{"gene":"SCAMP5","run_date":"2026-04-28T20:42:07","timeline":{"discoveries":[{"year":2010,"finding":"SCAMP5 functions as a negative regulator of large dense-core vesicle (LDCV) secretion; gene silencing of Scamp5 in mouse beta-TC3 cells resulted in a 2-fold increase in stimulated LDCV secretion, while overexpression suppressed secretion.","method":"Gene silencing (shRNA/siRNA) and overexpression in mouse beta-TC3 cells with functional secretion assay; ultrastructural analysis of dense-core granules in patient platelets","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 — clean KD and OE with defined cellular phenotype, but single lab","pmids":["20071347"],"is_preprint":false},{"year":2009,"finding":"SCAMP5 impairs endocytosis, and increased SCAMP5 expression (induced by ER stress) enhances accumulation of mutant huntingtin (mtHTT) aggregates via the endocytosis pathway; downregulation of SCAMP5 alleviates ER stress-induced mtHTT aggregation.","method":"Cell-based aggregation assays, ectopic expression and knockdown of SCAMP5 in cultured striatal neurons, stereotactic and intraperitoneal injection of tunicamycin in R6/2 and N171-82Q mice","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 — KD and OE with defined cellular phenotype and in vivo validation, single lab","pmids":["19240033"],"is_preprint":false},{"year":2009,"finding":"SCAMP5 localizes primarily to Golgi-associated compartments and translocates to the plasma membrane upon calcium ionophore (ionomycin) stimulation; SCAMP5 directly interacts with synaptotagmins via its cytosolic C-terminal tail, and complexes with SNARE molecules during this translocation, promoting calcium-regulated exocytosis of signal peptide-containing cytokines (CCL5).","method":"Subcellular fractionation, immunofluorescence confocal microscopy, membrane vesicle immunoisolation, Co-IP, cytokine secretion assays in human epithelial cancer cells, monocytes, and mouse macrophages","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods (fractionation, imaging, Co-IP, functional assay) in single study","pmids":["19234194"],"is_preprint":false},{"year":2014,"finding":"SCAMP5 is critical for synaptic vesicle (SV) endocytosis specifically during high neuronal activity; SCAMP5 knockdown in rat hippocampal neurons reduced total and recycling pool size, slowed endocytosis after stimulation, and severely impaired it during strong stimulation, lowering the threshold at which endocytosis could not compensate for ongoing exocytosis.","method":"shRNA knockdown with shRNA-resistant rescue in cultured rat hippocampal neurons; optical imaging of SV recycling pools","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 — clean KD with rescue experiment and defined synaptic phenotype, moderate evidence","pmids":["25057210"],"is_preprint":false},{"year":2018,"finding":"SCAMP5 plays a critical role in release site clearance at the active zone; the 2/3 loop domain of SCAMP5 directly interacts with adaptor protein 2 (AP2), and this interaction is required for efficient clearance of SV proteins from the active zone after exocytosis. SCAMP5 knockdown causes pronounced synaptic depression and frequency-dependent short-term depression.","method":"Truncation analysis for domain mapping, optical imaging, electrophysiology, super-resolution microscopy, knockdown in hippocampal neurons","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 1–2 — domain truncation mapping of direct interaction + multiple functional readouts (electrophysiology, super-resolution imaging)","pmids":["29562188"],"is_preprint":false},{"year":2020,"finding":"The SCAMP5 R91W mutation affects the interaction between SCAMP5 and synaptotagmin 1, disrupting SNARE complex function, and increases the frequency of miniature excitatory postsynaptic currents and amplitude of evoked EPSCs, shifting the excitation/inhibition balance in brain neuronal networks.","method":"Knock-in mouse model (R91W), single-neuron electrophysiological recordings, protein interaction analysis","journal":"Human genetics","confidence":"Medium","confidence_rationale":"Tier 2 — knock-in mouse with defined electrophysiological phenotype and interaction disruption, single lab","pmids":["32020363"],"is_preprint":false},{"year":2021,"finding":"SCAMP5 directly interacts with the cation/H+ exchanger NHE6 via the 2/3 loop domain of SCAMP5 and the C-terminal region of NHE6; this interaction regulates axonal trafficking and presynaptic localization of NHE6. SCAMP5 KD inhibits NHE6 recruitment to presynaptic terminals, causing hyperacidification of SVs and reduction in glutamate quantal size. NHE6 knockout occluded the effect of SCAMP5 KD (genetic epistasis).","method":"Truncated construct protein-protein interaction analysis, shRNA knockdown, optical imaging, electrophysiological recording, genetic epistasis (NHE6 KO + SCAMP5 KD) in hippocampal neurons","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1–2 — domain mapping, epistasis, multiple functional readouts, single lab with strong orthogonal methods","pmids":["33372133"],"is_preprint":false},{"year":2021,"finding":"SCAMP5-dependent recruitment of NHE6 to synaptic vesicles is enhanced during chemical LTP (cLTP), with increased NHE6-positive presynaptic boutons; SCAMP5 knockdown completely abrogated this cLTP-induced enhancement of NHE6 recruitment, indicating a role for SCAMP5 in presynaptic plasticity.","method":"Chemical LTP induction, shRNA knockdown, optical imaging of NHE6-positive boutons in hippocampal neurons","journal":"Molecular brain","confidence":"Medium","confidence_rationale":"Tier 2 — KD with defined plasticity phenotype, single lab, extends prior finding","pmids":["33663553"],"is_preprint":false},{"year":2021,"finding":"SCAMP5 localizes to the Golgi apparatus and dynamically traffics to the cell surface along the interferon secretory pathway in plasmacytoid dendritic cells (pDCs); lentiviral expression in HEK cells was used to confirm subcellular distribution alongside the IFN secretory pathway.","method":"Lentiviral