{"gene":"VPS11","run_date":"2026-04-28T23:00:23","timeline":{"discoveries":[{"year":1990,"finding":"Yeast PEP5/VPS11 gene product is a peripheral vacuolar membrane protein of ~107 kDa required for vacuolar hydrolase maturation; loss-of-function causes accumulation of inactive precursors to vacuolar hydrolases and vestigial vacuole morphology.","method":"Gene deletion/disruption, complementation, cell fractionation, immunoblot with anti-PEP5 antibodies","journal":"Genetics","confidence":"High","confidence_rationale":"Tier 2 — clean KO with defined cellular phenotype, fractionation demonstrating peripheral vacuolar membrane localization, replicated in multiple follow-up studies","pmids":["2204580"],"is_preprint":false},{"year":1998,"finding":"Genetic epistasis in yeast shows that VPS11/PEP5 functions both at the Golgi-to-prevacuolar compartment step (where Vps8p acts) and more proximally at the vacuole; the vps8-200 allele partially suppresses the pep5 vestigial vacuole phenotype, restoring mature vacuolar hydrolases, indicating VPS11 is bifunctional across multiple transport pathways to the vacuole.","method":"Genetic epistasis/suppressor analysis; double-mutant phenotypic characterization of vacuolar morphology and hydrolase activity","journal":"Genetics","confidence":"Medium","confidence_rationale":"Tier 2 — epistasis with defined phenotypic readouts, single study","pmids":["9475722"],"is_preprint":false},{"year":2016,"finding":"The human VPS11 C846G missense mutation in the RING-H2 domain causes aberrant ubiquitination and accelerated turnover of VPS11 protein, compromised VPS11-VPS18 complex assembly, impaired autophagic activity in human cells, and reduced CNS myelination in zebrafish with truncated RING-H2 domain.","method":"Exome sequencing for variant identification; immunoblot for protein stability; co-immunoprecipitation for VPS11-VPS18 complex assembly; autophagy flux assay in human cells; zebrafish vps11 mutant CNS myelination analysis","journal":"PLoS genetics","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods (co-IP, functional assay, in vivo model) in a single study with rigorous controls","pmids":["27120463"],"is_preprint":false},{"year":2015,"finding":"The yeast homolog of the human VPS11 C846G mutation (p.Cys846Gly) shows moderate impairment of fusion of the late endosome to the vacuole, as demonstrated by the Mup1-GFP transport assay in mutant yeast.","method":"Mup1-GFP transport assay in Saccharomyces cerevisiae homologous mutant","journal":"Journal of medical genetics","confidence":"Medium","confidence_rationale":"Tier 2 — functional transport assay in yeast ortholog, single study","pmids":["26307567"],"is_preprint":false},{"year":2019,"finding":"Vps11 (and Vps18), as common subunits of the HOPS/CORVET complexes, possess intrinsic E3 ubiquitin ligase activity; overexpression perturbs ubiquitination in signal transduction pathways including Wnt, ERα, and NFκB; specifically, Vps11/18-mediated ubiquitination of the scaffold protein PELP1 impairs ERα activation by c-Src.","method":"Overexpression experiments, ubiquitination assays, signaling pathway readouts (Wnt, ERα, NFκB reporters), co-immunoprecipitation of PELP1 ubiquitination","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1-2 — enzymatic E3 ligase activity demonstrated with multiple substrates and pathways, mechanistic link to PELP1/ERα/c-Src established","pmids":["31015428"],"is_preprint":false},{"year":2015,"finding":"Toxoplasma gondii Vps11 (ortholog of human VPS11) is a component of HOPS and CORVET tethering complexes; it associates dynamically with Golgi endosomal-related compartments, the vacuole, and immature apical secretory organelles; conditional knockdown disrupts biogenesis of dense granules, rhoptries, and micronemes, impairing parasite motility, invasion, egress, and intracellular growth.","method":"Conditional knockdown (regulatable expression), immunofluorescence/co-localization, phenotypic analysis of organelle biogenesis and parasite function","journal":"Cellular microbiology","confidence":"High","confidence_rationale":"Tier 2 — conditional KD with multiple defined organelle and functional phenotypes, orthogonal localization data","pmids":["25640905"],"is_preprint":false},{"year":2011,"finding":"Loss of zebrafish Vps11 (platinum mutant) results in absence of mature melanosomes and gradual loss of RPE integrity; Vps11 is essential for melanosome maturation but not for initiation of melanin biosynthesis or normal retinal development, establishing its role in late-stage vesicular trafficking in pigment cells.","method":"Bulked segregant analysis, candidate gene sequencing, phenocopy by morpholino, rescue experiments, histology, immunohistochemistry, transmission electron microscopy","journal":"Investigative ophthalmology & visual science","confidence":"High","confidence_rationale":"Tier 2 — genetic identification confirmed by phenocopy and rescue, multiple imaging modalities, defined cellular phenotype","pmids":["21330665"],"is_preprint":false},{"year":2013,"finding":"In zebrafish vps11(w66) mutants, loss of Vps11 leads to caspase-independent, cathepsin-dependent chromatophore death; increased autophagosome marker LC3B-II accumulation and premature chromatophore death are rescued by cathepsin/calpain inhibitor ALLM or bafilomycin A1 (V-ATPase inhibitor), indicating Vps11 promotes melanophore survival by suppressing aberrant cathepsin release/activity.","method":"TUNEL analysis, caspase inhibitor treatment, western blot for PARP-1 cleavage and LC3B, pharmacological rescue with ALLM and bafilomycin A1","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 — multiple orthogonal pharmacological and biochemical methods, single study","pmids":["23724125"],"is_preprint":false},{"year":2014,"finding":"Knockdown of Vps11 (core subunit of HOPS and CORVET) in human cells increases retrograde transport of Shiga toxin and ricin to the Golgi, increases their toxicity, and restores reduced Gb3 glycolipid levels caused by moesin depletion, placing Vps11 as a negative regulator of retrograde toxin transport and glycolipid degradation.","method":"siRNA knockdown, retrograde transport assays for Shiga toxin and ricin, cytotoxicity assays, Gb3 level