{"gene":"SNCAIP","run_date":"2026-04-28T20:42:08","timeline":{"discoveries":[{"year":1999,"finding":"Synphilin-1 (SNCAIP) was identified as a direct interaction partner of alpha-synuclein via yeast two-hybrid screening, and co-transfection of both proteins in HEK 293 cells produced cytoplasmic eosinophilic inclusions resembling Lewy bodies, establishing synphilin-1's role in promoting cytosolic inclusion formation.","method":"Yeast two-hybrid screen, in vivo co-immunoprecipitation in neurons, co-transfection in HEK 293 cells","journal":"Nature genetics","confidence":"High","confidence_rationale":"Tier 1-2 — foundational discovery using multiple orthogonal methods (Y2H, in vivo co-IP, cell transfection), highly cited, replicated across subsequent studies","pmids":["10319874"],"is_preprint":false},{"year":2006,"finding":"Synphilin-1A, an alternative isoform encoded by SNCAIP with a distinct exon organization and reading frame, has enhanced aggregatory properties compared to synphilin-1, binds alpha-synuclein, induces intracellular aggregate formation in HEK 293 cells, primary neuronal cultures and dopaminergic cells, causes neurotoxicity upon overexpression in neurons, and is present in Lewy bodies of Parkinson's disease and Diffuse Lewy Body disease patients.","method":"Molecular cloning, co-transfection/overexpression in cell lines and primary neurons, detergent-insolubility fractionation of patient brain tissue, immunohistochemistry","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods including in vitro cell assays, primary neuronal cultures, and human tissue validation","pmids":["16595633"],"is_preprint":false},{"year":2000,"finding":"The human SNCAIP gene contains ten exons encoding synphilin-1, maps to chromosome 5q23.1-23.3, and synphilin-1 protein is present in neuropil of human postmortem brain tissue, with a distribution similar to alpha-synuclein.","method":"Genomic cloning and exon mapping, chromosomal mapping, immunohistochemistry of human postmortem brain","journal":"Mammalian genome : official journal of the International Mammalian Genome Society","confidence":"Medium","confidence_rationale":"Tier 2 — direct gene structure determination and localization by IHC, but localization finding is descriptive without functional consequence linked","pmids":["10967135"],"is_preprint":false},{"year":2004,"finding":"Synphilin-1 is linked to ubiquitin-mediated protein degradation and synaptic function; extensive in vitro studies identified novel synphilin-1-interacting proteins and an R621C mutation as a susceptibility factor for Parkinson's disease.","method":"In vitro interaction studies, mutational analysis","journal":"Cell and tissue research","confidence":"Low","confidence_rationale":"Tier 3 — review summarizing in vitro findings without primary data presented in this abstract","pmids":["15322916"],"is_preprint":false},{"year":2021,"finding":"In yeast models, disruption of the glyoxalase system (Glo2) and aldose reductase (Gre3) increased formation of large Synphilin-1 inclusions, correlating with enhanced oxidative stress and inhibition of exponential growth, likely through deregulation of autophagic degradation capacity due to excessive aggresome build-up.","method":"Expression of dsRed-tagged human SNCAIP in S. cerevisiae and S. pombe strains deleted for Glo1, Glo2, and Gre3; fluorescence microscopy; growth assays","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2 — direct functional experiments in yeast model with multiple genetic deletions and phenotypic readouts","pmids":["33562355"],"is_preprint":false},{"year":2023,"finding":"Expression of human Synphilin-1 in Drosophila serotonergic neurons caused olfactory and visual symptoms, while expression in dopaminergic neurons caused motor symptoms and reduced survival, establishing circuit-specific contributions to Parkinson's-like phenotypes; chronic nicotine treatment suppressed several of these symptoms.","method":"Targeted transgenic expression in Drosophila serotonergic and/or dopaminergic neurons, behavioral assays, survival analysis, nicotine treatment","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 — circuit-specific epistasis via cell-type targeted expression with defined behavioral phenotypic readouts in a validated PD model organism","pmids":["36857384"],"is_preprint":false},{"year":2015,"finding":"Porcine synphilin-1 splice variants lacking one or more exons were identified; the encoded isoforms lack functional domains important for protein degradation, suggesting domain-specific roles of synphilin-1 in proteolytic pathways.","method":"RT-PCR cloning of porcine SNCAIP cDNA, RNAseq expression profiling, domain analysis of splice variants","journal":"Meta gene","confidence":"Low","confidence_rationale":"Tier 3 — molecular characterization of splice variants with domain inference but no direct functional assay of the pig isoforms","pmids":["26101749"],"is_preprint":false}],"current_model":"Synphilin-1 (SNCAIP) is an alpha-synuclein-interacting protein that, when co-expressed with alpha-synuclein, promotes the formation of cytoplasmic inclusions resembling Lewy bodies; an alternative isoform (synphilin-1A) with enhanced aggregatory properties causes neurotoxicity in neurons, is present in patient Lewy bodies, and links SNCAIP to ubiquitin-mediated protein degradation, with circuit-specific dopaminergic and serotonergic contributions to Parkinson's-like phenotypes established in Drosophila models."