{"gene":"BBS10","run_date":"2026-04-28T17:12:38","timeline":{"discoveries":[{"year":2006,"finding":"BBS10 encodes a vertebrate-specific chaperonin-like protein; morpholino-based suppression of bbs10 in zebrafish exacerbated the phenotypes of other bbs morphants, placing BBS10 in a common pathway with other BBS genes consistent with oligogenic inheritance.","method":"Positional cloning, sequence analysis, zebrafish morpholino knockdown with epistasis testing","journal":"Nature genetics","confidence":"High","confidence_rationale":"Tier 2 — zebrafish genetic epistasis across multiple BBS genes, replicated in large multi-ethnic cohort; foundational paper with 223 citations","pmids":["16582908"],"is_preprint":false},{"year":2015,"finding":"BBS10 protein forms part of a chaperone complex localized at the basal body of the primary cilium; complete Bbs10 knockout mice develop obesity, retinal degeneration, glomerular structural defects, and polyuria with elevated arginine vasopressin, whereas renal-epithelial-specific knockout (Cdh16-Cre) produces no detectable impairment, demonstrating that systemic rather than cell-autonomous renal BBS10 loss drives renal dysfunction.","method":"Conditional and complete knockout mouse models, immunofluorescence localization, physiological phenotyping (body weight, ERG, renal histology, urine output, serum AVP)","journal":"Cilia","confidence":"High","confidence_rationale":"Tier 2 — clean KO/conditional KO with multiple defined phenotypic readouts; systemic vs. tissue-specific comparison provides mechanistic insight","pmids":["26273430"],"is_preprint":false},{"year":2018,"finding":"BBS10 (together with BBS6 and BBS12) encodes chaperonin-like proteins important for the assembly of the multiprotein BBSome complex encoded by other BBS genes; loss-of-function in BBS10 disrupts BBSome assembly.","method":"iPSC generation from BBS10 patient (c.271insT), literature-based mechanistic summary of chaperonin role in BBSome assembly","journal":"Stem cell research","confidence":"Medium","confidence_rationale":"Tier 3 — mechanistic claim supported by prior literature, iPSC resource paper; single method, moderate evidence","pmids":["30312873"],"is_preprint":false},{"year":2022,"finding":"Mass spectrometry-based interactome analysis of BBS10 in IMCD3 cells identified putative BBS10 interactors involved in renal metabolism, RNA processing, and cell proliferation; Bbs10-invalidated IMCD3 cells showed increased proliferation, increased ATP production, and up-regulation of aerobic glycolysis, revealing extraciliary metabolic functions of BBS10.","method":"Stable Bbs10 knockout in IMCD3 cells, mass spectrometry-based proteomics/interactome, metabolic assays (ATP measurement, glycolysis), urine metabolomics in BBS patients","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2/3 — MS interactome plus cellular metabolic phenotype in KO cells; single lab, multiple orthogonal methods","pmids":["36012682"],"is_preprint":false},{"year":2025,"finding":"Truncating C-terminal mutations in BBS10 reduce protein stability via accelerated degradation through the ubiquitin-proteasome pathway, impair protein-protein interactions with BBS12 and the core BBSome subunit BBS7, and lead to shortened ciliary length in hTERT-RPE1 cells, while mutant protein still localizes to primary cilia.","method":"Transfection of mutant BBS10 constructs in HEK293T and hTERT-RPE1 cells, Western blot (protein stability), co-immunoprecipitation (interaction with BBS7 and BBS12), immunofluorescence (ciliogenesis and ciliary length measurement), proteasome inhibitor experiments","journal":"Experimental eye research","confidence":"Medium","confidence_rationale":"Tier 2 — reciprocal co-IP, Western blot stability assay, and ciliogenesis readout in two cell lines; single lab but multiple orthogonal methods","pmids":["40914337"],"is_preprint":false},{"year":2014,"finding":"A rare missense variant in BBS10 (c.1189A>G, p.Ile397Val) confers risk of type 2 diabetes in a recessive state; zebrafish in vivo modeling confirmed the variant is pathogenic, implicating BBS10 function in metabolic regulation beyond canonical ciliopathy phenotypes.","method":"RAFT