measurement","journal":"Communicative & integrative biology","confidence":"Medium","confidence_rationale":"Tier 3 — functional KD with defined transport phenotypes, multiple readouts, single study","pmids":["24778763"],"is_preprint":false},{"year":2021,"finding":"VPS11 protein is strongly expressed in mouse oligodendrocytes and localizes with Myelin Associated Glycoprotein (MAG) in the inner tongue of myelin; co-localization with PDGFRα in round vesicles of OPCs/oligodendrocytes in vitro and in vivo suggests VPS11 participates in retrograde endolysosomal transport from the myelin inner tongue to the oligodendrocyte perikaryon.","method":"Immunocytochemistry, immunofluorescent co-localization (Vps11/MAG, Vps11/MBP, Vps11/neurofilament, Vps11/PDGFRα) in mouse tissue and cultured cells","journal":"ASN neuro","confidence":"Medium","confidence_rationale":"Tier 3 — direct localization with functional context, single study, no KO/KD functional validation","pmids":["33874780"],"is_preprint":false},{"year":2021,"finding":"A novel homozygous VPS11 variant associated with adult-onset generalized dystonia causes marked lysosomal and autophagic abnormalities in patient fibroblasts; these abnormalities are rescued by overexpression of wild-type VPS11 protein, confirming a loss-of-function mechanism.","method":"Functional studies in patient fibroblasts: lysosomal and autophagic assays; rescue by wild-type VPS11 overexpression","journal":"Annals of neurology","confidence":"Medium","confidence_rationale":"Tier 2 — loss-of-function with defined cellular phenotype plus rescue, single study","pmids":["33452836"],"is_preprint":false},{"year":2024,"finding":"ALKBH5, an m6A demethylase, removes m6A modification from VPS11 mRNA to promote its translation; loss of ALKBH5 reduces VPS11 protein levels, impairing autophagic flux (autophagosome-lysosome fusion) and promoting hepatic lipid accumulation; VPS11 overexpression reverses lipid accumulation in ALKBH5-silenced hepatocytes.","method":"RNA-sequencing, methylated RNA immunoprecipitation-qPCR (MeRIP-qPCR), stable overexpression/knockdown, autophagy flux assays (LC3B, p62), rescue by VPS11 overexpression","journal":"The FEBS journal","confidence":"Medium","confidence_rationale":"Tier 2 — m6A modification of VPS11 mRNA confirmed by MeRIP-qPCR, functional rescue, multiple orthogonal methods, single study","pmids":["39434426"],"is_preprint":false},{"year":2022,"finding":"miR-542-3p targets the 3' UTR of human VPS11 mRNA (seed sequence absent in mouse/rat), reducing VPS11 expression in human macrophages upon M. tuberculosis infection; VPS11 overexpression antagonizes miR-542-3p-mediated promotion of mycobacterial survival by restoring autophagy.","method":"Luciferase reporter assay, RNA pulldown, RNA immunoprecipitation, VPS11 overexpression in human macrophages, autophagy assays","journal":"Microbial pathogenesis","confidence":"Medium","confidence_rationale":"Tier 2 — direct miR-542-3p/VPS11 interaction validated by multiple binding assays, functional rescue, single study","pmids":["35662671"],"is_preprint":false}],"current_model":"VPS11 is a core subunit of the HOPS and CORVET endolysosomal tethering complexes that functions as a peripheral vacuolar/endosomal membrane protein required for vesicle docking and fusion across multiple trafficking pathways (Golgi→prevacuole, late endosome→lysosome, autophagosome→lysosome); it possesses intrinsic E3 ubiquitin ligase activity through its RING-H2 domain (enabling fine-tuning of Wnt, ERα, and NFκB signaling via substrate ubiquitination), is essential for melanosome maturation, myelin maintenance, and autophagic flux, and its expression is post-transcriptionally regulated by m6A modification of its mRNA and by miR-542-3p."},"narrative":{"teleology":[{"year":1990,"claim":"Establishing VPS11 as a peripheral vacuolar membrane protein required for vacuolar hydrolase maturation answered the fundamental question of where and why VPS11 acts in the endomembrane system.","evidence":"Gene disruption, complementation, cell fractionation, and immunoblotting in S. cerevisiae","pmids":["2204580"],"confidence":"High","gaps":["No interacting partners or complexes identified","Mechanism of membrane association unknown","Role limited to vacuolar hydrolase sorting; broader trafficking functions not explored"]},{"year":1998,"claim":"Epistasis analysis revealed that VPS11 is bifunctional, acting at both the Golgi-to-prevacuolar and vacuolar fusion steps, broadening VPS11 from a single-pathway component to a multi-step trafficking factor.","evidence":"Genetic suppressor analysis of vps8-200/pep5 double mutants in yeast with vacuolar morphology and hydrolase activity readouts","pmids":["9475722"],"confidence":"Medium","gaps":["Whether VPS11 acts in distinct complexes at each step was unknown","Direct biochemical interaction with Vps8 not tested"]},{"year":2011,"claim":"Identification of VPS11 as essential for melanosome maturation in zebrafish extended its trafficking role to specialized lysosome-related organelles in vertebrates, separating its function from melanin biosynthesis initiation.","evidence":"Bulked segregant analysis, morpholino phenocopy, genetic rescue, TEM in zebrafish platinum mutant","pmids":["21330665"],"confidence":"High","gaps":["Step at which melanosome biogenesis is blocked not molecularly defined","HOPS/CORVET complex involvement in melanosomes not directly tested"]},{"year":2013,"claim":"Demonstrating that Vps11 loss leads to caspase-independent, cathepsin-dependent cell death with autophagosome accumulation established that VPS11 is required for autophagic flux and lysosomal integrity in vivo.","evidence":"Pharmacological rescue (ALLM, bafilomycin A1), LC3B-II western blot, TUNEL analysis in zebrafish vps11(w66) mutant chromatophores","pmids":["23724125"],"confidence":"Medium","gaps":["Whether autophagosome accumulation reflects fusion block vs. degradation block not distinguished","Mechanism of cathepsin release not defined"]},{"year":2015,"claim":"Functional characterization of the VPS11 C846G RING-H2 domain mutation in yeast and human cells established that this domain is critical for protein stability, VPS11–VPS18 complex integrity, autophagic activity, and CNS myelination, linking VPS11 to a