Defined the 'anchored flexibility' recognition model reconciling the strict TQT requirement with broad sequence tolerance among partners.","evidence":"Crystallography of a Chica peptide complex with NMR dynamics and ITC","pmids":["26652654"],"confidence":"High","gaps":["Predictive power across the proteome addressed only by later screening"]},{"year":2015,"claim":"Showed viral proteins exploit DYNLL1 as a dimerization cofactor, with VP35 binding stabilizing its oligomerization domain to enhance viral RNA synthesis.","evidence":"Direct binding, Ebola minigenome assay, and VP35 motif mutagenesis","pmids":["25741013"],"confidence":"Medium","gaps":["Structural detail of the VP35–LC8 complex not resolved here","Single lab"]},{"year":2018,"claim":"Revealed DYNLL1 as a direct inhibitor of DNA end resection, binding MRE11 and limiting nucleolytic processing to enforce repair pathway choice.","evidence":"CRISPR loss-of-function screen, in vitro end-resection biochemistry, co-IP, HR/NHEJ assays","pmids":["30464262"],"confidence":"High","gaps":["Mechanism of MRE11 inhibition resolved structurally only later","Interplay with shieldin not yet defined here"]},{"year":2018,"claim":"Showed DYNLL1 organizes 53BP1 oligomers to promote NHEJ and class switch recombination, and that its loss confers PARP-inhibitor resistance in BRCA1-mutant cells.","evidence":"Co-IP, CSR assays, Dynll1/Asciz deletion, 53BP1 oligomerization and PARPi sensitivity in cells and tumors","pmids":["30559443"],"confidence":"High","gaps":["Stoichiometry of 53BP1 oligomers in chromatin not defined"]},{"year":2019,"claim":"Placed DYNLL1 within the canonical DSB signaling cascade, showing its 53BP1-dependent recruitment to damage tracks and checkpoint function.","evidence":"Laser micro-irradiation, genetic inactivation, checkpoint readouts, PARPi sensitivity","pmids":["30982887"],"confidence":"High","gaps":["Direct chromatin-binding versus 53BP1-mediated recruitment not fully separated"]},{"year":2019,"claim":"Demonstrated the dimerization-engine function in the piRNA pathway, where artificial dimerization of Panoramix bypasses the LC8 requirement for transposon silencing.","evidence":"Ctp knockout, artificial dimerization rescue, co-IP, and tethering assays in Drosophila","pmids":["33538693"],"confidence":"High","gaps":["Whether mammalian DYNLL1 has an analogous silencing client unaddressed"]},{"year":2019,"claim":"Showed DYNLL1 reshapes a viral phosphoprotein's conformational ensemble, restricting RavP domain orientation toward an active polymerase-cofactor state.","evidence":"NMR, SAXS, modeling, rabies minigenome assay, co-localization","pmids":["31634467"],"confidence":"Medium","gaps":["Functional model based on ensemble inference; single lab"]},{"year":2019,"claim":"Systematically mapped the human LC8 interactome and built a predictive motif algorithm, confirming the TQT anchor with flanking-residue determinants.","evidence":"Proteomic phage display with ITC validation of 29 peptides and LC8Pred development","pmids":["31266884"],"confidence":"Medium","gaps":["Predicted partners require individual functional validation","Prediction accuracy ~78%"]},{"year":2020,"claim":"Resolved how DYNLL1 multivalently engages ASCIZ, binding in-register across its three motifs with linker length and motif specificity governing the mode.","evidence":"NMR, AUC, native ESI-MS, and STD-NMR on the ASCIZ IDP domain","pmids":["32139510"],"confidence":"Medium","gaps":["Single lab; in-register binding consequences for transcriptional output not measured"]},{"year":2020,"claim":"Refined the resection mechanism, showing DYNLL1 disrupts the MRE11 dimer and coordinates timing with shieldin recruitment at breaks.","evidence":"Co-IP, DSB localization, cell-cycle analysis, PARPi sensitivity","pmids":["37696958"],"confidence":"High","gaps":["Structure of the DYNLL1–MRE11 complex not solved here"]},{"year":2020,"claim":"Identified a mitochondrial DYNLL1–Cox4i1 complex acting as a brake on ROS, dissociated upon pathogen infection to control bacterial proliferation.","evidence":"Mass spectrometry, co-IP, ROS and bacterial proliferation assays in dendritic cells","pmids":["32041786"],"confidence":"Medium","gaps":["Whether this depends on canonical TQT-motif binding unknown","Single lab"]},{"year":2021,"claim":"Established the ASCIZ–DYNLL1 axis as a driver of MYC-induced B-cell lymphoma, with co-activation by ASCIZ and MYC and a tumor-promoting, apoptosis-restraining role.","evidence":"Constitutive and inducible Asciz/Dynll1 deletion in Eµ-Myc mice with flow cytometry and apoptosis assays","pmids":["26832406"],"confidence":"High","gaps":["Whether DNA-repair versus apoptotic functions dominate tumorigenesis not separated"]},{"year":2018,"claim":"Showed isoform-selective dimerization of a myelin glycoprotein, with DYNLL1 forming a 2:2 heterotetramer dimerizing L-MAG but not S-MAG.","evidence":"Yeast two-hybrid, in vitro binding, crystallography, and SAXS","pmids":["30261098"],"confidence":"High","gaps":["Cellular consequence for myelin-to-axon signaling not directly tested"]},{"year":2022,"claim":"Defined post-translational control of DYNLL1 stability, identifying RNF114-mediated ubiquitination antagonized by DLEU1 lncRNA in esophageal carcinoma.","evidence":"RNA pulldown, co-IP, ubiquitination assay, siRNA, xenografts","pmids":["35619131"],"confidence":"Medium","gaps":["Direct RNF114 ubiquitination site on DYNLL1 not mapped","Single lab"]},{"year":2005,"claim":"Reported an early DYNLL1–PAX6 interaction with patient mutations weakening binding, hinting at relevance to PAX6-dependent development.","evidence":"Yeast two-hybrid library screen and PAX6 patient-allele mutagenesis","pmids":["16098226"],"confidence":"Low","gaps":["Yeast two-hybrid only, no orthogonal validation","No mechanistic or in vivo follow-up"]},{"year":null,"claim":"How DYNLL1's competing roles across DNA repair, transcriptional feedback, cytoskeleton, and organelle/redox control are partitioned and prioritized within a single cell remains unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["No model integrating partner competition for the limited groove pool","No structure of the DYNLL1–MRE11 complex","Quantitative rules governing which clients dominate at given DYNLL1 levels unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,2,17,25]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[9,19,26,23]},{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[12,16]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[31,7]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[19,20,22]},{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[6,27]},{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[12]}],"pathway":[{"term_id":"R-HSA-73894","term_label":"DNA Repair","supporting_discovery_ids":[19,20,22,26]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[8,28]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[3,14]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[11,29]},{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[23]}],"complexes":["PICTS complex (Panoramix-Nxf2-Nxt1)","MRN complex (with MRE11)","53BP1 oligomeric complex","Nek9/Nek6/7 spindle kinase module"],"partners":["ASCIZ","MRE11","53BP1","NEK9","SNPH","PAK1","IΚBΑ","ANA2"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P63167","full_name":"Dynein light chain 