statistical genetics method, zebrafish in vivo pathogenicity testing of BBS10 variant","journal":"American journal of human genetics","confidence":"Medium","confidence_rationale":"Tier 2 — in vivo zebrafish functional validation of specific variant; single study","pmids":["25439097"],"is_preprint":false}],"current_model":"BBS10 is a vertebrate-specific chaperonin-like protein that localizes to the basal body of the primary cilium, where it forms a chaperone complex with BBS6 and BBS12 to facilitate assembly of the BBSome; truncating mutations destabilize BBS10 via the ubiquitin-proteasome pathway, disrupt its interactions with BBS7 and BBS12, and impair ciliary length, while systemic loss of BBS10 drives obesity, retinal degeneration, and renal dysfunction through mechanisms that extend beyond renal epithelial cell-autonomous ciliary defects to include altered cellular metabolism including up-regulation of aerobic glycolysis."},"narrative":{"teleology":[{"year":2006,"claim":"Positional cloning identified BBS10 as a vertebrate-specific chaperonin-like gene whose disruption participates in a common genetic pathway with other BBS loci, establishing the molecular identity and epistatic context of BBS10.","evidence":"Positional cloning with sequence analysis and zebrafish morpholino epistasis testing across multiple BBS genes in a large multi-ethnic cohort","pmids":["16582908"],"confidence":"High","gaps":["Direct biochemical demonstration of chaperonin activity was not provided","The specific protein partners and cargo of BBS10 were not identified","Whether BBS10 functions outside the cilium was unknown"]},{"year":2014,"claim":"A recessive BBS10 missense variant was shown to confer type 2 diabetes risk independently of classical ciliopathy, broadening BBS10's functional scope to metabolic regulation.","evidence":"RAFT statistical genetics method followed by zebrafish in vivo pathogenicity assay of the p.Ile397Val variant","pmids":["25439097"],"confidence":"Medium","gaps":["The cellular mechanism by which this variant alters glucose homeostasis was not determined","Replication in independent human cohorts was not shown","Whether the effect is cilium-dependent or cilium-independent was not resolved"]},{"year":2015,"claim":"Complete versus tissue-specific knockout in mice established that BBS10 loss drives obesity, retinal degeneration, and renal dysfunction through systemic rather than renal-epithelial-cell-autonomous mechanisms, resolving whether kidney pathology is intrinsic to ciliary defects in renal tubules.","evidence":"Whole-body and Cdh16-Cre conditional Bbs10 knockout mice with ERG, renal histology, body weight, urine output, and serum AVP measurements","pmids":["26273430"],"confidence":"High","gaps":["The non-renal tissues or systemic signals responsible for the renal phenotype were not identified","Neuronal or hypothalamic contributions to the obesity phenotype were not dissected","Whether BBS10 has functions beyond BBSome assembly in vivo was not tested"]},{"year":2018,"claim":"Patient-derived iPSCs confirmed that BBS10, together with BBS6 and BBS12, forms a chaperonin subcomplex required for BBSome assembly, providing a human cellular system consistent with the chaperone model.","evidence":"iPSC derivation from a BBS10 patient carrying the c.271insT mutation, with reference to prior biochemical evidence of BBS6/10/12 chaperonin complex","pmids":["30312873"],"confidence":"Medium","gaps":["Direct reconstitution of BBSome assembly dependent on the BBS6/10/12 complex was not performed in this study","Functional phenotyping of the iPSC-derived cells was not reported"]},{"year":2022,"claim":"Proteomic and metabolic profiling of Bbs10-knockout renal cells revealed extraciliary functions including altered proliferation, increased ATP production, and upregulated aerobic glycolysis, answering whether BBS10 has roles beyond ciliary structure.","evidence":"Mass spectrometry interactomics and metabolic assays (ATP, glycolysis) in Bbs10-knockout IMCD3 cells, with urine metabolomics in BBS patients","pmids":["36012682"],"confidence":"Medium","gaps":["The interactors identified by MS have not been validated by