},"narrative":{"teleology":[{"year":1999,"claim":"Establishing that alpha-synuclein has a cytoplasmic binding partner capable of driving inclusion formation resolved how synuclein aggregation might be nucleated in vivo and identified synphilin-1 as a candidate Lewy body component.","evidence":"Yeast two-hybrid screen, co-immunoprecipitation from neuronal lysates, and co-transfection in HEK 293 cells producing eosinophilic inclusions","pmids":["10319874"],"confidence":"High","gaps":["Whether synphilin-1 is required for Lewy body formation in vivo was not tested","The structural determinants of the synphilin-1/alpha-synuclein interaction were not mapped","Post-translational modifications regulating this interaction were not addressed"]},{"year":2000,"claim":"Mapping the SNCAIP gene structure to chromosome 5q23.1-23.3 and demonstrating synphilin-1 protein in brain neuropil with a distribution paralleling alpha-synuclein provided anatomical plausibility for their in vivo interaction.","evidence":"Genomic cloning, exon mapping, chromosomal localization, and immunohistochemistry of human postmortem brain","pmids":["10967135"],"confidence":"Medium","gaps":["Co-localization at the subcellular level with alpha-synuclein was not demonstrated","Expression in disease-affected versus unaffected brain regions was not compared"]},{"year":2006,"claim":"Discovery of synphilin-1A, an alternative isoform with enhanced aggregation and neurotoxicity present in patient Lewy bodies, established that SNCAIP isoform diversity directly modulates pathogenicity and linked the gene to neuronal cell death.","evidence":"Molecular cloning of synphilin-1A, overexpression in HEK 293 cells, primary neurons, and dopaminergic cells; detergent-insolubility fractionation and immunohistochemistry of PD and DLB patient brain tissue","pmids":["16595633"],"confidence":"High","gaps":["The relative abundance and regulation of synphilin-1A versus synphilin-1 in disease progression is unknown","Whether synphilin-1A aggregation is reversible or targetable was not tested"]},{"year":2021,"claim":"Demonstrating that glyoxalase system disruption enhances synphilin-1 inclusion formation via oxidative stress and impaired autophagic clearance connected synphilin-1 aggregation to metabolic stress pathways.","evidence":"Expression of dsRed-tagged human SNCAIP in yeast strains deleted for Glo1, Glo2, and Gre3; fluorescence microscopy and growth assays","pmids":["33562355"],"confidence":"Medium","gaps":["Whether these metabolic interactions apply in mammalian neurons has not been tested","Direct measurement of autophagic flux was not performed","The mechanism linking glyoxalase deficiency to synphilin-1 aggregation (e.g., methylglyoxal modification) was not resolved"]},{"year":2023,"claim":"Circuit-specific expression in Drosophila revealed that synphilin-1 drives distinct Parkinson's-like phenotypes depending on the neuronal subtype affected, dissociating motor from sensory symptoms.","evidence":"Targeted transgenic expression in Drosophila serotonergic versus dopaminergic neurons with behavioral and survival analyses; nicotine rescue experiments","pmids":["36857384"],"confidence":"Medium","gaps":["Whether circuit-specific phenotypes reflect differential aggregation or differential vulnerability is unresolved","Translation of Drosophila circuit findings to mammalian models has not been attempted","The mechanism of nicotine-mediated suppression was not determined"]},{"year":null,"claim":"The endogenous physiological function of synphilin-1 beyond its role in pathological aggregation remains undefined, and whether loss of synphilin-1 function contributes to neurodegeneration is unknown.","evidence":"","pmids":[],"confidence":"Low","gaps":["No loss-of-function or knockout studies in mammalian models have been reported","No structural model of the synphilin-1/alpha-synuclein complex exists","The normal synaptic function of synphilin-1 is uncharacterized"]}],"mechanism_profile":{"molecular_activity":[],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[0,1]}],"pathway":[{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[0,1,5]}],"complexes":[],"partners":["SNCA"],"other_free_text":[]},"mechanistic_narrative":"Synphilin-1 (SNCAIP) is an alpha-synuclein-interacting protein that promotes the formation of cytoplasmic inclusions resembling Lewy bodies, linking it to the pathogenesis of Parkinson's