1, cytoplasmic","aliases":["8 kDa dynein light chain","DLC8","Dynein light chain LC8-type 1","Protein inhibitor of neuronal nitric oxide synthase","PIN"],"length_aa":89,"mass_kda":10.4,"function":"Component of dynein, a family of motor proteins essential for movement along microtubules (By similarity). Required for structural and functional integrity of cilia (By similarity). Acts as one of several non-catalytic accessory components of the cytoplasmic dynein 1 complex that are thought to be involved in linking dynein to cargos and to adapter proteins that regulate dynein function (By similarity). Cytoplasmic dynein 1 acts as a motor for the intracellular retrograde motility of vesicles and organelles along microtubules (By similarity). May play a role in changing or maintaining the spatial distribution of cytoskeletal structures (By similarity). In addition to its role in cytoskeleton and transport, acts as a protein-protein adapter, which inhibits and/or sequesters target proteins (PubMed:10198631, PubMed:15193260, PubMed:15891768, PubMed:16684779, PubMed:30464262, PubMed:37696958). Involved in the response to DNA damage by acting as a key regulator of DNA end resection: when phosphorylated at Ser-88, recruited to DNA double-strand breaks (DSBs) by TP53BP1 and acts by disrupting MRE11 dimerization, thereby inhibiting DNA end resection (PubMed:30464262, PubMed:37696958). In a subset of DSBs, DYNLL1 remains unphosphorylated and promotes the recruitment of the Shieldin complex (PubMed:37696958). Binds and inhibits the catalytic activity of neuronal nitric oxide synthase/NOS1 (By similarity). Promotes transactivation functions of ESR1 and plays a role in the nuclear localization of ESR1 (PubMed:15891768, PubMed:16684779). Regulates apoptotic activities of BCL2L11 by sequestering it to microtubules (PubMed:10198631, PubMed:15193260). Upon apoptotic stimuli the BCL2L11-DYNLL1 complex dissociates from cytoplasmic dynein and translocates to mitochondria and sequesters BCL2 thus neutralizing its antiapoptotic activity (PubMed:10198631, PubMed:15193260)","subcellular_location":"Cytoplasm, cytoskeleton, microtubule organizing center, centrosome; Chromosome; Cytoplasm, cytoskeleton; Nucleus; Mitochondrion","url":"https://www.uniprot.org/uniprotkb/P63167/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/DYNLL1","classification":"Common Essential","n_dependent_lines":736,"n_total_lines":1208,"dependency_fraction":0.609271523178808},"opencell":{"profiled":true,"resolved_as":"","ensg_id":"ENSG00000088986","cell_line_id":"CID001411","localizations":[{"compartment":"nuclear_punctae","grade":3},{"compartment":"nucleoplasm","grade":3},{"compartment":"cytoplasmic","grade":2},{"compartment":"cytoskeleton","grade":2}],"interactors":[{"gene":"FAM117B","stoichiometry":10.0},{"gene":"STRN3","stoichiometry":10.0},{"gene":"DYNC1LI1","stoichiometry":10.0},{"gene":"DYNLL2","stoichiometry":10.0},{"gene":"NEK9","stoichiometry":10.0},{"gene":"TP53BP1","stoichiometry":10.0},{"gene":"ZMYM4","stoichiometry":4.0},{"gene":"AMOT","stoichiometry":4.0},{"gene":"GLCCI1","stoichiometry":4.0},{"gene":"DCAF7","stoichiometry":4.0}],"url":"https://opencell.sf.czbiohub.org/target/CID001411","total_profiled":1310},"omim":[{"mim_id":"616967","title":"THIOREDOXIN DOMAIN-CONTAINING PROTEIN 17; TXNDC17","url":"https://www.omim.org/entry/616967"},{"mim_id":"616207","title":"NEGATIVE REGULATOR OF ANTIVIRAL RESPONSE, NONCODING; NRAV","url":"https://www.omim.org/entry/616207"},{"mim_id":"614693","title":"ATM INTERACTOR; ATMIN","url":"https://www.omim.org/entry/614693"},{"mim_id":"614071","title":"MYOCARDIAL ZONULA ADHERENS PROTEIN; MYZAP","url":"https://www.omim.org/entry/614071"},{"mim_id":"613363","title":"DYNEIN, CYTOPLASMIC 2, INTERMEDIATE CHAIN 2; DYNC2I2","url":"https://www.omim.org/entry/613363"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"},{"location":"Cytosol","reliability":"Approved"},{"location":"Mid piece","reliability":"Approved"},{"location":"Principal piece","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/DYNLL1"},"hgnc":{"alias_symbol":["hdlc1","DLC1","PIN","LC8","DLC8"],"prev_symbol":["DNCL1"]},"alphafold":{"accession":"P63167","domains":[{"cath_id":"3.30.740.10","chopping":"5-86","consensus_level":"high","plddt":97.4277,"start":5,"end":86}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P63167","model_url":"https://alphafold.ebi.ac.uk/files/AF-P63167-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P63167-F1-predicted_aligned_error_v6.png","plddt_mean":95.31},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=DYNLL1","jax_strain_url":"https://www.jax.org/strain/search?query=DYNLL1"},"sequence":{"accession":"P63167","fasta_url":"https://rest.uniprot.org/uniprotkb/P63167.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P63167/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P63167"}},"corpus_meta":[{"pmid":"25604445","id":"PMC_25604445","title":"PIN-dependent 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A 13-residue nNOS peptide binds in a deep hydrophobic groove at the dimer interface as a sixth antiparallel beta-strand, providing structural basis for dimerization and peptide binding.\",\n      \"method\": \"X-ray crystallography\",\n      \"journal\": \"Nature structural biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structure with direct functional validation of peptide binding; foundational structural paper replicated by subsequent studies\",\n      \"pmids\": [\"10426949\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"LC8 (DYNLL1) exists as a reversible monomer-dimer equilibrium with a dissociation constant of ~12 µM at pH 7; dimerization is pH-dependent, with dissociation to monomer below pH ~4.8, attributable to titration of a histidine pair at the dimer interface. Unfolding is a two-stage process: dimer dissociation to folded monomer precedes global unfolding.\",\n      \"method\": \"Analytical ultracentrifugation, size-exclusion chromatography, circular dichroism, fluorescence spectroscopy\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — multiple orthogonal biophysical methods in a single rigorous study establishing dimerization mechanism\",\n      \"pmids\": [\"11327818\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"LC8 (DYNLL1) binds peptides from both dynein intermediate chain (IC) and the Drosophila cargo protein Swallow (Swa) in the same grooves at the dimer interface; both GIQVD and KXTQT fingerprint sequences are recognized in the same groove. Swallow binds with higher affinity than IC, suggesting that LC8's binding to cargo proteins like Swallow serves a dimerization function independent of its role in dynein.\",\n      \"method\": \"X-ray crystallography, hydrogen isotope exchange NMR, isothermal titration calorimetry\",\n      \"journal\": \"Journal of molecular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structures plus NMR dynamics, multiple orthogonal methods establishing shared binding groove and dimerization engine function\",\n      \"pmids\": [\"17570393\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"DYNLL1 (LC8) binds IκBα and prevents its phosphorylation by IκB kinase (IKK), thereby inhibiting NF-κB activation. TNFα-induced reactive oxygen species oxidize LC8 to form an intermolecular disulfide bond between Cys2 residues, causing LC8 dissociation from IκBα. The thioredoxin-related protein TRP14 reduces oxidized LC8 to maintain its inhibitory function.