reciprocal co-IP or functional assays","Whether the metabolic shift is a direct consequence of BBS10 loss or secondary to disrupted BBSome trafficking is unresolved","In vivo relevance of the glycolytic shift to BBS pathophysiology was not demonstrated"]},{"year":2025,"claim":"Biochemical dissection of disease-causing truncating mutations showed that C-terminal integrity is required for BBS10 protein stability (via protection from ubiquitin–proteasome degradation) and for interaction with BBS12 and BBS7, linking genotype to ciliogenesis defects.","evidence":"Overexpression of mutant BBS10 constructs in HEK293T and hTERT-RPE1 cells with co-immunoprecipitation, Western blot stability assays, proteasome inhibitor rescue, and ciliary length measurements","pmids":["40914337"],"confidence":"Medium","gaps":["Experiments relied on overexpressed tagged constructs rather than endogenous protein","Whether reduced interaction with BBS7 is the proximate cause of shortened cilia was not tested directly","Structural basis for how the C-terminal domain stabilizes BBS10 and mediates partner binding is unknown"]},{"year":null,"claim":"The precise mechanism by which BBS10 chaperone activity promotes BBSome assembly, the structural basis of the BBS6/10/12 complex, and the molecular pathways linking BBS10 loss to metabolic reprogramming and systemic (non-cell-autonomous) organ pathology remain unresolved.","evidence":"","pmids":[],"confidence":"High","gaps":["No reconstituted in vitro BBSome assembly assay with purified BBS6/10/12 complex exists","No high-resolution structure of BBS10 or the BBS6/10/12 chaperonin complex is available","The systemic signals or cell types responsible for non-cell-autonomous renal and metabolic pathology have not been identified"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0044183","term_label":"protein folding chaperone","supporting_discovery_ids":[0,2,4]}],"localization":[{"term_id":"GO:0005815","term_label":"microtubule organizing center","supporting_discovery_ids":[1,4]},{"term_id":"GO:0005929","term_label":"cilium","supporting_discovery_ids":[1,4]}],"pathway":[{"term_id":"R-HSA-1852241","term_label":"Organelle biogenesis and maintenance","supporting_discovery_ids":[0,1,2,4]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[3,5]}],"complexes":["BBS6/BBS10/BBS12 chaperonin complex","BBSome"],"partners":["BBS6","BBS12","BBS7"],"other_free_text":[]},"mechanistic_narrative":"BBS10 is a vertebrate-specific chaperonin-like protein that functions at the basal body of the primary cilium to promote assembly of the BBSome, a multiprotein complex essential for ciliary trafficking. Together with BBS6 and BBS12, BBS10 forms a chaperone subcomplex that facilitates BBSome assembly; truncating mutations destabilize BBS10 via the ubiquitin–proteasome pathway, disrupt its interactions with BBS7 and BBS12, and shorten ciliary length [PMID:16582908, PMID:30312873, PMID:40914337]. Loss of BBS10 in mice causes obesity, retinal degeneration, and renal dysfunction driven by systemic rather than renal-epithelial-cell-autonomous mechanisms, and BBS10-null renal cells exhibit increased proliferation and a metabolic shift toward aerobic glycolysis, indicating extraciliary roles in cellular metabolism [PMID:26273430, PMID:36012682]. Biallelic mutations in BBS10 cause Bardet-Biedl syndrome, and a rare recessive missense variant independently confers risk for type 2 diabetes [PMID:16582908, PMID:25439097]."},"prefetch_data":{"uniprot":{"accession":"Q8TAM1","full_name":"BBSome complex assembly protein BBS10","aliases":["Bardet-Biedl syndrome 10 protein"],"length_aa":723,"mass_kda":80.8,"function":"Probable molecular chaperone that assists the folding of proteins upon ATP hydrolysis (PubMed:20080638). Plays a role in the assembly of BBSome, a complex involved in ciliogenesis regulating transports vesicles to the cilia (PubMed:20080638). Involved in adipogenic differentiation (PubMed:19190184)","subcellular_location":"Cell projection, cilium","url":"https://www.uniprot.org/uniprotkb/Q8TAM1/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/BBS10","classification":"Not