overexpression, immunofluorescence, live-cell imaging for Golgi-cell surface trafficking in pDCs and transfected cells","journal":"Lupus science & medicine","confidence":"Low","confidence_rationale":"Tier 3 — localization by imaging with partial functional correlation, single lab","pmids":["34728555"],"is_preprint":false},{"year":2022,"finding":"SCAMP5 colocalizes with IFNα in activated human plasmacytoid dendritic cells, supporting a role of SCAMP5 in type I IFN secretory trafficking.","method":"ImageStream technology measuring bright detail similarity (BDS) scores for SCAMP5/IFNα colocalization in freshly isolated human pDCs","journal":"Lupus science & medicine","confidence":"Low","confidence_rationale":"Tier 3 — colocalization only, no functional manipulation, single lab","pmids":["35296555"],"is_preprint":false},{"year":2025,"finding":"SCAMP5 deficiency in pancreatic β-cells reduces insulin secretion (involving reduced CaV1.2 expression) and triggers apoptosis; SCAMP5 interacts with VDAC1 and downregulates its protein expression, thereby repressing VDAC1-recruited Bax translocation to mitochondria and inhibiting cytochrome c release, preventing apoptosis. Hyperglycemia-activated ChREBP epigenetically represses SCAMP5 expression by reducing H3K4me3 at the Scamp5 promoter.","method":"Co-IP (SCAMP5-VDAC1 interaction), knockdown/overexpression in β-cell lines, ChIP for H3K4me3, functional apoptosis and secretion assays","journal":"Advanced science","confidence":"Medium","confidence_rationale":"Tier 2 — Co-IP, ChIP, and multiple functional assays in single study, single lab","pmids":["40953307"],"is_preprint":false},{"year":2025,"finding":"SCAMP5 deficiency increases α-synuclein protein and oligomers in PC12 cells leading to increased apoptosis and decreased dopamine secretion; SCAMP5 knockdown in SH-SY5Y cells reduces α-synuclein secretion via exosomes; R91W mutant fails to rescue these effects; scamp5a knockout zebrafish show Parkinson's-like phenotypes including loss of dopamine neurons and upregulated JNK signaling.","method":"SCAMP5 knockdown in PC12 and SH-SY5Y cells, exosome isolation, α-synuclein quantification, scamp5a knockout zebrafish, transcriptome analysis","journal":"Human genetics","confidence":"Medium","confidence_rationale":"Tier 2 — KD/KO with defined molecular and cellular phenotypes across cell lines and in vivo model, single lab","pmids":["41186735"],"is_preprint":false},{"year":2025,"finding":"SCAMP5 acts as a novel binding partner of PI4KB (PI4KIIIβ), controlling its recruitment to the TGN and subsequent PtdIns4P production; since PtdIns4P is required for AP-4 recruitment, SCAMP5 depletion disrupts AP-4-mediated ATG9A trafficking to presynaptic sites, impairing presynaptic autophagosome formation and protein turnover.","method":"Co-IP (SCAMP5-PI4KB), SCAMP5 knockdown, fluorescence imaging of ATG9A trafficking and autophagosome formation at presynaptic boutons in hippocampal neurons","journal":"Autophagy","confidence":"High","confidence_rationale":"Tier 2 — Co-IP identifying novel binding partner, KD with defined trafficking and autophagy phenotype, mechanistic pathway established","pmids":["40958389"],"is_preprint":false},{"year":2025,"finding":"SCAMP5 selectively regulates recycling of VGLUT2-containing synaptic vesicles but not VMAT2-containing monoaminergic SVs; loss of differentially expressed SCAMP5 impairs VGLUT2 SV recycling in neurons expressing both vesicle types.","method":"CRISPR knock-in mouse (HA-VMAT2) for SV immunoisolation, proteomics, loss-of-function analysis in primary neurons comparing VGLUT2 vs VMAT2 SV recycling","journal":"bioRxiv","confidence":"Medium","confidence_rationale":"Tier 2 — functional loss-of-function with SV-type-specific recycling phenotype; preprint, not yet peer reviewed","pmids":["bio_10.1101_2025.05.06.651945"],"is_preprint":true}],"current_model":"SCAMP5 is a brain-enriched synaptic vesicle membrane protein that functions at multiple steps of vesicular trafficking: it promotes synaptic vesicle endocytosis (especially under high activity), facilitates active-zone release site clearance via direct interaction of its 2/3 loop domain with AP2, recruits NHE6 to glutamatergic presynaptic terminals (regulating quantal size), orchestrates presynaptic autophagy by binding PI4KB at the TGN to drive PtdIns4P-dependent AP-4-mediated ATG9A trafficking, interacts with synaptotagmin and SNARE machinery to regulate calcium-triggered exocytosis, and interacts with VDAC1 to suppress apoptosis in secretory cells—with its dysfunction linked to autism, epilepsy, Parkinson's disease, and diabetes."},"narrative":{"teleology":[{"year":2009,"claim":"Establishing SCAMP5 as a participant in calcium-regulated exocytosis resolved its role beyond generic vesicle trafficking, showing it bridges Golgi-derived compartments to the plasma membrane through interactions with synaptotagmins and SNARE complexes.","evidence":"Subcellular fractionation, Co-IP, confocal imaging, and cytokine secretion assays in human epithelial cells, monocytes, and macrophages","pmids":["19234194"],"confidence":"High","gaps":["Whether SCAMP5-synaptotagmin interaction is direct or scaffold-mediated was not fully resolved","The specific SNARE partners in the complex were not individually identified","Relevance to neuronal synaptic vesicle exocytosis was not tested"]},{"year":2009,"claim":"Demonstrating that ER stress-induced SCAMP5 upregulation impairs endocytosis and promotes mutant huntingtin aggregation revealed SCAMP5 as a modulator of endocytic flux with disease relevance.","evidence":"SCAMP5 overexpression and knockdown in striatal neurons; in vivo tunicamycin injection in Huntington's disease mouse models","pmids":["19240033"],"confidence":"Medium","gaps":["Mechanism by which SCAMP5 impairs endocytosis was not defined","Whether the endocytic impairment is direct or secondary to ER stress signaling remains unclear"]},{"year":2010,"claim":"Identifying SCAMP5 as a negative regulator of large dense-core vesicle secretion