\",\n      \"method\": \"Co-immunoprecipitation, in-cell NF-κB reporter assays, redox biochemistry, mutagenesis\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP, functional reporter assays, and biochemical redox mechanism established in a single study with multiple orthogonal approaches\",\n      \"pmids\": [\"18579519\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Pak1 (residues 212-222) binds DYNLL1 (LC8) in the same canonical groove as nNOS and BimL, requiring the target-binding interface formed by LC8 dimerization. In vitro phosphorylation assays show Pak1 does not phosphorylate LC8 at Ser88 (which is inaccessible in the dimer), refuting the prior model; instead LC8 binding may modulate Pak1 activity and/or nuclear localization.\",\n      \"method\": \"NMR, X-ray crystallography, biochemical LC8 point mutants (K36P, T67A), in vitro phosphorylation assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structure plus NMR plus mutagenesis plus in vitro assay in a single study; negative phosphorylation result rigorously established\",\n      \"pmids\": [\"18650427\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Phosphomimetic mutation in LC8 (DYNLL1) promotes dissociation to monomer and, by NMR backbone relaxation, the monomer shows more heterogeneous dynamics in residues forming the binding groove (beta1 and beta3 strands), suggesting dimerization pre-organizes the binding groove for ligand recognition. Peptide binding either retains (IC peptide) or silences (Swallow peptide) millisecond-microsecond dynamics in the groove, indicating ligand-specific conformational dynamics.\",\n      \"method\": \"15N NMR relaxation, equilibrium unfolding\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — rigorous NMR method but single lab, no independent replication of mechanistic model\",\n      \"pmids\": [\"18942858\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"LC8 (DYNLL1) binds syntaphilin (SNPH) through a seven-residue LC8-binding motif, recruits to axonal mitochondria via SNPH, and enhances the SNPH-microtubule docking interaction to reduce mitochondrial mobility. Deletion of the LC8-binding motif on SNPH abolishes colocalization and impairs SNPH's ability to immobilize mitochondria. Circular dichroism shows LC8 stabilizes an alpha-helical coiled-coil in the SNPH microtubule-binding domain.\",\n      \"method\": \"Co-immunoprecipitation, mutagenesis, time-lapse live imaging in neurons, circular dichroism, fractionation\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (Co-IP, mutagenesis, live imaging, CD) establishing mechanism of mitochondrial docking regulation by LC8\",\n      \"pmids\": [\"19641106\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"LC8 (DYNLL1) interaction with Pak1 is required for EGF-induced nuclear import of Pak1 in MCF-7 cells, and this event is contingent on LC8-mediated Pak1 dimerization. Pak2, which lacks an LC8 binding site, remains cytoplasmic upon EGF stimulation. In zebrafish, developmental defects caused by Pak morpholino knockdown are partially rescued by wild-type Pak1 but not by Pak1 mutants disrupting either the LC8 binding or NLS sites.\",\n      \"method\": \"Fluorescence microscopy for nuclear import, zebrafish morpholino rescue, mutagenesis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — live-cell localization with functional consequence, zebrafish in vivo rescue, mutagenesis; single lab\",\n      \"pmids\": [\"19557173\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"ASCIZ (ATMIN/ZNF822) is a transcriptional activator of the Dynll1 gene; DYNLL1 levels are reduced ~10-fold in ASCIZ-deficient human, mouse, and chicken cells. ASCIZ binds directly to the Dynll1 promoter in a Zn-finger-dependent manner. DYNLL1 protein in turn interacts with ten binding sites in the ASCIZ transcription activation domain, and high DYNLL1 levels inhibit ASCIZ transcriptional activity, forming a feedback loop. DYNLL1 is also required for DNA-damage-induced ASCIZ focus formation.\",\n      \"method\": \"ChIP, promoter reporter assay, co-IP, cell-based transcription assays across three cell types\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (ChIP, reporter, co-IP) replicated across human/mouse/chicken cells establishing transcriptional feedback mechanism\",\n      \"pmids\": [\"22167198\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"LC8 (DYNLL1) binds Nek9 via a (K/R)XTQT motif adjacent to the Nek9 C-terminal coiled coil, causing Nek9 multimerization and increased Nek9 autoactivation. LC8 binding is regulated by Nek9 autophosphorylation on Ser944 immediately N-terminal to the motif. LC8 bound to Nek9 interferes with Nek9's interaction with its downstream partner Nek6 and with Nek6 activation, thus controlling signal transduction through the Nek9/Nek6/7 spindle kinase module.\",\n      \"method\": \"Co-immunoprecipitation, kinase activity assays, mutagenesis, size-exclusion chromatography\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP, kinase assay, mutagenesis; multiple functional readouts in one study\",\n      \"pmids\": [\"21454704\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"LC8 (DYNLL1) binds to multiple SQ/TQ motifs in the C-terminal domain of ATMIN/ASCIZ; co-expression of mCherry-DYNLL1 and GFP-ATMIN mutually affects intracellular protein localization, and DYNLL1 partially impedes DNA damage-induced ATMIN nuclear foci formation.\",\n      \"method\": \"Yeast two-hybrid, pepscan, NMR-modelled complexes, co-expression localization imaging\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — yeast two-hybrid, in vitro binding, and cell imaging; partially supported by the PMID:22167198 study\",\n      \"pmids\": [\"21971545\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"DYNLL1 (LC8) regulates B cell development downstream of ASCIZ: ASCIZ-deficient B cell precursors have highly reduced DYNLL1 levels, and ectopic Dynll1 expression restores normal B cell development. The B cell lymphopenia caused by ASCIZ absence can be fully suppressed by deletion of the proapoptotic DYNLL1 target Bim, placing DYNLL1 upstream of Bim-dependent apoptosis in developing B cells.\",\n      \"method\": \"Genetic rescue (ectopic Dynll1 expression), genetic epistasis (Bim knockout), flow cytometry of B cell populations in mice\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic epistasis with multiple rescue conditions across mouse models establishing pathway position\",\n      \"pmids\": [\"22891272\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"LC8 (DYNLL1) binds tubulin, promotes microtubule assembly in vitro, and stabilizes microtubules in Drosophila embryos and HeLa cells. LC8 overexpression increases microtubule acetylation and resistance to cold/nocodazole-induced depolymerization; LC8 knockdown or inhibitory peptides destabilize microtubules, inhibit bipolar spindle assembly, and cause mitotic block in HeLa cells.