Classified","n_dependent_lines":5,"n_total_lines":1208,"dependency_fraction":0.0041390728476821195},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/BBS10","total_profiled":1310},"omim":[{"mim_id":"617406","title":"BARDET-BIEDL SYNDROME 21; BBS21","url":"https://www.omim.org/entry/617406"},{"mim_id":"615994","title":"BARDET-BIEDL SYNDROME 17; BBS17","url":"https://www.omim.org/entry/615994"},{"mim_id":"615990","title":"BARDET-BIEDL SYNDROME 13; BBS13","url":"https://www.omim.org/entry/615990"},{"mim_id":"615989","title":"BARDET-BIEDL SYNDROME 12; BBS12","url":"https://www.omim.org/entry/615989"},{"mim_id":"615987","title":"BARDET-BIEDL SYNDROME 10; BBS10","url":"https://www.omim.org/entry/615987"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"","locations":[],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in many","driving_tissues":[],"url":"https://www.proteinatlas.org/search/BBS10"},"hgnc":{"alias_symbol":["FLJ23560"],"prev_symbol":["C12orf58"]},"alphafold":{"accession":"Q8TAM1","domains":[{"cath_id":"3.50.7.10","chopping":"240-268_278-394","consensus_level":"medium","plddt":86.9663,"start":240,"end":394}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8TAM1","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q8TAM1-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q8TAM1-F1-predicted_aligned_error_v6.png","plddt_mean":71.31},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=BBS10","jax_strain_url":"https://www.jax.org/strain/search?query=BBS10"},"sequence":{"accession":"Q8TAM1","fasta_url":"https://rest.uniprot.org/uniprotkb/Q8TAM1.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q8TAM1/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8TAM1"}},"corpus_meta":[{"pmid":"16582908","id":"PMC_16582908","title":"BBS10 encodes a vertebrate-specific chaperonin-like protein and is a major BBS locus.","date":"2006","source":"Nature genetics","url":"https://pubmed.ncbi.nlm.nih.gov/16582908","citation_count":223,"is_preprint":false},{"pmid":"16823392","id":"PMC_16823392","title":"Pitfalls of homozygosity mapping: an extended consanguineous Bardet-Biedl syndrome family with two mutant genes (BBS2, BBS10), three mutations, but no triallelism.","date":"2006","source":"European journal of human genetics : EJHG","url":"https://pubmed.ncbi.nlm.nih.gov/16823392","citation_count":41,"is_preprint":false},{"pmid":"26518167","id":"PMC_26518167","title":"Targeted multi-gene panel testing for the diagnosis of Bardet Biedl syndrome: Identification of nine novel mutations across BBS1, BBS2, BBS4, BBS7, BBS9, BBS10 genes.","date":"2015","source":"European journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/26518167","citation_count":39,"is_preprint":false},{"pmid":"26273430","id":"PMC_26273430","title":"Comparing the Bbs10 complete knockout phenotype with a specific renal epithelial knockout one highlights the link between renal defects and systemic inactivation in mice.","date":"2015","source":"Cilia","url":"https://pubmed.ncbi.nlm.nih.gov/26273430","citation_count":28,"is_preprint":false},{"pmid":"25439097","id":"PMC_25439097","title":"A novel test for recessive contributions to complex diseases implicates Bardet-Biedl syndrome gene BBS10 in idiopathic type 2 diabetes and obesity.","date":"2014","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/25439097","citation_count":27,"is_preprint":false},{"pmid":"17106446","id":"PMC_17106446","title":"Autozygosity mapping of Bardet-Biedl syndrome to 12q21.2 and confirmation of FLJ23560 as BBS10.","date":"2006","source":"European journal of human genetics : EJHG","url":"https://pubmed.ncbi.nlm.nih.gov/17106446","citation_count":22,"is_preprint":false},{"pmid":"23219996","id":"PMC_23219996","title":"Novel homozygous mutations in the genes ARL6 and BBS10 underlying Bardet-Biedl syndrome.","date":"2012","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/23219996","citation_count":20,"is_preprint":false},{"pmid":"20805367","id":"PMC_20805367","title":"BBS10 mutations are common in 'Meckel'-type cystic kidneys.","date":"2010","source":"Journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/20805367","citation_count":20,"is_preprint":false},{"pmid":"36012682","id":"PMC_36012682","title":"Multi-Omics