in β-cells extended its function beyond constitutive trafficking to regulated secretion in endocrine cells.","evidence":"shRNA knockdown and overexpression in beta-TC3 cells with stimulated secretion assays","pmids":["20071347"],"confidence":"Medium","gaps":["The molecular mechanism of secretion suppression was not identified","Whether the effect is specific to LDCVs or extends to other vesicle types in β-cells was untested"]},{"year":2014,"claim":"Demonstrating that SCAMP5 is selectively required for synaptic vesicle endocytosis during intense neuronal activity established its activity-dependent role at the presynaptic terminal.","evidence":"shRNA knockdown with rescue in cultured rat hippocampal neurons; optical imaging of SV recycling pools","pmids":["25057210"],"confidence":"High","gaps":["The endocytic adaptor or coat machinery engaged by SCAMP5 was not identified","Whether SCAMP5 acts in clathrin-mediated versus bulk endocytosis was unclear"]},{"year":2018,"claim":"Mapping the 2/3 loop domain of SCAMP5 as the site of direct AP-2 interaction and showing its requirement for active-zone release site clearance resolved the molecular basis for its endocytic function and explained the synaptic depression phenotype.","evidence":"Domain truncation mapping, super-resolution microscopy, electrophysiology, knockdown in hippocampal neurons","pmids":["29562188"],"confidence":"High","gaps":["Whether SCAMP5-AP2 interaction recruits clathrin or other coat proteins was not determined","Structural basis of the 2/3 loop–AP2 interaction is unknown"]},{"year":2020,"claim":"The R91W knock-in mouse showed that a disease-associated SCAMP5 mutation disrupts synaptotagmin-1 interaction and shifts excitation/inhibition balance, providing a mechanistic link from molecular interaction to circuit-level dysfunction relevant to autism and epilepsy.","evidence":"Knock-in mouse model, single-neuron electrophysiology, protein interaction analysis","pmids":["32020363"],"confidence":"Medium","gaps":["Whether the R91W mutation also affects the AP-2 or NHE6 interactions was not tested","Behavioral phenotyping of R91W mice was limited"]},{"year":2021,"claim":"Identifying the SCAMP5–NHE6 interaction via the 2/3 loop domain and demonstrating genetic epistasis with NHE6 KO established SCAMP5 as the trafficking receptor that recruits NHE6 to presynaptic terminals, controlling vesicle pH and glutamate quantal size.","evidence":"Domain mapping, shRNA knockdown, NHE6 KO epistasis, electrophysiology and optical imaging in hippocampal neurons","pmids":["33372133","33663553"],"confidence":"High","gaps":["Whether SCAMP5 simultaneously binds AP-2 and NHE6 or these are mutually exclusive interactions is unknown","Whether NHE6 recruitment by SCAMP5 occurs at the Golgi, endosome, or plasma membrane was not resolved"]},{"year":2025,"claim":"Discovery that SCAMP5 binds PI4KB to control TGN PtdIns4P levels, AP-4 recruitment, and ATG9A trafficking to presynaptic sites established SCAMP5 as a key organizer of presynaptic autophagy, a previously unrecognized function.","evidence":"Co-IP for SCAMP5-PI4KB interaction, knockdown with fluorescence imaging of ATG9A trafficking and autophagosome formation in hippocampal neurons","pmids":["40958389"],"confidence":"High","gaps":["Whether the PI4KB interaction uses the same 2/3 loop domain as AP-2 and NHE6 interactions is unknown","Whether presynaptic autophagy deficits contribute to neurodegeneration in SCAMP5 mutant models was not tested"]},{"year":2025,"claim":"Identifying the SCAMP5–VDAC1 interaction in β-cells and showing that SCAMP5 loss triggers Bax-mediated apoptosis revealed a non-neuronal cytoprotective function, while ChREBP-mediated epigenetic silencing under hyperglycemia provided a disease-relevant regulatory mechanism.","evidence":"Co-IP, knockdown/overexpression in β-cell lines, ChIP for H3K4me3 at Scamp5 promoter, apoptosis and secretion assays","pmids":["40953307"],"confidence":"Medium","gaps":["Whether SCAMP5 directly downregulates VDAC1 protein or acts through an intermediate is unclear","In vivo β-cell-specific SCAMP5 knockout has not been reported"]},{"year":2025,"claim":"Linking SCAMP5 deficiency to α-synuclein accumulation, impaired exosomal secretion, and dopamine neuron loss in zebrafish connected SCAMP5 dysfunction to Parkinson's disease-like pathology.","evidence":"Knockdown in PC12 and SH-SY5Y cells, exosome isolation, scamp5a knockout zebrafish with transcriptome analysis","pmids":["41186735"],"confidence":"Medium","gaps":["Whether α-synuclein accumulation is due to impaired secretion, impaired autophagy, or both was not disambiguated","Mammalian in vivo validation of the Parkinson's-like phenotype is lacking"]},{"year":null,"claim":"It remains unknown how SCAMP5 coordinates its multiple binding partners (AP-2, NHE6, PI4KB, synaptotagmin-1, VDAC1) — whether interactions are mutually exclusive, compartment-specific, or regulated by post-translational modifications — and no structural model of any SCAMP5 complex exists.","evidence":"","pmids":[],"confidence":"High","gaps":["No high-resolution structure of SCAMP5 or any SCAMP5-partner complex","Post-translational modifications that might switch between interaction partners are uncharacterized","Conditional knockout mouse models for SCAMP5 in brain have not been reported"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[4,6,12]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[0,3,10]}],"localization":[{"term_id":"GO:0005794","term_label":"Golgi apparatus","supporting_discovery_ids":[2,8,12]},{"term_id":"GO:0031410","term_label":"cytoplasmic vesicle","supporting_discovery_ids":[2,3,4]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[2,8]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[2,3,4,6]},{"term_id":"R-HSA-112316","term_label":"Neuronal System","supporting_discovery_ids":[3,4,5,6]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[12]}],"complexes":[],"partners":["SYT1","AP2","NHE6","PI4KB","VDAC1"],"other_free_text":[]},"mechanistic_narrative":"SCAMP5 