leukoencephalopathy.","evidence":"Yeast Mup1-GFP transport assay; co-IP for VPS11–VPS18 assembly; autophagy flux assays in human cells; zebrafish myelination analysis; patient exome sequencing","pmids":["26307567","27120463"],"confidence":"High","gaps":["Whether RING-H2 E3 ligase activity per se is required for tethering complex function vs. structural integrity not separated","Full patient phenotype-genotype correlation limited to single family"]},{"year":2015,"claim":"Conditional knockdown of Vps11 in Toxoplasma gondii demonstrated that HOPS/CORVET-mediated vesicular trafficking is essential for biogenesis of multiple secretory organelles and parasite virulence, generalizing VPS11 function across eukaryotes.","evidence":"Conditional knockdown, immunofluorescence co-localization, phenotypic assays for organelle biogenesis, invasion, and growth in T. gondii","pmids":["25640905"],"confidence":"High","gaps":["Specific HOPS vs. CORVET contribution not separated","Direct physical association of TgVps11 with tethering complex subunits not biochemically demonstrated"]},{"year":2019,"claim":"Discovery that VPS11 possesses intrinsic E3 ubiquitin ligase activity via its RING-H2 domain, with the ability to ubiquitinate PELP1 and modulate Wnt, ERα, and NF-κB signaling, revealed a signaling regulatory function independent of its canonical tethering role.","evidence":"In vitro ubiquitination assays, overexpression studies, signaling pathway reporters, co-IP of PELP1 ubiquitination","pmids":["31015428"],"confidence":"High","gaps":["Endogenous-level E3 ligase activity not confirmed; findings rely on overexpression","Substrate specificity and physiological relevance under endogenous conditions not established","Whether E3 activity is separable from tethering function in vivo not tested"]},{"year":2021,"claim":"Localization of VPS11 to the myelin inner tongue with MAG and to PDGFRα-positive vesicles in oligodendrocytes suggested VPS11 participates in retrograde endolysosomal transport from the myelin sheath to the cell body, providing anatomical context for VPS11-associated leukoencephalopathy.","evidence":"Immunocytochemistry and immunofluorescence co-localization in mouse brain tissue and cultured oligodendrocytes","pmids":["33874780"],"confidence":"Medium","gaps":["No functional KO/KD in oligodendrocytes to validate trafficking role","Co-localization alone does not establish direct functional interaction with MAG or PDGFRα"]},{"year":2021,"claim":"Demonstration that a novel VPS11 variant causes adult-onset generalized dystonia with lysosomal and autophagic abnormalities rescuable by wild-type VPS11 expanded the disease spectrum beyond leukoencephalopathy.","evidence":"Functional studies in patient fibroblasts with lysosomal/autophagic assays and rescue by wild-type VPS11 overexpression","pmids":["33452836"],"confidence":"Medium","gaps":["Single family study; independent confirmation pending","Specific step in autophagosome–lysosome fusion that is disrupted not defined"]},{"year":2022,"claim":"Identification of miR-542-3p as a direct negative regulator of VPS11 mRNA in human macrophages during M. tuberculosis infection revealed a pathogen immune-evasion strategy that exploits VPS11-dependent autophagy.","evidence":"Luciferase reporter assay, RNA pulldown, RNA immunoprecipitation, VPS11 overexpression rescue in human macrophages","pmids":["35662671"],"confidence":"Medium","gaps":["Species-specific (human) miRNA targeting—mouse/rat validation not possible","Whether other HOPS/CORVET subunits are co-regulated by miR-542-3p not tested"]},{"year":2024,"claim":"Showing that m6A modification of VPS11 mRNA, regulated by ALKBH5 demethylase, controls VPS11 translation and thereby autophagic flux and hepatic lipid homeostasis uncovered an epitranscriptomic layer of VPS11 regulation.","evidence":"MeRIP-qPCR, ALKBH5 knockdown/overexpression, autophagy flux assays, rescue by VPS11 overexpression in hepatocytes","pmids":["39434426"],"confidence":"Medium","gaps":["Specific m6A site(s) on VPS11 mRNA not mapped","In vivo hepatic phenotype of VPS11 loss not directly tested","Reader protein mediating m6A-dependent translational regulation of VPS11 not identified"]},{"year":null,"claim":"Key unresolved questions include whether VPS11's E3 ligase activity is physiologically relevant at endogenous expression levels, how the RING-H2 domain's enzymatic and structural roles are balanced within the HOPS/CORVET complex, and what the complete genotype–phenotype spectrum is for VPS11 loss-of-function in the human nervous system.","evidence":"","pmids":[],"confidence":"High","gaps":["Endogenous-level E3 ligase substrates not identified by unbiased proteomics","Structural basis for VPS11 within HOPS/CORVET not resolved at atomic level in human","Full phenotypic spectrum of human VPS11 mutations across tissues not systematically catalogued"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0016874","term_label":"ligase activity","supporting_discovery_ids":[4]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[4]}],"localization":[{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[0,1,5,8]},{"term_id":"GO:0005764","term_label":"lysosome","supporting_discovery_ids":[0,6,7,10]},{"term_id":"GO:0005794","term_label":"Golgi apparatus","supporting_discovery_ids":[1,5]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[0,1,3,5,6,8]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[2,7,10,11,12]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[4]},{"term_id":"R-HSA-1852241","term_label":"Organelle biogenesis and maintenance","supporting_discovery_ids":[5,6]}],"complexes":["HOPS complex","CORVET complex"],"partners":["VPS18","PELP1","ALKBH5"],"other_free_text":[]},"mechanistic_narrative":"VPS11 is a core subunit of the HOPS and CORVET endolysosomal tethering complexes, functioning as a peripheral vacuolar/endosomal membrane protein essential for vesicle docking and fusion across multiple trafficking pathways including Golgi-to-prevacuolar transport, late endosome-to-lysosome fusion, autophagosome-lysosome fusion, and melanosome maturation [PMID:2204580, PMID:9475722, PMID:21330665, PMID:27120463]. Beyond its tethering role, VPS11 possesses intrinsic E3 ubiquitin ligase activity through its C-terminal RING-H2 domain, enabling ubiquitination of substrates such as PELP1 to modulate Wnt, ERα, and NF-κB signaling [PMID:31015428]. Disease-causing mutations in the VPS11 RING-H2 domain destabilize the protein, impair VPS11–VPS18 complex assembly, compromise autophagic flux, and reduce CNS myelination, linking VPS11 loss-of-function to leukoencephalopathy and adult-onset generalized dystonia [PMID:27120463, PMID:33452836]. VPS11 expression is post-transcriptionally regulated by m6A modification of its mRNA (removed by ALKBH5) and by miR-542-3p, which suppresses VPS11 in human macrophages during mycobacterial infection to subvert autophagic clearance [PMID:39434426, PMID:35662671]."