Studies Unveil Extraciliary Functions of BBS10 and Show Metabolic Aberrations Underlying Renal Disease in Bardet-Biedl Syndrome.","date":"2022","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/36012682","citation_count":12,"is_preprint":false},{"pmid":"29666954","id":"PMC_29666954","title":"Clinical characteristics of a Japanese patient with Bardet-Biedl syndrome caused by BBS10 mutations.","date":"2018","source":"Japanese journal of ophthalmology","url":"https://pubmed.ncbi.nlm.nih.gov/29666954","citation_count":11,"is_preprint":false},{"pmid":"36312387","id":"PMC_36312387","title":"Computational and Structural Analysis to Assess the Pathogenicity of Bardet-Biedl Syndrome Related Missense Variants Identified in Bardet-Biedl Syndrome 10 Gene (BBS10).","date":"2022","source":"ACS omega","url":"https://pubmed.ncbi.nlm.nih.gov/36312387","citation_count":8,"is_preprint":false},{"pmid":"34900151","id":"PMC_34900151","title":"Identification of a Novel Homozygous Mutation in BBS10 Gene in an Iranian Family with Bardet-Biedl Syndrome.","date":"2021","source":"Avicenna journal of medical biotechnology","url":"https://pubmed.ncbi.nlm.nih.gov/34900151","citation_count":5,"is_preprint":false},{"pmid":"28808579","id":"PMC_28808579","title":"A novel BBS10 mutation identified in a patient with Bardet-Biedl syndrome with a violent emotional outbreak.","date":"2017","source":"Human genome variation","url":"https://pubmed.ncbi.nlm.nih.gov/28808579","citation_count":4,"is_preprint":false},{"pmid":"36340607","id":"PMC_36340607","title":"Prenatal diagnosis of Bardet‑Biedl syndrome due to novel variants in the BBS10 gene in a fetus with multiple anomalies: A case report.","date":"2022","source":"Experimental and therapeutic medicine","url":"https://pubmed.ncbi.nlm.nih.gov/36340607","citation_count":3,"is_preprint":false},{"pmid":"30312873","id":"PMC_30312873","title":"Generation of induced pluripotent stem cells, KCi002-A derived from a patient with Bardet-Biedl syndrome homozygous for the BBS10 variant c.271insT.","date":"2018","source":"Stem cell research","url":"https://pubmed.ncbi.nlm.nih.gov/30312873","citation_count":1,"is_preprint":false},{"pmid":"40914337","id":"PMC_40914337","title":"Truncating mutations in BBS10 and BBS12 impair proteostasis and ciliary architecture in Bardet-Biedl Syndrome.","date":"2025","source":"Experimental eye research","url":"https://pubmed.ncbi.nlm.nih.gov/40914337","citation_count":0,"is_preprint":false},{"pmid":"39315571","id":"PMC_39315571","title":"Integration of multi-omics reveals the important role of the BBS10 gene in reproduction.","date":"2024","source":"Journal of animal science","url":"https://pubmed.ncbi.nlm.nih.gov/39315571","citation_count":0,"is_preprint":false},{"pmid":"30335236","id":"PMC_30335236","title":"A pathogenic homozygous variant of the BBS10 gene in a patient with Bardet Biedl syndrome.","date":"2018","source":"Biomedica : revista del Instituto Nacional de Salud","url":"https://pubmed.ncbi.nlm.nih.gov/30335236","citation_count":0,"is_preprint":false},{"pmid":"41418239","id":"PMC_41418239","title":"Assessment of genetic variation(s) in BBS10, BBS6, and BBS12 in a family from Sindh, Pakistan diagnosed with Bardet-Biedl Syndrome.","date":"2025","source":"JPMA. The Journal of the Pakistan Medical Association","url":"https://pubmed.ncbi.nlm.nih.gov/41418239","citation_count":0,"is_preprint":false},{"pmid":"39250911","id":"PMC_39250911","title":"Neonatal Hydrocolpos in Bardet-Biedl Syndrome due to a Novel Frameshift Indel in the BBS10 Gene.","date":"2024","source":"Sexual development : genetics, molecular biology, evolution, endocrinology, embryology, and pathology of sex determination and differentiation","url":"https://pubmed.ncbi.nlm.nih.gov/39250911","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":10750,"output_tokens":1576,"usd":0.027945},"stage2":{"model":"claude-opus-4-6","input_tokens":4810,"output_tokens":2098,"usd":0.11475},"total_usd":0.142695,"stage1_batch_id":"msgbatch_01TqNM6p6FsoMBT2jzQTwKBr","stage2_batch_id":"msgbatch_01Ya473eco8sTHbvRymQaU8o","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2006,\n      \"finding\": \"BBS10 encodes a vertebrate-specific chaperonin-like protein; morpholino-based suppression of bbs10 in zebrafish exacerbated the phenotypes of other bbs morphants, placing BBS10 in a common pathway with other BBS genes consistent with oligogenic inheritance.