is a brain-enriched vesicle membrane protein that orchestrates multiple steps of synaptic vesicle cycling, secretory trafficking, and presynaptic homeostasis. It promotes synaptic vesicle endocytosis during high neuronal activity and facilitates active-zone release site clearance through direct interaction of its 2/3 loop domain with AP-2, while also recruiting the cation/H⁺ exchanger NHE6 to glutamatergic presynaptic terminals to regulate vesicle luminal pH and glutamate quantal size [PMID:25057210, PMID:29562188, PMID:33372133]. SCAMP5 binds PI4KB at the trans-Golgi network to drive PtdIns4P-dependent AP-4-mediated ATG9A trafficking, thereby controlling presynaptic autophagosome biogenesis, and interacts with synaptotagmin-1 and SNARE machinery to regulate calcium-triggered exocytosis—functions disrupted by the autism/epilepsy-associated R91W mutation [PMID:40958389, PMID:19234194, PMID:32020363]. In pancreatic β-cells, SCAMP5 interacts with VDAC1 to suppress Bax-dependent apoptosis and supports insulin secretion, with its expression epigenetically repressed by hyperglycemia-activated ChREBP [PMID:40953307]."},"prefetch_data":{"uniprot":{"accession":"Q8TAC9","full_name":"Secretory carrier-associated membrane protein 5","aliases":[],"length_aa":235,"mass_kda":26.1,"function":"Required for the calcium-dependent exocytosis of signal sequence-containing cytokines such as CCL5. Probably acts in cooperation with the SNARE machinery. May play a role in accumulation of expanded polyglutamine (polyQ) protein huntingtin (HTT) in case of endoplasmic reticulum stress by inhibiting the endocytosis pathway","subcellular_location":"Cell membrane; Golgi apparatus membrane; Golgi apparatus, trans-Golgi network membrane; Recycling endosome membrane; Cytoplasmic vesicle, secretory vesicle, synaptic vesicle membrane","url":"https://www.uniprot.org/uniprotkb/Q8TAC9/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/SCAMP5","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/SCAMP5","total_profiled":1310},"omim":[{"mim_id":"613766","title":"SECRETORY CARRIER MEMBRANE PROTEIN 5; SCAMP5","url":"https://www.omim.org/entry/613766"},{"mim_id":"605104","title":"RNA-BINDING FOX1 HOMOLOG 1; RBFOX1","url":"https://www.omim.org/entry/605104"},{"mim_id":"209850","title":"AUTISM","url":"https://www.omim.org/entry/209850"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"","locations":[],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":200.0},{"tissue":"retina","ntpm":263.3}],"url":"https://www.proteinatlas.org/search/SCAMP5"},"hgnc":{"alias_symbol":["MGC24969"],"prev_symbol":[]},"alphafold":{"accession":"Q8TAC9","domains":[{"cath_id":"1.20.120","chopping":"33-176","consensus_level":"medium","plddt":96.6344,"start":33,"end":176}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8TAC9","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q8TAC9-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q8TAC9-F1-predicted_aligned_error_v6.png","plddt_mean":86.38},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=SCAMP5","jax_strain_url":"https://www.jax.org/strain/search?query=SCAMP5"},"sequence":{"accession":"Q8TAC9","fasta_url":"https://rest.uniprot.org/uniprotkb/Q8TAC9.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q8TAC9/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q8TAC9"}},"corpus_meta":[{"pmid":"20071347","id":"PMC_20071347","title":"SCAMP5, NBEA and AMISYN: three candidate genes for autism involved in secretion of large dense-core vesicles.","date":"2010","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/20071347","citation_count":79,"is_preprint":false},{"pmid":"19240033","id":"PMC_19240033","title":"SCAMP5 links endoplasmic reticulum stress to the accumulation of expanded polyglutamine protein aggregates via endocytosis inhibition.","date":"2009","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/19240033","citation_count":47,"is_preprint":false},{"pmid":"19234194","id":"PMC_19234194","title":"Human SCAMP5, a novel secretory carrier membrane protein, facilitates calcium-triggered cytokine secretion by interaction with SNARE machinery.","date":"2009","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/19234194","citation_count":43,"is_preprint":false},{"pmid":"25057210","id":"PMC_25057210","title":"SCAMP5 plays a critical role in synaptic vesicle endocytosis during high neuronal activity.","date":"2014","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/25057210","citation_count":36,"is_preprint":false},{"pmid":"29562188","id":"PMC_29562188","title":"Impairment of Release Site Clearance within the Active Zone by Reduced SCAMP5 Expression Causes Short-Term Depression of Synaptic Release.","date":"2018","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/29562188","citation_count":20,"is_preprint":false},{"pmid":"32020363","id":"PMC_32020363","title":"Deficiency of SCAMP5 leads to pediatric epilepsy and dysregulation of neurotransmitter release in the brain.","date":"2020","source":"Human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/32020363","citation_count":17,"is_preprint":false},{"pmid":"31439720","id":"PMC_31439720","title":"De novo SCAMP5 mutation causes a neurodevelopmental disorder with autistic features and seizures.","date":"2019","source":"Journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/31439720","citation_count":16,"is_preprint":false},{"pmid":"33372133","id":"PMC_33372133","title":"SCAMP5 plays a critical role in axonal trafficking and synaptic localization of NHE6 to adjust quantal size at glutamatergic synapses.","date":"2021","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/33372133","citation_count":16,"is_preprint":false},{"pmid":"33663553","id":"PMC_33663553","title":"SCAMP5 mediates activity-dependent enhancement of NHE6 recruitment to synaptic vesicles during synaptic plasticity.","date":"2021","source":"Molecular brain","url":"https://pubmed.ncbi.nlm.nih.gov/33663553","citation_count":9,"is_preprint":false},{"pmid":"36217917","id":"PMC_36217917","title":"The