disease. Identified through yeast two-hybrid screening, synphilin-1 directly binds alpha-synuclein, and co-expression of both proteins in mammalian cells produces eosinophilic cytoplasmic inclusions [PMID:10319874]. An alternative isoform, synphilin-1A, exhibits enhanced aggregatory properties compared to synphilin-1, causes neurotoxicity in primary neurons and dopaminergic cells, and is present in Lewy bodies of Parkinson's disease and Diffuse Lewy Body disease patients, connecting SNCAIP to ubiquitin-mediated protein degradation and neurodegeneration [PMID:16595633]. Circuit-specific expression of synphilin-1 in Drosophila dopaminergic neurons produces motor deficits and reduced survival, while expression in serotonergic neurons causes olfactory and visual symptoms, establishing distinct neuronal circuit contributions to Parkinson's-like phenotypes [PMID:36857384]."},"prefetch_data":{"uniprot":{"accession":"Q9Y6H5","full_name":"Synphilin-1","aliases":["Alpha-synuclein-interacting protein"],"length_aa":919,"mass_kda":100.4,"function":"Isoform 2 inhibits the ubiquitin ligase activity of SIAH1 and inhibits proteasomal degradation of target proteins. Isoform 2 inhibits autoubiquitination and proteasomal degradation of SIAH1, and thereby increases cellular levels of SIAH. Isoform 2 modulates SNCA monoubiquitination by SIAH1","subcellular_location":"Cytoplasm","url":"https://www.uniprot.org/uniprotkb/Q9Y6H5/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/SNCAIP","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/SNCAIP","total_profiled":1310},"omim":[{"mim_id":"607207","title":"STIP1 HOMOLOGOUS AND U BOX-CONTAINING PROTEIN 1; STUB1","url":"https://www.omim.org/entry/607207"},{"mim_id":"604605","title":"KALIRIN; KALRN","url":"https://www.omim.org/entry/604605"},{"mim_id":"603779","title":"SYNUCLEIN-ALPHA-INTERACTING PROTEIN; SNCAIP","url":"https://www.omim.org/entry/603779"},{"mim_id":"300272","title":"HISTONE DEACETYLASE 6; HDAC6","url":"https://www.omim.org/entry/300272"},{"mim_id":"168600","title":"PARKINSON DISEASE, LATE-ONSET; PD","url":"https://www.omim.org/entry/168600"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Cytoplasmic bodies","reliability":"Supported"},{"location":"Nucleoplasm","reliability":"Additional"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"cervix","ntpm":16.1},{"tissue":"endometrium 1","ntpm":18.2},{"tissue":"ovary","ntpm":24.6}],"url":"https://www.proteinatlas.org/search/SNCAIP"},"hgnc":{"alias_symbol":["SYPH1"],"prev_symbol":[]},"alphafold":{"accession":"Q9Y6H5","domains":[{"cath_id":"1.25.40.20","chopping":"312-413","consensus_level":"medium","plddt":88.255,"start":312,"end":413},{"cath_id":"1.25.40.20","chopping":"416-521","consensus_level":"medium","plddt":93.4818,"start":416,"end":521}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y6H5","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y6H5-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y6H5-F1-predicted_aligned_error_v6.png","plddt_mean":51.59},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=SNCAIP","jax_strain_url":"https://www.jax.org/strain/search?query=SNCAIP"},"sequence":{"accession":"Q9Y6H5","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9Y6H5.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9Y6H5/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y6H5"}},"corpus_meta":[{"pmid":"22832581","id":"PMC_22832581","title":"Subgroup-specific 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co-transfection of both proteins in HEK 293 cells produced cytoplasmic eosinophilic inclusions resembling Lewy bodies, establishing synphilin-1's role in promoting cytosolic inclusion formation.\",\n      \"method\": \"Yeast two-hybrid screen, in vivo co-immunoprecipitation in neurons, co-transfection in HEK 293 cells\",\n      \"journal\": \"Nature genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — foundational discovery using multiple orthogonal methods (Y2H, in vivo co-IP, cell transfection), highly cited, replicated across subsequent studies\",\n      \"pmids\": [\"10319874\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"Synphilin-1A, an alternative isoform encoded by SNCAIP with a distinct exon organization and reading frame, has enhanced aggregatory properties compared to synphilin-1, binds alpha-synuclein, induces intracellular aggregate formation in HEK 293 cells, primary neuronal cultures and dopaminergic cells, causes neurotoxicity upon overexpression in neurons, and is present in Lewy bodies of Parkinson's disease and Diffuse Lewy Body disease patients.\",\n      \"method\": \"Molecular cloning, co-transfection/overexpression in cell lines and primary neurons, detergent-insolubility fractionation of patient brain tissue, immunohistochemistry\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods including in vitro cell assays, primary neuronal cultures, and human tissue validation\",\n      \"pmids\": [\"16595633\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"The human SNCAIP gene contains ten exons encoding synphilin-1, maps to chromosome 5q23.1-23.3, and synphilin-1 protein is present in neuropil of human postmortem brain tissue, with a distribution similar to alpha-synuclein.