\",\n      \"method\": \"Positional cloning, sequence analysis, zebrafish morpholino knockdown with epistasis testing\",\n      \"journal\": \"Nature genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — zebrafish genetic epistasis across multiple BBS genes, replicated in large multi-ethnic cohort; foundational paper with 223 citations\",\n      \"pmids\": [\"16582908\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"BBS10 protein forms part of a chaperone complex localized at the basal body of the primary cilium; complete Bbs10 knockout mice develop obesity, retinal degeneration, glomerular structural defects, and polyuria with elevated arginine vasopressin, whereas renal-epithelial-specific knockout (Cdh16-Cre) produces no detectable impairment, demonstrating that systemic rather than cell-autonomous renal BBS10 loss drives renal dysfunction.\",\n      \"method\": \"Conditional and complete knockout mouse models, immunofluorescence localization, physiological phenotyping (body weight, ERG, renal histology, urine output, serum AVP)\",\n      \"journal\": \"Cilia\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KO/conditional KO with multiple defined phenotypic readouts; systemic vs. tissue-specific comparison provides mechanistic insight\",\n      \"pmids\": [\"26273430\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"BBS10 (together with BBS6 and BBS12) encodes chaperonin-like proteins important for the assembly of the multiprotein BBSome complex encoded by other BBS genes; loss-of-function in BBS10 disrupts BBSome assembly.\",\n      \"method\": \"iPSC generation from BBS10 patient (c.271insT), literature-based mechanistic summary of chaperonin role in BBSome assembly\",\n      \"journal\": \"Stem cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — mechanistic claim supported by prior literature, iPSC resource paper; single method, moderate evidence\",\n      \"pmids\": [\"30312873\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Mass spectrometry-based interactome analysis of BBS10 in IMCD3 cells identified putative BBS10 interactors involved in renal metabolism, RNA processing, and cell proliferation; Bbs10-invalidated IMCD3 cells showed increased proliferation, increased ATP production, and up-regulation of aerobic glycolysis, revealing extraciliary metabolic functions of BBS10.\",\n      \"method\": \"Stable Bbs10 knockout in IMCD3 cells, mass spectrometry-based proteomics/interactome, metabolic assays (ATP measurement, glycolysis), urine metabolomics in BBS patients\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2/3 — MS interactome plus cellular metabolic phenotype in KO cells; single lab, multiple orthogonal methods\",\n      \"pmids\": [\"36012682\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Truncating C-terminal mutations in BBS10 reduce protein stability via accelerated degradation through the ubiquitin-proteasome pathway, impair protein-protein interactions with BBS12 and the core BBSome subunit BBS7, and lead to shortened ciliary length in hTERT-RPE1 cells, while mutant protein still localizes to primary cilia.\",\n      \"method\": \"Transfection of mutant BBS10 constructs in HEK293T and hTERT-RPE1 cells, Western blot (protein stability), co-immunoprecipitation (interaction with BBS7 and BBS12), immunofluorescence (ciliogenesis and ciliary length measurement), proteasome inhibitor experiments\",\n      \"journal\": \"Experimental eye research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal co-IP, Western blot stability assay, and ciliogenesis readout in two cell lines; single lab but multiple orthogonal methods\",\n      \"pmids\": [\"40914337\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"A rare missense variant in BBS10 (c.1189A>G, p.Ile397Val) confers risk of type 2 diabetes in a recessive state; zebrafish in vivo modeling confirmed the variant is pathogenic, implicating BBS10 function in metabolic regulation beyond canonical ciliopathy phenotypes.