role of SCAMP5 in central nervous system diseases.","date":"2022","source":"Neurological research","url":"https://pubmed.ncbi.nlm.nih.gov/36217917","citation_count":5,"is_preprint":false},{"pmid":"33390987","id":"PMC_33390987","title":"Identification of an Identical de Novo SCAMP5 Missense Variant in Four Unrelated Patients With Seizures and Severe Neurodevelopmental Delay.","date":"2020","source":"Frontiers in pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/33390987","citation_count":4,"is_preprint":false},{"pmid":"40953307","id":"PMC_40953307","title":"Deficiency of SCAMP5 Triggers Pancreatic β-Cell Secretory Dysfunction and Apoptosis.","date":"2025","source":"Advanced science (Weinheim, Baden-Wurttemberg, Germany)","url":"https://pubmed.ncbi.nlm.nih.gov/40953307","citation_count":2,"is_preprint":false},{"pmid":"34728555","id":"PMC_34728555","title":"Investigations into SCAMP5, a candidate lupus risk gene expressed in plasmacytoid dendritic cells.","date":"2021","source":"Lupus science & medicine","url":"https://pubmed.ncbi.nlm.nih.gov/34728555","citation_count":2,"is_preprint":false},{"pmid":"35296555","id":"PMC_35296555","title":"Activation-induced colocalisation of SCAMP5 with IFNα in human plasmacytoid dendritic cells.","date":"2022","source":"Lupus science & medicine","url":"https://pubmed.ncbi.nlm.nih.gov/35296555","citation_count":1,"is_preprint":false},{"pmid":"41186735","id":"PMC_41186735","title":"Deficiency of SCAMP5 causes Parkinson's disease due to loss of dopamine neurons.","date":"2025","source":"Human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/41186735","citation_count":0,"is_preprint":false},{"pmid":"40958389","id":"PMC_40958389","title":"SCAMP5 regulates AP-4-dependent sorting and trafficking of ATG9A for presynaptic autophagy via PI4KB/PI4KIIIβ recruitment and PtdInsP4 production at the TGN.","date":"2025","source":"Autophagy","url":"https://pubmed.ncbi.nlm.nih.gov/40958389","citation_count":0,"is_preprint":false},{"pmid":"40184123","id":"PMC_40184123","title":"Analyzing the clinical characteristics of the SCAMP5 gene in gliomas and establishing a predictive model.","date":"2025","source":"Medicine","url":"https://pubmed.ncbi.nlm.nih.gov/40184123","citation_count":0,"is_preprint":false},{"pmid":"40761243","id":"PMC_40761243","title":"Case Report: A novel t(15;17)(q24;q11.2) translocation involving NF1::SCAMP5 fusion in a patient with myeloproliferative neoplasms.","date":"2025","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/40761243","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.07.03.662988","title":"Secretory carrier membrane proteins assist with aquaporin trafficking in Arabidopsis","date":"2025-07-06","source":"bioRxiv","url":"https://doi.org/10.1101/2025.07.03.662988","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.05.06.651945","title":"Synaptic vesicles that store monoamines and glutamate differ in protein composition","date":"2025-05-07","source":"bioRxiv","url":"https://doi.org/10.1101/2025.05.06.651945","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":11094,"output_tokens":3528,"usd":0.043101},"stage2":{"model":"claude-opus-4-6","input_tokens":6946,"output_tokens":2931,"usd":0.162007},"total_usd":0.205108,"stage1_batch_id":"msgbatch_011rkcQdVV1RaFq9XhcG6df6","stage2_batch_id":"msgbatch_01RzgrJafdF4EWHhj5mNi6dh","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2010,\n      \"finding\": \"SCAMP5 functions as a negative regulator of large dense-core vesicle (LDCV) secretion; gene silencing of Scamp5 in mouse beta-TC3 cells resulted in a 2-fold increase in stimulated LDCV secretion, while overexpression suppressed secretion.\",\n      \"method\": \"Gene silencing (shRNA/siRNA) and overexpression in mouse beta-TC3 cells with functional secretion assay; ultrastructural analysis of dense-core granules in patient platelets\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — clean KD and OE with defined cellular phenotype, but single lab\",\n      \"pmids\": [\"20071347\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"SCAMP5 impairs endocytosis, and increased SCAMP5 expression (induced by ER stress) enhances accumulation of mutant huntingtin (mtHTT) aggregates via the endocytosis pathway; downregulation of SCAMP5 alleviates ER stress-induced mtHTT aggregation.\",\n      \"method\": \"Cell-based aggregation assays, ectopic expression and knockdown of SCAMP5 in cultured striatal neurons, stereotactic and intraperitoneal injection of tunicamycin in R6/2 and N171-82Q mice\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — KD and OE with defined cellular phenotype and in vivo validation, single lab\",\n      \"pmids\": [\"19240033\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"SCAMP5 localizes primarily to Golgi-associated compartments and translocates to the plasma membrane upon calcium ionophore (ionomycin) stimulation; SCAMP5 directly interacts with synaptotagmins via its cytosolic C-terminal tail, and complexes with SNARE molecules during this translocation, promoting calcium-regulated exocytosis of signal peptide-containing cytokines (CCL5).\",\n      \"method\": \"Subcellular fractionation, immunofluorescence confocal microscopy, membrane vesicle immunoisolation, Co-IP, cytokine secretion assays in human epithelial cancer cells, monocytes, and mouse macrophages\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (fractionation, imaging, Co-IP, functional assay) in single study\",\n      \"pmids\": [\"19234194\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SCAMP5 is critical for synaptic vesicle (SV) endocytosis specifically during high neuronal activity; SCAMP5 knockdown in rat hippocampal neurons reduced total and recycling pool size, slowed endocytosis after stimulation, and severely impaired it during strong stimulation, lowering the threshold at which endocytosis could not compensate for ongoing exocytosis.