\",\n      \"method\": \"In vitro microtubule assembly assay, immunofluorescence in Drosophila embryos and HeLa cells, siRNA knockdown, overexpression, molecular docking\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro assay plus cell biological validation across two model systems; single lab\",\n      \"pmids\": [\"23038268\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Crystal structures of DYNLL1 (LC8) bound to Nek9 binding region peptides with and without phosphorylation on Ser944 reveal that phosphorylation of Ser944 (immediately N-terminal to the KXTQT motif) sterically and electrostatically reduces binding affinity of Nek9 to LC8, providing a structural mechanism for phosphorylation-regulated LC8-partner complex formation.\",\n      \"method\": \"X-ray crystallography, isothermal titration calorimetry, biophysical binding assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structures with and without phosphorylation plus quantitative binding measurements; single lab but two orthogonal methods\",\n      \"pmids\": [\"23482567\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"LC8 (DYNLL1) inhibits RANKL-induced osteoclast differentiation, actin ring formation, and bone resorption by binding IκBα and preventing its phosphorylation and degradation, thereby suppressing NF-κB activation. LC8 also inhibits RANKL-induced JNK and ERK activation and downstream c-Fos and NFATc1 expression. LC8-transgenic mice show a mild osteopetrotic phenotype.\",\n      \"method\": \"Osteoclast differentiation assays, Western blotting, transgenic mouse phenotyping, ovariectomy bone loss model\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional cell assays with pathway readouts plus in vivo mouse model; single lab, builds on earlier mechanistic work (PMID:18579519)\",\n      \"pmids\": [\"23293355\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"DYNLL1 (LC8) mediates oligomerization of the Ana2 centriole duplication factor by binding two LC8-binding sites within Ana2; site 1 contains a TQT motif (Kd ~1.1 µM) and site 2 a TQC motif (Kd ~13 µM). Crystal structures show the Ana2 peptides form beta-strands extending a central LC8 beta-sandwich. LC8 dimers binding two Ana2 sites induce Ana2 tetramerization, yielding an Ana2M4-LC88 complex.\",\n      \"method\": \"X-ray crystallography (two independent structures), size-exclusion chromatography-multiangle light scattering, isothermal titration calorimetry, mutagenesis\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — two independent crystal structures plus solution stoichiometry and binding measurements in one rigorous study\",\n      \"pmids\": [\"24920673\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Arl3 (GTP-bound) and LC8 (DYNLL1) together induce dissociation of dynactin from dynein. Immunoprecipitation and microtubule pull-down assays showed Arl3(Q71L) and LC8 facilitate dynactin detachment from dynein. LC8 interacts with dynein and Arl3 interacts with dynactin. siRNA knockdown of Arl3 and LC8 causes abnormal localizations of dynein, dynactin, and related organelles.\",\n      \"method\": \"Co-immunoprecipitation, microtubule pull-down, quantum dot-conjugated protein tracing, live-cell imaging, siRNA knockdown\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple biochemical and cell imaging approaches; single lab\",\n      \"pmids\": [\"25342295\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Crystal structure of DYNLL1 (LC8) bound to a Chica spindle-adaptor peptide identifies a rigid TQT-LC8 anchor interaction coupled with flexible non-TQT interactions, establishing an 'anchored flexibility' model of LC8 motif recognition that explains both TQT requirement and sequence diversity tolerance.\",\n      \"method\": \"X-ray crystallography, NMR chemical shift/relaxation, isothermal titration calorimetry\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structures of two motif complexes plus NMR dynamics and ITC; multiple orthogonal methods in one study\",\n      \"pmids\": [\"26652654\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Ebola virus VP35 directly and with high affinity interacts with LC8 (DYNLL1). LC8 binding stabilizes the VP35 N-terminal oligomerization domain and enhances viral RNA synthesis. Mutational analysis of VP35 demonstrates the interaction is required for the functional effects of LC8 on RNA synthesis.\",\n      \"method\": \"Direct binding assay, minigenome viral RNA synthesis assay, mutagenesis of VP35 LC8-binding motif\",\n      \"journal\": \"Journal of virology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct binding and functional assay with mutagenesis; single lab\",\n      \"pmids\": [\"25741013\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"DYNLL1 is an inhibitor of DNA end resection: identified by CRISPR loss-of-function screen, DYNLL1 loss enables DNA end resection and restores homologous recombination in BRCA1-mutant cells. In vitro, DYNLL1 directly binds MRE11 to limit its end-resection activity. In cells, DYNLL1 associates with the MRN complex, BLM helicase, and DNA2 endonuclease to limit nucleolytic degradation of DNA ends.\",\n      \"method\": \"CRISPR loss-of-function screen, in vitro biochemical end-resection assay, co-immunoprecipitation, HR and NHEJ repair assays\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — genome-wide CRISPR screen plus in vitro biochemistry plus cellular HR assays; high-impact venue with multiple orthogonal methods\",\n      \"pmids\": [\"30464262\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"DYNLL1 organizes multimeric 53BP1 complexes: DYNLL1 binding stimulates 53BP1 oligomerization and promotes 53BP1 recruitment to DSB-associated chromatin. DYNLL1 regulates 53BP1-dependent NHEJ including immunoglobulin class switch recombination (CSR); deletion of Dynll1 or its regulator Asciz, or mutation of DYNLL1 binding motifs in 53BP1, compromises CSR and renders Brca1 mutant cells resistant to PARP inhibitors.\",\n      \"method\": \"Co-immunoprecipitation, CSR assays, genetic deletion (Dynll1, Asciz), PARP inhibitor sensitivity assays in cells and tumors, 53BP1 oligomerization assay\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple genetic and biochemical approaches across cell lines and in vivo tumor models; corroborated by PMID:30464262\",\n      \"pmids\": [\"30559443\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"DYNLL1 forms a high-affinity heterotetramer with the large myelin-associated glycoprotein (L-MAG) cytoplasmic domain; crystal structure shows 2:2 binding in a parallel arrangement. The DYNLL1-binding segment is near the L-MAG C-terminus adjacent to the Fyn kinase phosphorylation site. DYNLL1 dimerizes L-MAG but not S-MAG, implying an isoform-specific role in myelin-to-axon signaling.\",\n      \"method\": \"Yeast two-hybrid, in vitro binding with recombinant proteins, X-ray crystallography, small-angle X-ray scattering\",\n      \"journal\": \"Journal of neurochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structure plus SAXS plus in vitro binding; multiple orthogonal methods in one study\",\n      \"pmids\": [\"30261098\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LC8 (DYNLL1) accumulates at laser-induced DNA damage tracks in a 53BP1-dependent manner, requiring the canonical H2AX-MDC1-RNF8-RNF168 signal transduction cascade. Genetic inactivation of LC8 or its interaction with 53BP1 causes checkpoint defects. Loss of LC8 alleviates hypersensitivity of BRCA1-depleted cells to ionizing radiation and PARP inhibition.