},"prefetch_data":{"uniprot":{"accession":"Q9H270","full_name":"Vacuolar protein sorting-associated protein 11 homolog","aliases":["RING finger protein 108"],"length_aa":941,"mass_kda":107.8,"function":"Plays a role in vesicle-mediated protein trafficking to lysosomal compartments including the endocytic membrane transport and autophagic pathways. Believed to act as a core component of the putative HOPS and CORVET endosomal tethering complexes which are proposed to be involved in the Rab5-to-Rab7 endosome conversion probably implicating MON1A/B, and via binding SNAREs and SNARE complexes to mediate tethering and docking events during SNARE-mediated membrane fusion. The HOPS complex is proposed to be recruited to Rab7 on the late endosomal membrane and to regulate late endocytic, phagocytic and autophagic traffic towards lysosomes. The CORVET complex is proposed to function as a Rab5 effector to mediate early endosome fusion probably in specific endosome subpopulations (PubMed:11382755, PubMed:23351085, PubMed:24554770, PubMed:25266290, PubMed:25783203). Required for fusion of endosomes and autophagosomes with lysosomes (PubMed:25783203). Involved in cargo transport from early to late endosomes and required for the transition from early to late endosomes (PubMed:21148287). Involved in the retrograde Shiga toxin transport (PubMed:23593995)","subcellular_location":"Endosome; Late endosome membrane; Lysosome membrane; Early endosome; Cytoplasmic vesicle; Cytoplasmic vesicle, autophagosome; Cytoplasmic vesicle, clathrin-coated vesicle","url":"https://www.uniprot.org/uniprotkb/Q9H270/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/VPS11","classification":"Not Classified","n_dependent_lines":20,"n_total_lines":74,"dependency_fraction":0.2702702702702703},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"VPS18","stoichiometry":10.0},{"gene":"TGFBRAP1","stoichiometry":4.0},{"gene":"VPS16","stoichiometry":0.2},{"gene":"VPS33A","stoichiometry":0.2},{"gene":"VPS8","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/VPS11","total_profiled":1310},"omim":[{"mim_id":"619637","title":"DYSTONIA 32; DYT32","url":"https://www.omim.org/entry/619637"},{"mim_id":"616694","title":"ECM29 PROTEASOME ADAPTOR AND SCAFFOLD PROTEIN; ECPAS","url":"https://www.omim.org/entry/616694"},{"mim_id":"616683","title":"LEUKODYSTROPHY, HYPOMYELINATING, 12; HLD12","url":"https://www.omim.org/entry/616683"},{"mim_id":"610034","title":"VPS33A CORE SUBUNIT OF CORVET AND HOPS COMPLEXES; VPS33A","url":"https://www.omim.org/entry/610034"},{"mim_id":"608552","title":"VPS33B LATE ENDOSOME AND LYSOSOME ASSOCIATED; VPS33B","url":"https://www.omim.org/entry/608552"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Cytosol","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/VPS11"},"hgnc":{"alias_symbol":["RNF108","PEP5"],"prev_symbol":[]},"alphafold":{"accession":"Q9H270","domains":[{"cath_id":"1.25.40","chopping":"688-767","consensus_level":"high","plddt":71.9149,"start":688,"end":767}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9H270","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9H270-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9H270-F1-predicted_aligned_error_v6.png","plddt_mean":78.56},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=VPS11","jax_strain_url":"https://www.jax.org/strain/search?query=VPS11"},"sequence":{"accession":"Q9H270","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9H270.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9H270/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9H270"}},"corpus_meta":[{"pmid":"7556197","id":"PMC_7556197","title":"Nucleotide sequence of the lantibiotic Pep5 biosynthetic gene cluster and functional analysis of PepP and PepC. 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vacuolar protein sorting 11 (vps11) causes retinal pathogenesis in a vertebrate model of syndromic albinism.","date":"2011","source":"Investigative ophthalmology & visual science","url":"https://pubmed.ncbi.nlm.nih.gov/21330665","citation_count":29,"is_preprint":false},{"pmid":"33452836","id":"PMC_33452836","title":"A Novel Homozygous VPS11 Variant May Cause Generalized Dystonia.","date":"2021","source":"Annals of neurology","url":"https://pubmed.ncbi.nlm.nih.gov/33452836","citation_count":26,"is_preprint":false},{"pmid":"27473128","id":"PMC_27473128","title":"The second report of a new hypomyelinating disease due to a defect in the VPS11 gene discloses a massive lysosomal involvement.","date":"2016","source":"Journal of inherited metabolic disease","url":"https://pubmed.ncbi.nlm.nih.gov/27473128","citation_count":26,"is_preprint":false},{"pmid":"23724125","id":"PMC_23724125","title":"Maintenance of melanophore morphology and survival is cathepsin and vps11 dependent in zebrafish.","date":"2013","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/23724125","citation_count":20,"is_preprint":false},{"pmid":"29945969","id":"PMC_29945969","title":"A Missense Mutation in the Vacuolar Protein Sorting 11 (VPS11) Gene Is Associated with Neuroaxonal Dystrophy in Rottweiler Dogs.","date":"2018","source":"G3 (Bethesda, Md.)","url":"https://pubmed.ncbi.nlm.nih.gov/29945969","citation_count":19,"is_preprint":false},{"pmid":"17083489","id":"PMC_17083489","title":"Reduced expression of vps11 causes less pigmentation in medaka, Oryzias latipes.","date":"2006","source":"Pigment cell research","url":"https://pubmed.ncbi.nlm.nih.gov/17083489","citation_count":14,"is_preprint":false},{"pmid":"9475722","id":"PMC_9475722","title":"Genetic interaction with