\",\n      \"method\": \"RAFT statistical genetics method, zebrafish in vivo pathogenicity testing of BBS10 variant\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vivo zebrafish functional validation of specific variant; single study\",\n      \"pmids\": [\"25439097\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"BBS10 is a vertebrate-specific chaperonin-like protein that localizes to the basal body of the primary cilium, where it forms a chaperone complex with BBS6 and BBS12 to facilitate assembly of the BBSome; truncating mutations destabilize BBS10 via the ubiquitin-proteasome pathway, disrupt its interactions with BBS7 and BBS12, and impair ciliary length, while systemic loss of BBS10 drives obesity, retinal degeneration, and renal dysfunction through mechanisms that extend beyond renal epithelial cell-autonomous ciliary defects to include altered cellular metabolism including up-regulation of aerobic glycolysis.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"BBS10 is a vertebrate-specific chaperonin-like protein that functions at the basal body of the primary cilium to promote assembly of the BBSome, a multiprotein complex essential for ciliary trafficking. Together with BBS6 and BBS12, BBS10 forms a chaperone subcomplex that facilitates BBSome assembly; truncating mutations destabilize BBS10 via the ubiquitin–proteasome pathway, disrupt its interactions with BBS7 and BBS12, and shorten ciliary length [PMID:16582908, PMID:30312873, PMID:40914337]. Loss of BBS10 in mice causes obesity, retinal degeneration, and renal dysfunction driven by systemic rather than renal-epithelial-cell-autonomous mechanisms, and BBS10-null renal cells exhibit increased proliferation and a metabolic shift toward aerobic glycolysis, indicating extraciliary roles in cellular metabolism [PMID:26273430, PMID:36012682]. Biallelic mutations in BBS10 cause Bardet-Biedl syndrome, and a rare recessive missense variant independently confers risk for type 2 diabetes [PMID:16582908, PMID:25439097].\",\n  \"teleology\": [\n    {\n      \"year\": 2006,\n      \"claim\": \"Positional cloning identified BBS10 as a vertebrate-specific chaperonin-like gene whose disruption participates in a common genetic pathway with other BBS loci, establishing the molecular identity and epistatic context of BBS10.\",\n      \"evidence\": \"Positional cloning with sequence analysis and zebrafish morpholino epistasis testing across multiple BBS genes in a large multi-ethnic cohort\",\n      \"pmids\": [\"16582908\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Direct biochemical demonstration of chaperonin activity was not provided\",\n        \"The specific protein partners and cargo of BBS10 were not identified\",\n        \"Whether BBS10 functions outside the cilium was unknown\"\n      ]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"A recessive BBS10 missense variant was shown to confer type 2 diabetes risk independently of classical ciliopathy, broadening BBS10's functional scope to metabolic regulation.\",\n      \"evidence\": \"RAFT statistical genetics method followed by zebrafish in vivo pathogenicity assay of the p.Ile397Val variant\",\n      \"pmids\": [\"25439097\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"The cellular mechanism by which this variant alters glucose homeostasis was not determined\",\n        \"Replication in independent human cohorts was not shown\",\n        \"Whether the effect is cilium-dependent or cilium-independent was not resolved\"\n      ]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Complete versus tissue-specific knockout in mice established that BBS10 loss drives obesity, retinal degeneration, and renal dysfunction through systemic rather than renal-epithelial-cell-autonomous mechanisms, resolving whether kidney pathology is intrinsic to ciliary defects in renal tubules.