\",\n      \"method\": \"Laser micro-irradiation and live-cell imaging, genetic inactivation (siRNA/CRISPR), checkpoint assays (γH2AX, Chk2 phosphorylation), PARP inhibitor sensitivity\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — localization tied to functional consequence, epistasis establishing pathway position, multiple readouts; corroborated by PMID:30559443 and PMID:30464262\",\n      \"pmids\": [\"30982887\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LC8/DYNLL1 (Drosophila Cut-up) is an essential component of the PICTS complex (Panoramix-Nxf2-Nxt1) required for piRNA-pathway co-transcriptional transposon silencing. LC8 drives PICTS complex dimerization through interaction with conserved motifs in Panoramix. Artificial dimerization of Panoramix bypasses the requirement for Ctp/LC8, demonstrating that LC8's role is to promote complex dimerization.\",\n      \"method\": \"Genetic knockout (loss of Ctp causes transposon de-repression and loss of H3K9me3 marks), artificial dimerization rescue, co-immunoprecipitation, tethering assay\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic rescue with artificial dimerization plus chromatin marks plus co-IP; clear mechanistic demonstration of dimerization function\",\n      \"pmids\": [\"33538693\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LC8/DYNLL1 (rabies virus context) binds the disordered linker of the rabies virus phosphoprotein RavP adjacent to an endogenous dimerization domain, restricting RavP domain orientations and inducing a conformation similar to a more active viral polymerase cofactor state. LC8 interactions are essential for efficient viral polymerase functionality; RavP and LC8 colocalize in rabies-infected cells.\",\n      \"method\": \"NMR, SAXS, molecular modeling, viral minigenome assay, co-localization imaging\",\n      \"journal\": \"Journal of molecular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR and SAXS structural ensemble plus functional viral assay; single lab\",\n      \"pmids\": [\"31634467\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Phage display proteomic screen identifies 29 validated LC8 (DYNLL1) binding partners from the human proteome; all validated peptides contain the canonical TQT motif anchor. Residues outside the TQT anchor critically determine binding, enabling development of the LC8Pred algorithm with ~78% accuracy for predicting LC8-binding motifs.\",\n      \"method\": \"Proteomic phage display, isothermal titration calorimetry validation of 29 peptides, bioinformatic algorithm development\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — systematic ITC validation of multiple interactions; single lab but large-scale approach\",\n      \"pmids\": [\"31266884\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"DYNLL1 binds MRE11 and disrupts the MRE11 dimer to limit DNA end resection. The Shieldin complex is recruited to DSBs hours after DYNLL1, predominantly in G1 cells, and its localization depends on MRE11 activity and is regulated by the DYNLL1-MRE11 interaction. Constitutive association of DYNLL1 with MRE11 can resensitize Shieldin-deficient BRCA1-null cells to PARP inhibitors.\",\n      \"method\": \"Co-immunoprecipitation, DSB localization assays, PARP inhibitor sensitivity, cell-cycle analysis\",\n      \"journal\": \"Nature structural & molecular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mechanistic follow-up to PMID:30464262 establishing temporal and functional dynamics; multiple approaches; independent lab corroborating MRE11 interaction\",\n      \"pmids\": [\"37696958\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Dynll1 forms a persistent complex with mitochondrial cytochrome oxidase Cox4i1 in dendritic cells. Pathogen (Listeria monocytogenes) infection disturbs the Dynll1-Cox4i1 complex; dissociation of this complex is required for release of mitochondrial reactive oxygen species and regulation of intracellular bacterial proliferation. Dynll1 functions as an inhibitor of mitochondrial ROS production.\",\n      \"method\": \"Mass spectrometry, co-immunoprecipitation, ROS measurement, bacterial proliferation assay in dendritic cells\",\n      \"journal\": \"Infection and immunity\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus functional ROS and bacterial survival assays; single lab\",\n      \"pmids\": [\"32041786\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"LC8 (DYNLL1) binds predominantly in-register to the multivalent IDP domain of ASCIZ (which has three LC8 recognition motifs); at substoichiometric concentrations, one motif is preferentially bound. Linker length between motifs and motif specificity drive the in-register binding mode.\",\n      \"method\": \"NMR chemical shift perturbation, analytical ultracentrifugation, native electrospray ionization mass spectrometry, saturation transfer difference NMR\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — rigorous NMR and MS methods but single lab; novel mechanistic insight into multivalent binding\",\n      \"pmids\": [\"32139510\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"ASCIZ and DYNLL1 are essential for development and expansion of MYC-driven B cell lymphoma. DYNLL1 levels are co-activated by ASCIZ and MYC. Deletion of Asciz or Dynll1 prevented abnormal pre-B cell expansion in pre-cancerous Eµ-Myc mice, potentiated MYC-induced apoptosis, and delayed lymphoma development; induced deletion of Asciz in established lymphomas extended survival.\",\n      \"method\": \"Genetic deletion (constitutive and inducible) in Eµ-Myc mouse lymphoma model, flow cytometry, apoptosis assays\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic models with multiple deletion strategies and functional endpoints; replicated across pre-cancerous and malignant stages\",\n      \"pmids\": [\"26832406\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"DYNLL1 (DNCL1) interacts with the C-terminal domain of PAX6 transcription factor; three PAX6 C-terminal mutations found in patients with eye malformations reduce or abolish the PAX6-DNCL1 interaction, suggesting this interaction may be relevant to PAX6-dependent neurological function.\",\n      \"method\": \"Yeast two-hybrid library screen, mutagenesis of PAX6 patient alleles\",\n      \"journal\": \"BMC genetics\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — yeast two-hybrid only, single method, no mechanistic follow-up beyond interaction identification\",\n      \"pmids\": [\"16098226\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"In nitrergic varicosities of mouse gut, LC8 (DYNLL1/PIN) is associated with all cytosolic forms of nNOS (320-, 250-, 155-kDa) but is absent from membrane-associated nNOS. All cytosolic nNOS associated with LC8 is catalytically inactive and serine847-phosphorylated. LC8 does not associate with calmodulin-bound (active) nNOS, suggesting LC8 may transport inactive nNOS to the membrane where it dissociates.\",\n      \"method\": \"Co-immunoprecipitation, subcellular fractionation, in vitro nitric oxide assay\",\n      \"journal\": \"American journal of physiology. Gastrointestinal and liver physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP combined with fractionation and functional NO assay; establishes redox/activity-dependent compartmentalization\",\n      \"pmids\": [\"18635601\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"DYNLL1 directly interacts with two newly characterized targets — African swine fever virus protein p54 and the postsynaptic scaffolding protein gephyrin — through motifs homologous to GIQVD or KXTQT consensus sequences. NMR demonstrates direct interaction and structural modeling shows the overall binding mode is preserved as in other complexes, despite residue-level differences.