\",\n      \"method\": \"shRNA knockdown with shRNA-resistant rescue in cultured rat hippocampal neurons; optical imaging of SV recycling pools\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KD with rescue experiment and defined synaptic phenotype, moderate evidence\",\n      \"pmids\": [\"25057210\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"SCAMP5 plays a critical role in release site clearance at the active zone; the 2/3 loop domain of SCAMP5 directly interacts with adaptor protein 2 (AP2), and this interaction is required for efficient clearance of SV proteins from the active zone after exocytosis. SCAMP5 knockdown causes pronounced synaptic depression and frequency-dependent short-term depression.\",\n      \"method\": \"Truncation analysis for domain mapping, optical imaging, electrophysiology, super-resolution microscopy, knockdown in hippocampal neurons\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — domain truncation mapping of direct interaction + multiple functional readouts (electrophysiology, super-resolution imaging)\",\n      \"pmids\": [\"29562188\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"The SCAMP5 R91W mutation affects the interaction between SCAMP5 and synaptotagmin 1, disrupting SNARE complex function, and increases the frequency of miniature excitatory postsynaptic currents and amplitude of evoked EPSCs, shifting the excitation/inhibition balance in brain neuronal networks.\",\n      \"method\": \"Knock-in mouse model (R91W), single-neuron electrophysiological recordings, protein interaction analysis\",\n      \"journal\": \"Human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — knock-in mouse with defined electrophysiological phenotype and interaction disruption, single lab\",\n      \"pmids\": [\"32020363\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SCAMP5 directly interacts with the cation/H+ exchanger NHE6 via the 2/3 loop domain of SCAMP5 and the C-terminal region of NHE6; this interaction regulates axonal trafficking and presynaptic localization of NHE6. SCAMP5 KD inhibits NHE6 recruitment to presynaptic terminals, causing hyperacidification of SVs and reduction in glutamate quantal size. NHE6 knockout occluded the effect of SCAMP5 KD (genetic epistasis).\",\n      \"method\": \"Truncated construct protein-protein interaction analysis, shRNA knockdown, optical imaging, electrophysiological recording, genetic epistasis (NHE6 KO + SCAMP5 KD) in hippocampal neurons\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — domain mapping, epistasis, multiple functional readouts, single lab with strong orthogonal methods\",\n      \"pmids\": [\"33372133\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SCAMP5-dependent recruitment of NHE6 to synaptic vesicles is enhanced during chemical LTP (cLTP), with increased NHE6-positive presynaptic boutons; SCAMP5 knockdown completely abrogated this cLTP-induced enhancement of NHE6 recruitment, indicating a role for SCAMP5 in presynaptic plasticity.\",\n      \"method\": \"Chemical LTP induction, shRNA knockdown, optical imaging of NHE6-positive boutons in hippocampal neurons\",\n      \"journal\": \"Molecular brain\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — KD with defined plasticity phenotype, single lab, extends prior finding\",\n      \"pmids\": [\"33663553\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SCAMP5 localizes to the Golgi apparatus and dynamically traffics to the cell surface along the interferon secretory pathway in plasmacytoid dendritic cells (pDCs); lentiviral expression in HEK cells was used to confirm subcellular distribution alongside the IFN secretory pathway.\",\n      \"method\": \"Lentiviral overexpression, immunofluorescence, live-cell imaging for Golgi-cell surface trafficking in pDCs and transfected cells\",\n      \"journal\": \"Lupus science & medicine\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — localization by imaging with partial functional correlation, single lab\",\n      \"pmids\": [\"34728555\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"SCAMP5 colocalizes with IFNα in activated human plasmacytoid dendritic cells, supporting a role of SCAMP5 in type I IFN secretory trafficking.\",\n      \"method\": \"ImageStream technology measuring bright detail similarity (BDS) scores for SCAMP5/IFNα colocalization in freshly isolated human pDCs\",\n      \"journal\": \"Lupus science & medicine\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — colocalization only, no functional manipulation, single lab\",\n      \"pmids\": [\"35296555\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SCAMP5 deficiency in pancreatic β-cells reduces insulin secretion (involving reduced CaV1.2 expression) and triggers apoptosis; SCAMP5 interacts with VDAC1 and downregulates its protein expression, thereby repressing VDAC1-recruited Bax translocation to mitochondria and inhibiting cytochrome c release, preventing apoptosis. Hyperglycemia-activated ChREBP epigenetically represses SCAMP5 expression by reducing H3K4me3 at the Scamp5 promoter.\",\n      \"method\": \"Co-IP (SCAMP5-VDAC1 interaction), knockdown/overexpression in β-cell lines, ChIP for H3K4me3, functional apoptosis and secretion assays\",\n      \"journal\": \"Advanced science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — Co-IP, ChIP, and multiple functional assays in single study, single lab\",\n      \"pmids\": [\"40953307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SCAMP5 deficiency increases α-synuclein protein and oligomers in PC12 cells leading to increased apoptosis and decreased dopamine secretion; SCAMP5 knockdown in SH-SY5Y cells reduces α-synuclein secretion via exosomes; R91W mutant fails to rescue these effects; scamp5a knockout zebrafish show Parkinson's-like phenotypes including loss of dopamine neurons and upregulated JNK signaling.