{"gene":"SCAMP5","run_date":"2026-06-10T07:46:29","timeline":{"discoveries":[{"year":2009,"finding":"hSCAMP5 localizes primarily to Golgi-associated compartments and translocates to the plasma membrane upon calcium ionophore stimulation; it co-distributes and complexes with SNARE molecules during this translocation and directly interacts with synaptotagmins via its cytosolic C-terminal tail, thereby linking SCAMP5 to calcium-regulated exocytosis of signal peptide-containing cytokines (CCL5).","method":"Subcellular fractionation, immunofluorescence confocal microscopy, membrane vesicle immunoisolation, co-immunoprecipitation, truncation/domain interaction analysis","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (fractionation, co-IP, immunofluorescence) in a single lab study; no independent replication reported","pmids":["19234194"],"is_preprint":false},{"year":2009,"finding":"SCAMP5 impairs endocytosis when overexpressed, which in turn enhances mutant huntingtin (mtHTT) aggregation; conversely, SCAMP5 knockdown alleviates ER stress-induced mtHTT aggregation and endocytosis inhibition, establishing SCAMP5 as a regulator of polyglutamine protein accumulation via the endocytosis pathway.","method":"Cell-based aggregation assays, ectopic expression, RNAi knockdown, endocytosis assays, in vivo stereotactic and intraperitoneal tunicamycin injection in R6/2 and N171-82Q mouse models","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (overexpression, KD, in vivo mouse models) in a single lab; no independent replication","pmids":["19240033"],"is_preprint":false},{"year":2010,"finding":"Gene silencing of Scamp5 in mouse beta-TC3 cells results in a 2-fold increase in stimulated secretion of large dense-core vesicles (LDCVs), while overexpression suppresses LDCV secretion, identifying SCAMP5 as a negative regulator of LDCV exocytosis.","method":"shRNA-mediated gene silencing, overexpression, LDCV secretion assay in mouse beta-TC3 cells, ultrastructural analysis of blood platelets","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — bidirectional manipulation (KD and OE) with specific secretion readout in a single lab study","pmids":["20071347"],"is_preprint":false},{"year":2014,"finding":"Knockdown of SCAMP5 in rat hippocampal neurons reduces total and recycling synaptic vesicle pool sizes, slows endocytosis after stimulation, and severely impairs endocytosis during strong stimulation, lowering the threshold at which SV endocytosis cannot compensate for exocytosis; these defects are rescued by shRNA-resistant SCAMP5.","method":"shRNA knockdown in cultured rat hippocampal neurons, optical imaging of SV pool dynamics, rescue with shRNA-resistant construct","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — bidirectional manipulation with rescue, multiple orthogonal readouts (pool sizes, endocytosis kinetics), replicated functionally across stimulation conditions","pmids":["25057210"],"is_preprint":false},{"year":2018,"finding":"The 2/3 loop domain of SCAMP5 directly interacts with adaptor protein 2 (AP2), and this interaction is critical for release site clearance at the active zone; SCAMP5 knockdown causes pronounced synaptic depression, slower SV pool recovery, frequency-dependent short-term depression, and defects in SV protein clearance at the active zone.","method":"Truncation analysis for protein-protein interaction, optical imaging, electrophysiology, super-resolution microscopy, shRNA knockdown","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct domain-interaction mapping, multiple orthogonal methods (electrophysiology, optical imaging, super-resolution microscopy), clear mechanistic assignment","pmids":["29562188"],"is_preprint":false},{"year":2019,"finding":"A de novo missense variant (p.Gly180Trp) in SCAMP5 markedly reduces mutant protein levels in Drosophila fat body (indicating reduced expression or increased turnover) and causes dominant-negative effects on neuronal and eye phenotypes comparable to SCAMP RNAi, establishing this residue as functionally critical.","method":"Western blot of overexpressed proteins in Drosophila fat body, RNAi comparison, in vivo fly phenotypic analysis","journal":"Journal of medical genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo functional validation in Drosophila model with orthogonal methods, single lab, no mammalian reconstitution","pmids":["31439720"],"is_preprint":false},{"year":2020,"finding":"The SCAMP5 R91W mutation in a consanguineous family with epilepsy increases mEPSC frequency and evoked EPSC amplitude in single-neuron recordings, and disrupts the interaction between SCAMP5 and synaptotagmin 1, implicating SCAMP5 in regulation of the SNARE complex and neurotransmitter release balance.","method":"Knock-in mouse model (R91W), single-neuron electrophysiological recording (mEPSC, evoked EPSC), protein interaction analysis","journal":"Human genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — knock-in mouse with electrophysiology and interaction assay, single lab, mechanistic specificity moderate","pmids":["32020363"],"is_preprint":false},{"year":2021,"finding":"SCAMP5 directly