\",\n      \"method\": \"NMR binding experiments, structural modeling\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct NMR binding demonstration; single method, single lab, no functional readout\",\n      \"pmids\": [\"21094642\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"DLEU1 lncRNA promotes cell survival in esophageal squamous cell carcinoma by binding and stabilizing DYNLL1 protein, interfering with RNF114-mediated ubiquitination and proteasomal degradation of DYNLL1. The DLEU1/DYNLL1 axis upregulates antiapoptotic BCL2. This identifies RNF114 as an E3 ubiquitin ligase that can target DYNLL1 for proteasomal degradation.\",\n      \"method\": \"RNA pulldown, co-immunoprecipitation, ubiquitination assay, siRNA knockdown, xenograft tumor models\",\n      \"journal\": \"Journal of translational medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — RNA pulldown, ubiquitination biochemistry, and cell/in vivo models; single lab identifying a PTM regulatory mechanism for DYNLL1 stability\",\n      \"pmids\": [\"35619131\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"DYNLL1 (LC8) is a small, highly conserved homodimeric hub protein that functions primarily as a dimerization engine: its two symmetric grooves at the dimer interface bind short linear TQT-containing motifs in intrinsically disordered regions of >100 partner proteins, promoting their dimerization or higher-order oligomerization rather than acting as a simple cargo adaptor for dynein. In the DNA damage response, DYNLL1 directly binds MRE11 to disrupt its dimer and limit DNA end resection, and also organizes multimeric 53BP1 complexes to promote 53BP1-dependent NHEJ; together these activities make DYNLL1 a critical determinant of DNA repair pathway choice in BRCA1-deficient cells. DYNLL1 expression is controlled by a feedback loop with the transcription factor ASCIZ, which activates Dynll1 transcription while DYNLL1 protein inhibits ASCIZ's transcriptional activity. Additional established functions include redox-dependent inhibition of NF-κB signaling via IκBα binding, regulation of mitochondrial docking in axons through syntaphilin, facilitation of Pak1 nuclear import through dimerization, control of osteoclastogenesis via NF-κB and MAPK pathways, stabilization of microtubules, and promotion of transposon silencing complex (PICTS) dimerization in the piRNA pathway.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"DYNLL1 (LC8) is a small, highly conserved homodimeric hub protein that functions as a dimerization engine, binding short linear TQT-anchored motifs in intrinsically disordered regions of diverse partners and thereby driving their dimerization or higher-order oligomerization [#0, #17, #25]. The protein exists in a reversible, pH-dependent monomer–dimer equilibrium, and dimerization creates two symmetric hydrophobic grooves at the interface into which a partner peptide inserts as an additional antiparallel beta-strand [#0, #1]. Recognition combines a rigid TQT anchor with flexible flanking contacts, an 'anchored flexibility' mode that explains both the conserved motif requirement and tolerance for sequence diversity, and partner binding can be tuned by phosphorylation immediately N-terminal to the motif [#13, #17]. Through this engine DYNLL1 oligomerizes structurally and functionally unrelated clients, including Nek9, the Ana2 centriole duplication factor, and the Panoramix subunit of the piRNA-pathway PICTS silencing complex, where artificial dimerization fully bypasses the LC8 requirement [#9, #15, #23]. In the DNA damage response DYNLL1 directly binds and disrupts the MRE11 dimer to restrain DNA end resection, while also stimulating 53BP1 oligomerization and its recruitment to double-strand-break chromatin to promote NHEJ; together these activities determine repair pathway choice, and DYNLL1 loss restores homologous recombination and PARP-inhibitor resistance in BRCA1-deficient cells [#19, #20, #26, #22]. DYNLL1 abundance is set by a feedback loop with the transcription factor ASCIZ, which directly activates Dynll1 transcription while DYNLL1 protein binds multivalent motifs in the ASCIZ activation domain to inhibit it; this axis controls Bim-dependent apoptosis in developing B cells and is co-opted in MYC-driven B-cell lymphoma [#8, #11, #28, #29]. Additional characterized roles include redox-regulated inhibition of NF-\\u03baB signaling via I\\u03baB\\u03b1 binding and control of osteoclastogenesis, regulation of axonal mitochondrial docking through syntaphilin, and dimerization-dependent nuclear import of Pak1 [#3, #14, #6, #7].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Established the structural basis for how DYNLL1 binds partners, answering how a small protein recognizes diverse peptides: the dimer presents grooves that accept a partner peptide as a beta-strand.\",\n      \"evidence\": \"X-ray crystallography of the LC8 dimer bound to an nNOS peptide\",\n      \"pmids\": [\"10426949\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Single peptide complex; generality of the binding mode across partners not yet tested\", \"No quantitation of dimerization energetics\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Defined DYNLL1 as a reversible, pH-sensitive monomer–dimer system, showing that the functional binding unit is the dimer and can be regulated by the monomer–dimer equilibrium.\",\n      \"evidence\": \"Analytical ultracentrifugation, SEC, circular dichroism and fluorescence on recombinant LC8\",\n      \"pmids\": [\"11327818\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological relevance of pH-dependent dissociation in cells unaddressed\", \"Does not link equilibrium state to specific partner binding outcomes\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Reframed DYNLL1 from a dynein cargo adaptor to a general dimerization engine by showing cargo peptides bind the same groove with higher affinity than dynein intermediate chain.\",\n      \"evidence\": \"Crystallography, hydrogen-exchange NMR, and ITC comparing dynein IC and Swallow peptides\",\n      \"pmids\": [\"17570393\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional consequence of dimerization tested only in vitro for these partners\", \"Did not enumerate the full client repertoire\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Linked DYNLL1 to redox-controlled NF-\\u03baB signaling, explaining how oxidative stress relieves DYNLL1's inhibition of I\\u03baB\\u03b1 phosphorylation.\",\n      \"evidence\": \"Co-IP, NF-\\u03baB reporter assays, and redox biochemistry showing Cys2 disulfide formation reversed by TRP14\",\n      \"pmids\": [\"18579519\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Stoichiometry of the LC8–I\\u03baB\\u03b1 complex not defined\", \"In vivo significance of the redox switch not established\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Resolved how DYNLL1 engages Pak1, refuting a phosphorylation model and showing binding occurs in the canonical groove requiring dimerization.