\",\n      \"method\": \"SCAMP5 knockdown in PC12 and SH-SY5Y cells, exosome isolation, α-synuclein quantification, scamp5a knockout zebrafish, transcriptome analysis\",\n      \"journal\": \"Human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — KD/KO with defined molecular and cellular phenotypes across cell lines and in vivo model, single lab\",\n      \"pmids\": [\"41186735\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SCAMP5 acts as a novel binding partner of PI4KB (PI4KIIIβ), controlling its recruitment to the TGN and subsequent PtdIns4P production; since PtdIns4P is required for AP-4 recruitment, SCAMP5 depletion disrupts AP-4-mediated ATG9A trafficking to presynaptic sites, impairing presynaptic autophagosome formation and protein turnover.\",\n      \"method\": \"Co-IP (SCAMP5-PI4KB), SCAMP5 knockdown, fluorescence imaging of ATG9A trafficking and autophagosome formation at presynaptic boutons in hippocampal neurons\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — Co-IP identifying novel binding partner, KD with defined trafficking and autophagy phenotype, mechanistic pathway established\",\n      \"pmids\": [\"40958389\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SCAMP5 selectively regulates recycling of VGLUT2-containing synaptic vesicles but not VMAT2-containing monoaminergic SVs; loss of differentially expressed SCAMP5 impairs VGLUT2 SV recycling in neurons expressing both vesicle types.\",\n      \"method\": \"CRISPR knock-in mouse (HA-VMAT2) for SV immunoisolation, proteomics, loss-of-function analysis in primary neurons comparing VGLUT2 vs VMAT2 SV recycling\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — functional loss-of-function with SV-type-specific recycling phenotype; preprint, not yet peer reviewed\",\n      \"pmids\": [\"bio_10.1101_2025.05.06.651945\"],\n      \"is_preprint\": true\n    }\n  ],\n  \"current_model\": \"SCAMP5 is a brain-enriched synaptic vesicle membrane protein that functions at multiple steps of vesicular trafficking: it promotes synaptic vesicle endocytosis (especially under high activity), facilitates active-zone release site clearance via direct interaction of its 2/3 loop domain with AP2, recruits NHE6 to glutamatergic presynaptic terminals (regulating quantal size), orchestrates presynaptic autophagy by binding PI4KB at the TGN to drive PtdIns4P-dependent AP-4-mediated ATG9A trafficking, interacts with synaptotagmin and SNARE machinery to regulate calcium-triggered exocytosis, and interacts with VDAC1 to suppress apoptosis in secretory cells—with its dysfunction linked to autism, epilepsy, Parkinson's disease, and diabetes.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"SCAMP5 is a brain-enriched vesicle membrane protein that orchestrates multiple steps of synaptic vesicle cycling, secretory trafficking, and presynaptic homeostasis. It promotes synaptic vesicle endocytosis during high neuronal activity and facilitates active-zone release site clearance through direct interaction of its 2/3 loop domain with AP-2, while also recruiting the cation/H⁺ exchanger NHE6 to glutamatergic presynaptic terminals to regulate vesicle luminal pH and glutamate quantal size [PMID:25057210, PMID:29562188, PMID:33372133]. SCAMP5 binds PI4KB at the trans-Golgi network to drive PtdIns4P-dependent AP-4-mediated ATG9A trafficking, thereby controlling presynaptic autophagosome biogenesis, and interacts with synaptotagmin-1 and SNARE machinery to regulate calcium-triggered exocytosis—functions disrupted by the autism/epilepsy-associated R91W mutation [PMID:40958389, PMID:19234194, PMID:32020363]. In pancreatic β-cells, SCAMP5 interacts with VDAC1 to suppress Bax-dependent apoptosis and supports insulin secretion, with its expression epigenetically repressed by hyperglycemia-activated ChREBP [PMID:40953307].\",\n  \"teleology\": [\n    {\n      \"year\": 2009,\n      \"claim\": \"Establishing SCAMP5 as a participant in calcium-regulated exocytosis resolved its role beyond generic vesicle trafficking, showing it bridges Golgi-derived compartments to the plasma membrane through interactions with synaptotagmins and SNARE complexes.\",\n      \"evidence\": \"Subcellular fractionation, Co-IP, confocal imaging, and cytokine secretion assays in human epithelial cells, monocytes, and macrophages\",\n      \"pmids\": [\"19234194\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether SCAMP5-synaptotagmin interaction is direct or scaffold-mediated was not fully resolved\",\n        \"The specific SNARE partners in the complex were not individually identified\",\n        \"Relevance to neuronal synaptic vesicle exocytosis was not tested\"\n      ]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Demonstrating that ER stress-induced SCAMP5 upregulation impairs endocytosis and promotes mutant huntingtin aggregation revealed SCAMP5 as a modulator of endocytic flux with disease relevance.\",\n      \"evidence\": \"SCAMP5 overexpression and knockdown in striatal neurons; in vivo tunicamycin injection in Huntington's disease mouse models\",\n      \"pmids\": [\"19240033\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Mechanism by which SCAMP5 impairs endocytosis was not defined\",\n        \"Whether the endocytic impairment is direct or secondary to ER stress signaling remains unclear\"\n      ]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Identifying SCAMP5 as a negative regulator of large dense-core vesicle secretion in β-cells extended its function beyond constitutive trafficking to regulated secretion in endocrine cells.\",\n      \"evidence\": \"shRNA knockdown and overexpression in beta-TC3 cells with stimulated secretion assays\",\n      \"pmids\": [\"20071347\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"The molecular mechanism of secretion suppression was not identified\",\n        \"Whether the effect is specific to LDCVs or extends to other vesicle types in β-cells was untested\"\n      ]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Demonstrating that SCAMP5 is selectively required for synaptic vesicle endocytosis during intense neuronal activity established its activity-dependent role at the presynaptic terminal.