\",\n      \"evidence\": \"Whole-body and Cdh16-Cre conditional Bbs10 knockout mice with ERG, renal histology, body weight, urine output, and serum AVP measurements\",\n      \"pmids\": [\"26273430\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"The non-renal tissues or systemic signals responsible for the renal phenotype were not identified\",\n        \"Neuronal or hypothalamic contributions to the obesity phenotype were not dissected\",\n        \"Whether BBS10 has functions beyond BBSome assembly in vivo was not tested\"\n      ]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Patient-derived iPSCs confirmed that BBS10, together with BBS6 and BBS12, forms a chaperonin subcomplex required for BBSome assembly, providing a human cellular system consistent with the chaperone model.\",\n      \"evidence\": \"iPSC derivation from a BBS10 patient carrying the c.271insT mutation, with reference to prior biochemical evidence of BBS6/10/12 chaperonin complex\",\n      \"pmids\": [\"30312873\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Direct reconstitution of BBSome assembly dependent on the BBS6/10/12 complex was not performed in this study\",\n        \"Functional phenotyping of the iPSC-derived cells was not reported\"\n      ]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Proteomic and metabolic profiling of Bbs10-knockout renal cells revealed extraciliary functions including altered proliferation, increased ATP production, and upregulated aerobic glycolysis, answering whether BBS10 has roles beyond ciliary structure.\",\n      \"evidence\": \"Mass spectrometry interactomics and metabolic assays (ATP, glycolysis) in Bbs10-knockout IMCD3 cells, with urine metabolomics in BBS patients\",\n      \"pmids\": [\"36012682\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"The interactors identified by MS have not been validated by reciprocal co-IP or functional assays\",\n        \"Whether the metabolic shift is a direct consequence of BBS10 loss or secondary to disrupted BBSome trafficking is unresolved\",\n        \"In vivo relevance of the glycolytic shift to BBS pathophysiology was not demonstrated\"\n      ]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Biochemical dissection of disease-causing truncating mutations showed that C-terminal integrity is required for BBS10 protein stability (via protection from ubiquitin–proteasome degradation) and for interaction with BBS12 and BBS7, linking genotype to ciliogenesis defects.\",\n      \"evidence\": \"Overexpression of mutant BBS10 constructs in HEK293T and hTERT-RPE1 cells with co-immunoprecipitation, Western blot stability assays, proteasome inhibitor rescue, and ciliary length measurements\",\n      \"pmids\": [\"40914337\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Experiments relied on overexpressed tagged constructs rather than endogenous protein\",\n        \"Whether reduced interaction with BBS7 is the proximate cause of shortened cilia was not tested directly\",\n        \"Structural basis for how the C-terminal domain stabilizes BBS10 and mediates partner binding is unknown\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The precise mechanism by which BBS10 chaperone activity promotes BBSome assembly, the structural basis of the BBS6/10/12 complex, and the molecular pathways linking BBS10 loss to metabolic reprogramming and systemic (non-cell-autonomous) organ pathology remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"No reconstituted in vitro BBSome assembly assay with purified BBS6/10/12 complex exists\",\n        \"No high-resolution structure of BBS10 or the BBS6/10/12 chaperonin complex is available\",\n        \"The systemic signals or cell types responsible for non-cell-autonomous renal and metabolic pathology have not been identified\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0044183\", \"supporting_discovery_ids\": [0, 2, 4]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [1, 4]},\n      {\"term_id\": \"GO:0005929\", \"supporting_discovery_ids\": [1, 4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1852241\", \"supporting_discovery_ids\": [0, 1, 2, 4]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [3, 5]}\n    ],\n    \"complexes\": [\n      \"BBS6/BBS10/BBS12 chaperonin complex\",\n      \"BBSome\"\n    ],\n    \"partners\": [\n      \"BBS6\",\n      \"BBS12\",\n      \"BBS7\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}