\",\n      \"evidence\": \"NMR, crystallography, LC8 point mutants, and in vitro kinase assay\",\n      \"pmids\": [\"18650427\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cellular consequence of Pak1 binding not directly tested in this study\", \"Whether binding alters Pak1 catalytic activity unresolved\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Connected DYNLL1 to nNOS activity-state and compartmentalization, indicating it associates selectively with catalytically inactive, phosphorylated cytosolic nNOS.\",\n      \"evidence\": \"Co-IP, subcellular fractionation, and in vitro NO assay in mouse gut nitrergic varicosities\",\n      \"pmids\": [\"18635601\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct binding interface to nNOS not mapped here\", \"Proposed membrane-transport role inferred, not demonstrated\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Demonstrated DYNLL1 controls axonal mitochondrial docking by enhancing the syntaphilin–microtubule interaction, extending the dimerization-engine concept to organelle positioning.\",\n      \"evidence\": \"Co-IP, motif-deletion mutagenesis, live imaging in neurons, and CD on the SNPH coiled-coil\",\n      \"pmids\": [\"19641106\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether DYNLL1 oligomerizes SNPH per se not directly shown\", \"Regulation of the interaction in vivo unaddressed\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Tied DYNLL1-mediated Pak1 dimerization to a functional outcome: EGF-induced nuclear import of Pak1 and developmental rescue.\",\n      \"evidence\": \"Fluorescence import assays in MCF-7 cells and zebrafish morpholino rescue with binding/NLS mutants\",\n      \"pmids\": [\"19557173\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single-lab finding without reciprocal structural validation in cells\", \"Mechanism connecting dimerization to NLS exposure not defined\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Established the ASCIZ–DYNLL1 transcriptional feedback loop, explaining how cellular DYNLL1 levels are homeostatically set.\",\n      \"evidence\": \"ChIP, promoter reporter, and co-IP across human, mouse, and chicken cells\",\n      \"pmids\": [\"22167198\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Quantitative threshold of DYNLL1 needed to inhibit ASCIZ unclear\", \"Other transcriptional inputs to Dynll1 not explored\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Showed DYNLL1 binding multimerizes Nek9 and inserts a phospho-regulated switch into spindle-kinase signaling.\",\n      \"evidence\": \"Co-IP, kinase activity assays, mutagenesis, and SEC on the Nek9/Nek6 module\",\n      \"pmids\": [\"21454704\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cellular spindle phenotypes of disrupting the interaction not detailed here\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Mapped DYNLL1 binding to multiple SQ/TQ motifs in ATMIN/ASCIZ and showed reciprocal effects on localization, supporting the multivalent feedback model.\",\n      \"evidence\": \"Yeast two-hybrid, pepscan, NMR-modeled complexes, and co-expression imaging\",\n      \"pmids\": [\"21971545\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Binding stoichiometry resolved only later\", \"Functional consequence on transcription not measured here\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Placed DYNLL1 downstream of ASCIZ in B-cell development by genetic epistasis, showing the lymphopenia of ASCIZ loss runs through DYNLL1 and Bim-dependent apoptosis.\",\n      \"evidence\": \"Ectopic Dynll1 rescue and Bim-knockout epistasis with flow cytometry in mice\",\n      \"pmids\": [\"22891272\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct DYNLL1 control of Bim at the molecular level not dissected here\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Implicated DYNLL1 in microtubule assembly and mitotic spindle stability, broadening its cytoskeletal roles.\",\n      \"evidence\": \"In vitro MT assembly, immunofluorescence in Drosophila and HeLa, siRNA/overexpression, docking\",\n      \"pmids\": [\"23038268\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct tubulin-binding interface unresolved\", \"Single-lab, not independently replicated\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Provided the structural mechanism for phosphorylation-gated partner binding, showing pSer944 immediately N-terminal to the Nek9 motif weakens LC8 affinity.\",\n      \"evidence\": \"Crystal structures of phosphorylated/unphosphorylated peptides plus ITC\",\n      \"pmids\": [\"23482567\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Generality of N-terminal phospho-regulation across other partners not surveyed\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Extended DYNLL1's NF-\\u03baB-inhibitory role to osteoclast biology and bone homeostasis in vivo.\",\n      \"evidence\": \"Osteoclast differentiation assays, Western blots, LC8-transgenic mice, ovariectomy model\",\n      \"pmids\": [\"23293355\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab; direct binding partners in the MAPK arm not mapped\", \"Mild phenotype leaves contribution magnitude uncertain\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Demonstrated DYNLL1 builds defined higher-order assemblies, dimers bridging two Ana2 sites to drive Ana2 tetramerization in centriole duplication.\",\n      \"evidence\": \"Two crystal structures, SEC-MALS stoichiometry, and ITC\",\n      \"pmids\": [\"24920673\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cellular requirement for the tetramer in centriole duplication inferred from structure\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Implicated DYNLL1 with Arl3-GTP in regulating dynein–dynactin association, retaining a connection to the motor system.\",\n      \"evidence\": \"Co-IP, MT pull-down, quantum-dot tracing, live imaging, siRNA\",\n      \"pmids\": [\"25342295\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism by which LC8 promotes dynactin detachment not structurally defined\", \"Single lab\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Defined the 'anchored flexibility' recognition model reconciling the strict TQT requirement with broad sequence tolerance among partners.\",\n      \"evidence\": \"Crystallography of a Chica peptide complex with NMR dynamics and ITC\",\n      \"pmids\": [\"26652654\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Predictive power across the proteome addressed only by later screening\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Showed viral proteins exploit DYNLL1 as a dimerization cofactor, with VP35 binding stabilizing its oligomerization domain to enhance viral RNA synthesis.\",\n      \"evidence\": \"Direct binding, Ebola minigenome assay, and VP35 motif mutagenesis\",\n      \"pmids\": [\"25741013\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural detail of the VP35–LC8 complex not resolved here\", \"Single lab\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Revealed DYNLL1 as a direct inhibitor of DNA end resection, binding MRE11 and limiting nucleolytic processing to enforce repair pathway choice.