\",\n      \"method\": \"Genomic cloning and exon mapping, chromosomal mapping, immunohistochemistry of human postmortem brain\",\n      \"journal\": \"Mammalian genome : official journal of the International Mammalian Genome Society\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct gene structure determination and localization by IHC, but localization finding is descriptive without functional consequence linked\",\n      \"pmids\": [\"10967135\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Synphilin-1 is linked to ubiquitin-mediated protein degradation and synaptic function; extensive in vitro studies identified novel synphilin-1-interacting proteins and an R621C mutation as a susceptibility factor for Parkinson's disease.\",\n      \"method\": \"In vitro interaction studies, mutational analysis\",\n      \"journal\": \"Cell and tissue research\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — review summarizing in vitro findings without primary data presented in this abstract\",\n      \"pmids\": [\"15322916\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In yeast models, disruption of the glyoxalase system (Glo2) and aldose reductase (Gre3) increased formation of large Synphilin-1 inclusions, correlating with enhanced oxidative stress and inhibition of exponential growth, likely through deregulation of autophagic degradation capacity due to excessive aggresome build-up.\",\n      \"method\": \"Expression of dsRed-tagged human SNCAIP in S. cerevisiae and S. pombe strains deleted for Glo1, Glo2, and Gre3; fluorescence microscopy; growth assays\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct functional experiments in yeast model with multiple genetic deletions and phenotypic readouts\",\n      \"pmids\": [\"33562355\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Expression of human Synphilin-1 in Drosophila serotonergic neurons caused olfactory and visual symptoms, while expression in dopaminergic neurons caused motor symptoms and reduced survival, establishing circuit-specific contributions to Parkinson's-like phenotypes; chronic nicotine treatment suppressed several of these symptoms.\",\n      \"method\": \"Targeted transgenic expression in Drosophila serotonergic and/or dopaminergic neurons, behavioral assays, survival analysis, nicotine treatment\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — circuit-specific epistasis via cell-type targeted expression with defined behavioral phenotypic readouts in a validated PD model organism\",\n      \"pmids\": [\"36857384\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Porcine synphilin-1 splice variants lacking one or more exons were identified; the encoded isoforms lack functional domains important for protein degradation, suggesting domain-specific roles of synphilin-1 in proteolytic pathways.\",\n      \"method\": \"RT-PCR cloning of porcine SNCAIP cDNA, RNAseq expression profiling, domain analysis of splice variants\",\n      \"journal\": \"Meta gene\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — molecular characterization of splice variants with domain inference but no direct functional assay of the pig isoforms\",\n      \"pmids\": [\"26101749\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"Synphilin-1 (SNCAIP) is an alpha-synuclein-interacting protein that, when co-expressed with alpha-synuclein, promotes the formation of cytoplasmic inclusions resembling Lewy bodies; an alternative isoform (synphilin-1A) with enhanced aggregatory properties causes neurotoxicity in neurons, is present in patient Lewy bodies, and links SNCAIP to ubiquitin-mediated protein degradation, with circuit-specific dopaminergic and serotonergic contributions to Parkinson's-like phenotypes established in Drosophila models.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"Synphilin-1 (SNCAIP) is an alpha-synuclein-interacting protein that promotes the formation of cytoplasmic inclusions resembling Lewy bodies, linking it to the pathogenesis of Parkinson's disease. Identified through yeast two-hybrid screening, synphilin-1 directly binds alpha-synuclein, and co-expression of both proteins in mammalian cells produces eosinophilic cytoplasmic inclusions [PMID:10319874]. An alternative isoform, synphilin-1A, exhibits enhanced aggregatory properties compared to synphilin-1, causes neurotoxicity in primary neurons and dopaminergic cells, and is present in Lewy bodies of Parkinson's disease and Diffuse Lewy Body disease patients, connecting SNCAIP to ubiquitin-mediated protein degradation and neurodegeneration [PMID:16595633]. Circuit-specific expression of synphilin-1 in Drosophila dopaminergic neurons produces motor deficits and reduced survival, while expression in serotonergic neurons causes olfactory and visual symptoms, establishing distinct neuronal circuit contributions to Parkinson's-like phenotypes [PMID:36857384].