vps8-200 allows partial suppression of the vestigial vacuole phenotype caused by a pep5 mutation in Saccharomyces cerevisiae.","date":"1998","source":"Genetics","url":"https://pubmed.ncbi.nlm.nih.gov/9475722","citation_count":11,"is_preprint":false},{"pmid":"35241734","id":"PMC_35241734","title":"Vision and sensorimotor defects associated with loss of Vps11 function in a zebrafish model of genetic leukoencephalopathy.","date":"2022","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/35241734","citation_count":8,"is_preprint":false},{"pmid":"38832774","id":"PMC_38832774","title":"The two-component regulatory systems GraRS and SrrAB mediate Staphylococcus aureus susceptibility to Pep5 produced by clinical isolate of Staphylococcus epidermidis.","date":"2024","source":"Applied and environmental microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/38832774","citation_count":6,"is_preprint":false},{"pmid":"30977151","id":"PMC_30977151","title":"Melanosome maturation proteins Oca2, Mitfa and Vps11 are differentially required for cisplatin resistance in zebrafish melanocytes.","date":"2019","source":"Experimental dermatology","url":"https://pubmed.ncbi.nlm.nih.gov/30977151","citation_count":6,"is_preprint":false},{"pmid":"36444195","id":"PMC_36444195","title":"Multi-Layered PLGA-PEI Nanoparticles Functionalized with TKD Peptide for Targeted Delivery of Pep5 to Breast Tumor Cells and Spheroids.","date":"2022","source":"International journal of nanomedicine","url":"https://pubmed.ncbi.nlm.nih.gov/36444195","citation_count":6,"is_preprint":false},{"pmid":"24778763","id":"PMC_24778763","title":"Vps11, a subunit of the tethering complexes HOPS and CORVET, is involved in regulation of glycolipid degradation and retrograde toxin transport.","date":"2014","source":"Communicative & integrative biology","url":"https://pubmed.ncbi.nlm.nih.gov/24778763","citation_count":5,"is_preprint":false},{"pmid":"30833431","id":"PMC_30833431","title":"Pep5, a Fragment of Cyclin D2, Shows Antiparasitic Effects in Different Stages of the Trypanosoma cruzi Life Cycle and Blocks Parasite Infectivity.","date":"2019","source":"Antimicrobial agents and chemotherapy","url":"https://pubmed.ncbi.nlm.nih.gov/30833431","citation_count":5,"is_preprint":false},{"pmid":"33874780","id":"PMC_33874780","title":"Characterization of the Expression of Vacuolar Protein Sorting 11 (Vps11) in Mammalian Oligodendrocytes.","date":"2021","source":"ASN neuro","url":"https://pubmed.ncbi.nlm.nih.gov/33874780","citation_count":3,"is_preprint":false},{"pmid":"35452935","id":"PMC_35452935","title":"Pep5-based antitumor peptides containing multifunctional fragments with enhanced activity and synergistic effect.","date":"2022","source":"European journal of medicinal chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/35452935","citation_count":3,"is_preprint":false},{"pmid":"39434426","id":"PMC_39434426","title":"The deficiency of ALKBH5 contributes to hepatic lipid deposition by impairing VPS11-dependent autophagic flux.","date":"2024","source":"The FEBS 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disorders","url":"https://pubmed.ncbi.nlm.nih.gov/41551069","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2024.10.07.617026","title":"Characterization of the<i>Plasmodium falciparum</i>homologue of Vps16, a member of the Vps-C tethering complex","date":"2024-10-07","source":"bioRxiv","url":"https://doi.org/10.1101/2024.10.07.617026","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.03.14.643259","title":"Genetic basis of the evolution of vertical bars in clownfishes","date":"2025-03-17","source":"bioRxiv","url":"https://doi.org/10.1101/2025.03.14.643259","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":19121,"output_tokens":3316,"usd":0.053552},"stage2":{"model":"claude-opus-4-6","input_tokens":6734,"output_tokens":3220,"usd":0.171255},"total_usd":0.224807,"stage1_batch_id":"msgbatch_01BparvgRZ9S2LMidvaoo86K","stage2_batch_id":"msgbatch_01NkBfv9SVZWthhS7j6mU6G3","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1990,\n      \"finding\": \"Yeast PEP5/VPS11 gene product is a peripheral vacuolar membrane protein of ~107 kDa required for vacuolar hydrolase maturation; loss-of-function causes accumulation of inactive precursors to vacuolar hydrolases and vestigial vacuole morphology.\",\n      \"method\": \"Gene deletion/disruption, complementation, cell fractionation, immunoblot with anti-PEP5 antibodies\",\n      \"journal\": \"Genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with defined cellular phenotype, fractionation demonstrating peripheral vacuolar membrane localization, replicated in multiple follow-up studies\",\n      \"pmids\": [\"2204580\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Genetic epistasis in yeast shows that VPS11/PEP5 functions both at the Golgi-to-prevacuolar compartment step (where Vps8p acts) and more proximally at the vacuole; the vps8-200 allele partially suppresses the pep5 vestigial vacuole phenotype, restoring mature vacuolar hydrolases, indicating VPS11 is bifunctional across multiple transport pathways to the vacuole.\",\n      \"method\": \"Genetic epistasis/suppressor analysis; double-mutant phenotypic characterization of vacuolar morphology and hydrolase activity\",\n      \"journal\": \"Genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — epistasis with defined phenotypic readouts, single study\",\n      \"pmids\": [\"9475722\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"The human VPS11 C846G missense mutation in the RING-H2 domain causes aberrant ubiquitination and accelerated turnover of VPS11 protein, compromised VPS11-VPS18 complex assembly, impaired autophagic activity in human cells, and reduced CNS myelination in zebrafish with truncated RING-H2 domain.\",\n      \"method\": \"Exome sequencing for variant identification; immunoblot for protein stability; co-immunoprecipitation for VPS11-VPS18 complex assembly; autophagy flux assay in human cells; zebrafish vps11 mutant CNS myelination analysis\",\n      \"journal\": \"PLoS genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (co-IP, functional assay, in vivo model) in a single study with rigorous controls\",\n      \"pmids\": [\"27120463\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"The yeast homolog of the human VPS11 C846G mutation (p.Cys846Gly) shows moderate impairment of fusion of the late endosome to the vacuole, as demonstrated by the Mup1-GFP transport assay in mutant yeast.