\",\n      \"evidence\": \"shRNA knockdown with rescue in cultured rat hippocampal neurons; optical imaging of SV recycling pools\",\n      \"pmids\": [\"25057210\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"The endocytic adaptor or coat machinery engaged by SCAMP5 was not identified\",\n        \"Whether SCAMP5 acts in clathrin-mediated versus bulk endocytosis was unclear\"\n      ]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Mapping the 2/3 loop domain of SCAMP5 as the site of direct AP-2 interaction and showing its requirement for active-zone release site clearance resolved the molecular basis for its endocytic function and explained the synaptic depression phenotype.\",\n      \"evidence\": \"Domain truncation mapping, super-resolution microscopy, electrophysiology, knockdown in hippocampal neurons\",\n      \"pmids\": [\"29562188\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether SCAMP5-AP2 interaction recruits clathrin or other coat proteins was not determined\",\n        \"Structural basis of the 2/3 loop–AP2 interaction is unknown\"\n      ]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"The R91W knock-in mouse showed that a disease-associated SCAMP5 mutation disrupts synaptotagmin-1 interaction and shifts excitation/inhibition balance, providing a mechanistic link from molecular interaction to circuit-level dysfunction relevant to autism and epilepsy.\",\n      \"evidence\": \"Knock-in mouse model, single-neuron electrophysiology, protein interaction analysis\",\n      \"pmids\": [\"32020363\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Whether the R91W mutation also affects the AP-2 or NHE6 interactions was not tested\",\n        \"Behavioral phenotyping of R91W mice was limited\"\n      ]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Identifying the SCAMP5–NHE6 interaction via the 2/3 loop domain and demonstrating genetic epistasis with NHE6 KO established SCAMP5 as the trafficking receptor that recruits NHE6 to presynaptic terminals, controlling vesicle pH and glutamate quantal size.\",\n      \"evidence\": \"Domain mapping, shRNA knockdown, NHE6 KO epistasis, electrophysiology and optical imaging in hippocampal neurons\",\n      \"pmids\": [\"33372133\", \"33663553\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether SCAMP5 simultaneously binds AP-2 and NHE6 or these are mutually exclusive interactions is unknown\",\n        \"Whether NHE6 recruitment by SCAMP5 occurs at the Golgi, endosome, or plasma membrane was not resolved\"\n      ]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Discovery that SCAMP5 binds PI4KB to control TGN PtdIns4P levels, AP-4 recruitment, and ATG9A trafficking to presynaptic sites established SCAMP5 as a key organizer of presynaptic autophagy, a previously unrecognized function.\",\n      \"evidence\": \"Co-IP for SCAMP5-PI4KB interaction, knockdown with fluorescence imaging of ATG9A trafficking and autophagosome formation in hippocampal neurons\",\n      \"pmids\": [\"40958389\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Whether the PI4KB interaction uses the same 2/3 loop domain as AP-2 and NHE6 interactions is unknown\",\n        \"Whether presynaptic autophagy deficits contribute to neurodegeneration in SCAMP5 mutant models was not tested\"\n      ]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Identifying the SCAMP5–VDAC1 interaction in β-cells and showing that SCAMP5 loss triggers Bax-mediated apoptosis revealed a non-neuronal cytoprotective function, while ChREBP-mediated epigenetic silencing under hyperglycemia provided a disease-relevant regulatory mechanism.\",\n      \"evidence\": \"Co-IP, knockdown/overexpression in β-cell lines, ChIP for H3K4me3 at Scamp5 promoter, apoptosis and secretion assays\",\n      \"pmids\": [\"40953307\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Whether SCAMP5 directly downregulates VDAC1 protein or acts through an intermediate is unclear\",\n        \"In vivo β-cell-specific SCAMP5 knockout has not been reported\"\n      ]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Linking SCAMP5 deficiency to α-synuclein accumulation, impaired exosomal secretion, and dopamine neuron loss in zebrafish connected SCAMP5 dysfunction to Parkinson's disease-like pathology.\",\n      \"evidence\": \"Knockdown in PC12 and SH-SY5Y cells, exosome isolation, scamp5a knockout zebrafish with transcriptome analysis\",\n      \"pmids\": [\"41186735\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Whether α-synuclein accumulation is due to impaired secretion, impaired autophagy, or both was not disambiguated\",\n        \"Mammalian in vivo validation of the Parkinson's-like phenotype is lacking\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"It remains unknown how SCAMP5 coordinates its multiple binding partners (AP-2, NHE6, PI4KB, synaptotagmin-1, VDAC1) — whether interactions are mutually exclusive, compartment-specific, or regulated by post-translational modifications — and no structural model of any SCAMP5 complex exists.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"No high-resolution structure of SCAMP5 or any SCAMP5-partner complex\",\n        \"Post-translational modifications that might switch between interaction partners are uncharacterized\",\n        \"Conditional knockout mouse models for SCAMP5 in brain have not been reported\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [4, 6, 12]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [0, 3, 10]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005794\", \"supporting_discovery_ids\": [2, 8, 12]},\n      {\"term_id\": \"GO:0031410\", \"supporting_discovery_ids\": [2, 3, 4]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [2, 8]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [2, 3, 4, 6]},\n      {\"term_id\": \"R-HSA-112316\", \"supporting_discovery_ids\": [3, 4, 5, 6]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [12]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"SYT1\",\n      \"AP2\",\n      \"NHE6\",\n      \"PI4KB\",\n      \"VDAC1\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}