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Establishing that alpha-synuclein has a cytoplasmic binding partner capable of driving inclusion formation resolved how synuclein aggregation might be nucleated in vivo and identified synphilin-1 as a candidate Lewy body component.\",\n      \"evidence\": \"Yeast two-hybrid screen, co-immunoprecipitation from neuronal lysates, and co-transfection in HEK 293 cells producing eosinophilic inclusions\",\n      \"pmids\": [\"10319874\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether synphilin-1 is required for Lewy body formation in vivo was not tested\",\n        \"The structural determinants of the synphilin-1/alpha-synuclein interaction were not mapped\",\n        \"Post-translational modifications regulating this interaction were not addressed\"\n      ]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Mapping the SNCAIP gene structure to chromosome 5q23.1-23.3 and demonstrating synphilin-1 protein in brain neuropil with a distribution paralleling alpha-synuclein provided anatomical plausibility for their in vivo interaction.\",\n      \"evidence\": \"Genomic cloning, exon mapping, chromosomal localization, and immunohistochemistry of human postmortem brain\",\n      \"pmids\": [\"10967135\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Co-localization at the subcellular level with alpha-synuclein was not demonstrated\",\n        \"Expression in disease-affected versus unaffected brain regions was not compared\"\n      ]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Discovery of synphilin-1A, an alternative isoform with enhanced aggregation and neurotoxicity present in patient Lewy bodies, established that SNCAIP isoform diversity directly modulates pathogenicity and linked the gene to neuronal cell death.\",\n      \"evidence\": \"Molecular cloning of synphilin-1A, overexpression in HEK 293 cells, primary neurons, and dopaminergic cells; detergent-insolubility fractionation and immunohistochemistry of PD and DLB patient brain tissue\",\n      \"pmids\": [\"16595633\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"The relative abundance and regulation of synphilin-1A versus synphilin-1 in disease progression is unknown\",\n        \"Whether synphilin-1A aggregation is reversible or targetable was not tested\"\n      ]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Demonstrating that glyoxalase system disruption enhances synphilin-1 inclusion formation via oxidative stress and impaired autophagic clearance connected synphilin-1 aggregation to metabolic stress pathways.\",\n      \"evidence\": \"Expression of dsRed-tagged human SNCAIP in yeast strains deleted for Glo1, Glo2, and Gre3; fluorescence microscopy and growth assays\",\n      \"pmids\": [\"33562355\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Whether these metabolic interactions apply in mammalian neurons has not been tested\",\n        \"Direct measurement of autophagic flux was not performed\",\n        \"The mechanism linking glyoxalase deficiency to synphilin-1 aggregation (e.g., methylglyoxal modification) was not resolved\"\n      ]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Circuit-specific expression in Drosophila revealed that synphilin-1 drives distinct Parkinson's-like phenotypes depending on the neuronal subtype affected, dissociating motor from sensory symptoms.\",\n      \"evidence\": \"Targeted transgenic expression in Drosophila serotonergic versus dopaminergic neurons with behavioral and survival analyses; nicotine rescue experiments\",\n      \"pmids\": [\"36857384\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Whether circuit-specific phenotypes reflect differential aggregation or differential vulnerability is unresolved\",\n        \"Translation of Drosophila circuit findings to mammalian models has not been attempted\",\n        \"The mechanism of nicotine-mediated suppression was not determined\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The endogenous physiological function of synphilin-1 beyond its role in pathological aggregation remains undefined, and whether loss of synphilin-1 function contributes to neurodegeneration is unknown.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"No loss-of-function or knockout studies in mammalian models have been reported\",\n        \"No structural model of the synphilin-1/alpha-synuclein complex exists\",\n        \"The normal synaptic function of synphilin-1 is uncharacterized\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [0, 1]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [0, 1, 5]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"SNCA\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}