\",\n      \"method\": \"Mup1-GFP transport assay in Saccharomyces cerevisiae homologous mutant\",\n      \"journal\": \"Journal of medical genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — functional transport assay in yeast ortholog, single study\",\n      \"pmids\": [\"26307567\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Vps11 (and Vps18), as common subunits of the HOPS/CORVET complexes, possess intrinsic E3 ubiquitin ligase activity; overexpression perturbs ubiquitination in signal transduction pathways including Wnt, ERα, and NFκB; specifically, Vps11/18-mediated ubiquitination of the scaffold protein PELP1 impairs ERα activation by c-Src.\",\n      \"method\": \"Overexpression experiments, ubiquitination assays, signaling pathway readouts (Wnt, ERα, NFκB reporters), co-immunoprecipitation of PELP1 ubiquitination\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — enzymatic E3 ligase activity demonstrated with multiple substrates and pathways, mechanistic link to PELP1/ERα/c-Src established\",\n      \"pmids\": [\"31015428\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Toxoplasma gondii Vps11 (ortholog of human VPS11) is a component of HOPS and CORVET tethering complexes; it associates dynamically with Golgi endosomal-related compartments, the vacuole, and immature apical secretory organelles; conditional knockdown disrupts biogenesis of dense granules, rhoptries, and micronemes, impairing parasite motility, invasion, egress, and intracellular growth.\",\n      \"method\": \"Conditional knockdown (regulatable expression), immunofluorescence/co-localization, phenotypic analysis of organelle biogenesis and parasite function\",\n      \"journal\": \"Cellular microbiology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — conditional KD with multiple defined organelle and functional phenotypes, orthogonal localization data\",\n      \"pmids\": [\"25640905\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Loss of zebrafish Vps11 (platinum mutant) results in absence of mature melanosomes and gradual loss of RPE integrity; Vps11 is essential for melanosome maturation but not for initiation of melanin biosynthesis or normal retinal development, establishing its role in late-stage vesicular trafficking in pigment cells.\",\n      \"method\": \"Bulked segregant analysis, candidate gene sequencing, phenocopy by morpholino, rescue experiments, histology, immunohistochemistry, transmission electron microscopy\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic identification confirmed by phenocopy and rescue, multiple imaging modalities, defined cellular phenotype\",\n      \"pmids\": [\"21330665\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"In zebrafish vps11(w66) mutants, loss of Vps11 leads to caspase-independent, cathepsin-dependent chromatophore death; increased autophagosome marker LC3B-II accumulation and premature chromatophore death are rescued by cathepsin/calpain inhibitor ALLM or bafilomycin A1 (V-ATPase inhibitor), indicating Vps11 promotes melanophore survival by suppressing aberrant cathepsin release/activity.\",\n      \"method\": \"TUNEL analysis, caspase inhibitor treatment, western blot for PARP-1 cleavage and LC3B, pharmacological rescue with ALLM and bafilomycin A1\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal pharmacological and biochemical methods, single study\",\n      \"pmids\": [\"23724125\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Knockdown of Vps11 (core subunit of HOPS and CORVET) in human cells increases retrograde transport of Shiga toxin and ricin to the Golgi, increases their toxicity, and restores reduced Gb3 glycolipid levels caused by moesin depletion, placing Vps11 as a negative regulator of retrograde toxin transport and glycolipid degradation.\",\n      \"method\": \"siRNA knockdown, retrograde transport assays for Shiga toxin and ricin, cytotoxicity assays, Gb3 level measurement\",\n      \"journal\": \"Communicative & integrative biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — functional KD with defined transport phenotypes, multiple readouts, single study\",\n      \"pmids\": [\"24778763\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"VPS11 protein is strongly expressed in mouse oligodendrocytes and localizes with Myelin Associated Glycoprotein (MAG) in the inner tongue of myelin; co-localization with PDGFRα in round vesicles of OPCs/oligodendrocytes in vitro and in vivo suggests VPS11 participates in retrograde endolysosomal transport from the myelin inner tongue to the oligodendrocyte perikaryon.\",\n      \"method\": \"Immunocytochemistry, immunofluorescent co-localization (Vps11/MAG, Vps11/MBP, Vps11/neurofilament, Vps11/PDGFRα) in mouse tissue and cultured cells\",\n      \"journal\": \"ASN neuro\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — direct localization with functional context, single study, no KO/KD functional validation\",\n      \"pmids\": [\"33874780\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"A novel homozygous VPS11 variant associated with adult-onset generalized dystonia causes marked lysosomal and autophagic abnormalities in patient fibroblasts; these abnormalities are rescued by overexpression of wild-type VPS11 protein, confirming a loss-of-function mechanism.\",\n      \"method\": \"Functional studies in patient fibroblasts: lysosomal and autophagic assays; rescue by wild-type VPS11 overexpression\",\n      \"journal\": \"Annals of neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — loss-of-function with defined cellular phenotype plus rescue, single study\",\n      \"pmids\": [\"33452836\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ALKBH5, an m6A demethylase, removes m6A modification from VPS11 mRNA to promote its translation; loss of ALKBH5 reduces VPS11 protein levels, impairing autophagic flux (autophagosome-lysosome fusion) and promoting hepatic lipid accumulation; VPS11 overexpression reverses lipid accumulation in ALKBH5-silenced hepatocytes.