\",\n      \"evidence\": \"CRISPR loss-of-function screen, in vitro end-resection biochemistry, co-IP, HR/NHEJ assays\",\n      \"pmids\": [\"30464262\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of MRE11 inhibition resolved structurally only later\", \"Interplay with shieldin not yet defined here\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Showed DYNLL1 organizes 53BP1 oligomers to promote NHEJ and class switch recombination, and that its loss confers PARP-inhibitor resistance in BRCA1-mutant cells.\",\n      \"evidence\": \"Co-IP, CSR assays, Dynll1/Asciz deletion, 53BP1 oligomerization and PARPi sensitivity in cells and tumors\",\n      \"pmids\": [\"30559443\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Stoichiometry of 53BP1 oligomers in chromatin not defined\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Placed DYNLL1 within the canonical DSB signaling cascade, showing its 53BP1-dependent recruitment to damage tracks and checkpoint function.\",\n      \"evidence\": \"Laser micro-irradiation, genetic inactivation, checkpoint readouts, PARPi sensitivity\",\n      \"pmids\": [\"30982887\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct chromatin-binding versus 53BP1-mediated recruitment not fully separated\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Demonstrated the dimerization-engine function in the piRNA pathway, where artificial dimerization of Panoramix bypasses the LC8 requirement for transposon silencing.\",\n      \"evidence\": \"Ctp knockout, artificial dimerization rescue, co-IP, and tethering assays in Drosophila\",\n      \"pmids\": [\"33538693\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether mammalian DYNLL1 has an analogous silencing client unaddressed\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showed DYNLL1 reshapes a viral phosphoprotein's conformational ensemble, restricting RavP domain orientation toward an active polymerase-cofactor state.\",\n      \"evidence\": \"NMR, SAXS, modeling, rabies minigenome assay, co-localization\",\n      \"pmids\": [\"31634467\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional model based on ensemble inference; single lab\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Systematically mapped the human LC8 interactome and built a predictive motif algorithm, confirming the TQT anchor with flanking-residue determinants.\",\n      \"evidence\": \"Proteomic phage display with ITC validation of 29 peptides and LC8Pred development\",\n      \"pmids\": [\"31266884\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Predicted partners require individual functional validation\", \"Prediction accuracy ~78%\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Resolved how DYNLL1 multivalently engages ASCIZ, binding in-register across its three motifs with linker length and motif specificity governing the mode.\",\n      \"evidence\": \"NMR, AUC, native ESI-MS, and STD-NMR on the ASCIZ IDP domain\",\n      \"pmids\": [\"32139510\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab; in-register binding consequences for transcriptional output not measured\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Refined the resection mechanism, showing DYNLL1 disrupts the MRE11 dimer and coordinates timing with shieldin recruitment at breaks.\",\n      \"evidence\": \"Co-IP, DSB localization, cell-cycle analysis, PARPi sensitivity\",\n      \"pmids\": [\"37696958\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structure of the DYNLL1–MRE11 complex not solved here\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Identified a mitochondrial DYNLL1–Cox4i1 complex acting as a brake on ROS, dissociated upon pathogen infection to control bacterial proliferation.\",\n      \"evidence\": \"Mass spectrometry, co-IP, ROS and bacterial proliferation assays in dendritic cells\",\n      \"pmids\": [\"32041786\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether this depends on canonical TQT-motif binding unknown\", \"Single lab\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Established the ASCIZ–DYNLL1 axis as a driver of MYC-induced B-cell lymphoma, with co-activation by ASCIZ and MYC and a tumor-promoting, apoptosis-restraining role.\",\n      \"evidence\": \"Constitutive and inducible Asciz/Dynll1 deletion in E\\u00b5-Myc mice with flow cytometry and apoptosis assays\",\n      \"pmids\": [\"26832406\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether DNA-repair versus apoptotic functions dominate tumorigenesis not separated\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Showed isoform-selective dimerization of a myelin glycoprotein, with DYNLL1 forming a 2:2 heterotetramer dimerizing L-MAG but not S-MAG.\",\n      \"evidence\": \"Yeast two-hybrid, in vitro binding, crystallography, and SAXS\",\n      \"pmids\": [\"30261098\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cellular consequence for myelin-to-axon signaling not directly tested\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Defined post-translational control of DYNLL1 stability, identifying RNF114-mediated ubiquitination antagonized by DLEU1 lncRNA in esophageal carcinoma.\",\n      \"evidence\": \"RNA pulldown, co-IP, ubiquitination assay, siRNA, xenografts\",\n      \"pmids\": [\"35619131\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct RNF114 ubiquitination site on DYNLL1 not mapped\", \"Single lab\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Reported an early DYNLL1–PAX6 interaction with patient mutations weakening binding, hinting at relevance to PAX6-dependent development.\",\n      \"evidence\": \"Yeast two-hybrid library screen and PAX6 patient-allele mutagenesis\",\n      \"pmids\": [\"16098226\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Yeast two-hybrid only, no orthogonal validation\", \"No mechanistic or in vivo follow-up\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How DYNLL1's competing roles across DNA repair, transcriptional feedback, cytoskeleton, and organelle/redox control are partitioned and prioritized within a single cell remains unresolved.\",\n      \"evidence\": null,\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No model integrating partner competition for the limited groove pool\", \"No structure of the DYNLL1–MRE11 complex\", \"Quantitative rules governing which clients dominate at given DYNLL1 levels unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 2, 17, 25]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [9, 19, 26, 23]},\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [12, 16]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [31, 7]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [19, 20, 22]},\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [6, 27]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [12]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-73894\", \"supporting_discovery_ids\": [19, 20, 22, 26]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [8, 28]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [3, 14]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [11, 29]},\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [23]}\n    ],\n    \"complexes\": [\n      \"PICTS complex (Panoramix-Nxf2-Nxt1)\",\n      \"MRN complex (with MRE11)\",\n      \"53BP1 oligomeric complex\",\n      \"Nek9/Nek6/7 spindle kinase module\"\n    ],\n    \"partners\": [\n      \"ASCIZ\",\n      \"MRE11\",\n      \"53BP1\",\n      \"Nek9\",\n      \"SNPH\",\n      \"Pak1\",\n      \"I\\u03baB\\u03b1\",\n      \"Ana2\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}