\",\n      \"method\": \"RNA-sequencing, methylated RNA immunoprecipitation-qPCR (MeRIP-qPCR), stable overexpression/knockdown, autophagy flux assays (LC3B, p62), rescue by VPS11 overexpression\",\n      \"journal\": \"The FEBS journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — m6A modification of VPS11 mRNA confirmed by MeRIP-qPCR, functional rescue, multiple orthogonal methods, single study\",\n      \"pmids\": [\"39434426\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"miR-542-3p targets the 3' UTR of human VPS11 mRNA (seed sequence absent in mouse/rat), reducing VPS11 expression in human macrophages upon M. tuberculosis infection; VPS11 overexpression antagonizes miR-542-3p-mediated promotion of mycobacterial survival by restoring autophagy.\",\n      \"method\": \"Luciferase reporter assay, RNA pulldown, RNA immunoprecipitation, VPS11 overexpression in human macrophages, autophagy assays\",\n      \"journal\": \"Microbial pathogenesis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct miR-542-3p/VPS11 interaction validated by multiple binding assays, functional rescue, single study\",\n      \"pmids\": [\"35662671\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"VPS11 is a core subunit of the HOPS and CORVET endolysosomal tethering complexes that functions as a peripheral vacuolar/endosomal membrane protein required for vesicle docking and fusion across multiple trafficking pathways (Golgi→prevacuole, late endosome→lysosome, autophagosome→lysosome); it possesses intrinsic E3 ubiquitin ligase activity through its RING-H2 domain (enabling fine-tuning of Wnt, ERα, and NFκB signaling via substrate ubiquitination), is essential for melanosome maturation, myelin maintenance, and autophagic flux, and its expression is post-transcriptionally regulated by m6A modification of its mRNA and by miR-542-3p.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"VPS11 is a core subunit of the HOPS and CORVET endolysosomal tethering complexes, functioning as a peripheral vacuolar/endosomal membrane protein essential for vesicle docking and fusion across multiple trafficking pathways including Golgi-to-prevacuolar transport, late endosome-to-lysosome fusion, autophagosome-lysosome fusion, and melanosome maturation [PMID:2204580, PMID:9475722, PMID:21330665, PMID:27120463]. Beyond its tethering role, VPS11 possesses intrinsic E3 ubiquitin ligase activity through its C-terminal RING-H2 domain, enabling ubiquitination of substrates such as PELP1 to modulate Wnt, ERα, and NF-κB signaling [PMID:31015428]. Disease-causing mutations in the VPS11 RING-H2 domain destabilize the protein, impair VPS11–VPS18 complex assembly, compromise autophagic flux, and reduce CNS myelination, linking VPS11 loss-of-function to leukoencephalopathy and adult-onset generalized dystonia [PMID:27120463, PMID:33452836]. VPS11 expression is post-transcriptionally regulated by m6A modification of its mRNA (removed by ALKBH5) and by miR-542-3p, which suppresses VPS11 in human macrophages during mycobacterial infection to subvert autophagic clearance [PMID:39434426, PMID:35662671].\",\n  \"teleology\": [\n    {\n      \"year\": 1990,\n      \"claim\": \"Establishing VPS11 as a peripheral vacuolar membrane protein required for vacuolar hydrolase maturation answered the fundamental question of where and why VPS11 acts in the endomembrane system.\",\n      \"evidence\": \"Gene disruption, complementation, cell fractionation, and immunoblotting in S. cerevisiae\",\n      \"pmids\": [\"2204580\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"No interacting partners or complexes identified\",\n        \"Mechanism of membrane association unknown\",\n        \"Role limited to vacuolar hydrolase sorting; broader trafficking functions not explored\"\n      ]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Epistasis analysis revealed that VPS11 is bifunctional, acting at both the Golgi-to-prevacuolar and vacuolar fusion steps, broadening VPS11 from a single-pathway component to a multi-step trafficking factor.\",\n      \"evidence\": \"Genetic suppressor analysis of vps8-200/pep5 double mutants in yeast with vacuolar morphology and hydrolase activity readouts\",\n      \"pmids\": [\"9475722\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Whether VPS11 acts in distinct complexes at each step was unknown\",\n        \"Direct biochemical interaction with Vps8 not tested\"\n      ]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Identification of VPS11 as essential for melanosome maturation in zebrafish extended its trafficking role to specialized lysosome-related organelles in vertebrates, separating its function from melanin biosynthesis initiation.\",\n      \"evidence\": \"Bulked segregant analysis, morpholino phenocopy, genetic rescue, TEM in zebrafish platinum mutant\",\n      \"pmids\": [\"21330665\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Step at which melanosome biogenesis is blocked not molecularly defined\",\n        \"HOPS/CORVET complex involvement in melanosomes not directly tested\"\n      ]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Demonstrating that Vps11 loss leads to caspase-independent, cathepsin-dependent cell death with autophagosome accumulation established that VPS11 is required for autophagic flux and lysosomal integrity in vivo.\",\n      \"evidence\": \"Pharmacological rescue (ALLM, bafilomycin A1), LC3B-II western blot, TUNEL analysis in zebrafish vps11(w66) mutant chromatophores\",\n      \"pmids\": [\"23724125\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Whether autophagosome accumulation reflects fusion block vs. degradation block not distinguished\",\n        \"Mechanism of cathepsin release not defined\"\n      ]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Functional characterization of the VPS11 C846G RING-H2 domain mutation in yeast and human cells established that this domain is critical for protein stability, VPS11–VPS18 complex integrity, autophagic activity, and CNS myelination, linking VPS11 to a leukoencephalopathy.\",\n      \"evidence\": \"Yeast Mup1-GFP transport assay; co-IP for VPS11–VPS18 assembly; autophagy flux assays in human cells; zebrafish myelination analysis; patient exome sequencing\",\n      \"pmids\": [\"26307567\", \"27120463\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether RING-H2 E3 ligase activity per se is required for tethering complex function vs. structural integrity not separated\",\n        \"Full patient phenotype-genotype correlation limited to single family\"\n      ]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Conditional knockdown of Vps11 in Toxoplasma gondii demonstrated that HOPS/CORVET-mediated vesicular trafficking is essential for biogenesis of multiple secretory organelles and parasite virulence, generalizing VPS11 function across eukaryotes.\",\n      \"evidence\": \"Conditional knockdown, immunofluorescence co-localization, phenotypic assays for organelle biogenesis, invasion, and growth in T. gondii\",\n      \"pmids\": [\"25640905\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Specific HOPS vs. CORVET contribution not separated\",\n        \"Direct physical association of TgVps11 with tethering complex subunits not biochemically demonstrated\"\n      ]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Discovery that VPS11 possesses intrinsic E3 ubiquitin ligase activity via its RING-H2 domain, with the ability to ubiquitinate PELP1 and modulate Wnt, ERα, and NF-κB signaling, revealed a signaling regulatory function independent of its canonical tethering role.\",\n      \"evidence\": \"In vitro ubiquitination assays, overexpression studies, signaling pathway reporters, co-IP of PELP1 ubiquitination\",\n      \"pmids\": [\"31015428\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Endogenous-level E3 ligase activity not confirmed; findings rely on overexpression\",\n        \"Substrate specificity and physiological relevance under endogenous conditions not established\",\n        \"Whether E3 activity is separable from tethering function in vivo not tested\"\n      ]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Localization of VPS11 to the myelin inner tongue with MAG and to PDGFRα-positive vesicles in oligodendrocytes suggested VPS11 participates in retrograde endolysosomal transport from the myelin sheath to the cell body, providing anatomical context for VPS11-associated leukoencephalopathy.\",\n      \"evidence\": \"Immunocytochemistry and immunofluorescence co-localization in mouse brain tissue and cultured oligodendrocytes\",\n      \"pmids\": [\"33874780\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"No functional KO/KD in oligodendrocytes to validate trafficking role\",\n        \"Co-localization alone does not establish direct functional interaction with MAG or PDGFRα\"\n      ]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Demonstration that a novel VPS11 variant causes adult-onset generalized dystonia with lysosomal and autophagic abnormalities rescuable by wild-type VPS11 expanded the disease spectrum beyond leukoencephalopathy.\",\n      \"evidence\": \"Functional studies in patient fibroblasts with lysosomal/autophagic assays and rescue by wild-type VPS11 overexpression\",\n      \"pmids\": [\"33452836\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Single family study; independent confirmation pending\",\n        \"Specific step in autophagosome–lysosome fusion that is disrupted not defined\"\n      ]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Identification of miR-542-3p as a direct negative regulator of VPS11 mRNA in human macrophages during M. tuberculosis infection revealed a pathogen immune-evasion strategy that exploits VPS11-dependent autophagy.\",\n      \"evidence\": \"Luciferase reporter assay, RNA pulldown, RNA immunoprecipitation, VPS11 overexpression rescue in human macrophages\",\n      \"pmids\": [\"35662671\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Species-specific (human) miRNA targeting—mouse/rat validation not possible\",\n        \"Whether other HOPS/CORVET subunits are co-regulated by miR-542-3p not tested\"\n      ]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Showing that m6A modification of VPS11 mRNA, regulated by ALKBH5 demethylase, controls VPS11 translation and thereby autophagic flux and hepatic lipid homeostasis uncovered an epitranscriptomic layer of VPS11 regulation.\",\n      \"evidence\": \"MeRIP-qPCR, ALKBH5 knockdown/overexpression, autophagy flux assays, rescue by VPS11 overexpression in hepatocytes\",\n      \"pmids\": [\"39434426\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Specific m6A site(s) on VPS11 mRNA not mapped\",\n        \"In vivo hepatic phenotype of VPS11 loss not directly tested\",\n        \"Reader protein mediating m6A-dependent translational regulation of VPS11 not identified\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key unresolved questions include whether VPS11's E3 ligase activity is physiologically relevant at endogenous expression levels, how the RING-H2 domain's enzymatic and structural roles are balanced within the HOPS/CORVET complex, and what the complete genotype–phenotype spectrum is for VPS11 loss-of-function in the human nervous system.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Endogenous-level E3 ligase substrates not identified by unbiased proteomics\",\n        \"Structural basis for VPS11 within HOPS/CORVET not resolved at atomic level in human\",\n        \"Full phenotypic spectrum of human VPS11 mutations across tissues not systematically catalogued\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0016874\", \"supporting_discovery_ids\": [4]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [4]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [0, 1, 5, 8]},\n      {\"term_id\": \"GO:0005764\", \"supporting_discovery_ids\": [0, 6, 7, 10]},\n      {\"term_id\": \"GO:0005794\", \"supporting_discovery_ids\": [1, 5]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [0, 1, 3, 5, 6, 8]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [2, 7, 10, 11, 12]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [4]},\n      {\"term_id\": \"R-HSA-1852241\", \"supporting_discovery_ids\": [5, 6]}\n    ],\n    \"complexes\": [\n      \"HOPS complex\",\n      \"CORVET complex\"\n    ],\n    \"partners\": [\n      \"VPS18\",\n      \"PELP1\",\n      \"ALKBH5\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}