interacts with the cation/H+ exchanger NHE6 via its 2/3 loop domain (binding the C-terminal region of NHE6), and this interaction is required for axonal trafficking and presynaptic localization of NHE6; SCAMP5 knockdown or disruption of this interaction causes hyperacidification of SVs and reduces glutamate quantal size, while NHE6 knockout occludes the SCAMP5 KD effect.","method":"Truncation-based protein-protein interaction analysis, shRNA knockdown, optical imaging, electrophysiological recording, genetic epistasis (NHE6 KO occlusion experiment)","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — domain mapping, genetic epistasis, multiple orthogonal readouts (trafficking, pH, quantal size), single lab with rigorous controls","pmids":["33372133"],"is_preprint":false},{"year":2021,"finding":"SCAMP5-dependent recruitment of NHE6 to synaptic vesicles is further enhanced during chemical LTP (cLTP), with SCAMP5 knockdown completely abrogating the cLTP-induced increase in NHE6-positive presynaptic boutons, demonstrating that SCAMP5 regulates NHE6 recruitment during synaptic plasticity as well as at rest.","method":"Chemical LTP induction, shRNA knockdown, optical imaging of NHE6-positive presynaptic boutons","journal":"Molecular brain","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — extends prior mechanistic findings with a defined plasticity paradigm, single lab, single primary method","pmids":["33663553"],"is_preprint":false},{"year":2021,"finding":"SCAMP5 localizes to the Golgi apparatus with dynamic Golgi-cell surface trafficking in plasmacytoid dendritic cells (pDCs), colocalizing with the interferon secretory pathway in transfected HEK cells.","method":"Lentiviral expression, subcellular localization imaging, colocalization analysis","journal":"Lupus science & medicine","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single imaging method, no functional manipulation confirming mechanistic role in IFN secretion","pmids":["34728555"],"is_preprint":false},{"year":2022,"finding":"In activated human pDCs, SCAMP5 colocalizes with IFNα as measured by ImageStream technology, supporting a role for SCAMP5 in type I interferon secretory trafficking.","method":"Flow cytometry, ImageStream colocalization (bright detail similarity scoring)","journal":"Lupus science & medicine","confidence":"Low","confidence_rationale":"Tier 3 / Weak — colocalization only, no functional manipulation, single small cohort study","pmids":["35296555"],"is_preprint":false},{"year":2025,"finding":"SCAMP5 deficiency in β-cells reduces CaV1.2 expression and insulin secretion; SCAMP5 directly interacts with VDAC1 and downregulates its protein expression, thereby preventing VDAC1-mediated Bax recruitment to mitochondria and consequent cytochrome c release, thus inhibiting apoptosis. ChREBP activated by hyperglycemia epigenetically represses SCAMP5 expression by reducing H3K4me3 at the Scamp5 promoter.","method":"Co-immunoprecipitation (SCAMP5-VDAC1 interaction), knockdown/overexpression in β-cells, cytochrome c release assay, Bax mitochondrial localization, ChIP for H3K4me3, CaV1.2 expression analysis","journal":"Advanced science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (co-IP, ChIP, functional rescue) in single lab; mechanistic chain is detailed but not independently replicated","pmids":["40953307"],"is_preprint":false},{"year":2025,"finding":"SCAMP5 deficiency increases α-synuclein protein levels and oligomers, reduces α-synuclein secretion via exosomes, and decreases dopamine secretion in PC12/SH-SY5Y cells; R91W mutant SCAMP5 fails to rescue these effects; scamp5a knockout zebrafish exhibit bradykinesia, loss of dopamine neurons, reduced brain dopamine, and upregulated JNK signaling contributing to neuronal apoptosis.","method":"PC12/SH-SY5Y cell knockdown/overexpression, exosome isolation, dopamine measurement, zebrafish knockout model, transcriptome analysis, rescue with human wild-type vs. R91W SCAMP5","journal":"Human genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple model systems (cell lines and zebrafish), mutant rescue, functional readouts; single lab without independent replication","pmids":["41186735"],"is_preprint":false},{"year":2025,"finding":"SCAMP5 is a novel binding partner of PI4KB/PI4KIIIβ at the trans-Golgi network (TGN); SCAMP5 controls PI4KB recruitment to the TGN and subsequent PtdIns4P production, which is required for AP-4 recruitment and AP-4-mediated ATG9A trafficking to presynaptic sites; SCAMP5 depletion therefore impairs presynaptic autophagosome formation and protein turnover.","method":"Protein-protein interaction analysis (SCAMP5-PI4KB binding), shRNA depletion, lipid (PtdIns4P) production assay, AP-4 and ATG9A localization imaging, presynaptic autophagy assays","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct binding identification, lipid production assay, and functional autophagy readout in a single lab; novel pathway, not yet independently replicated","pmids":["40958389"],"is_preprint":false},{"year":2025,"finding":"Loss of SCAMP5 selectively impairs recycling of VGLUT2-containing synaptic vesicles but not VMAT2-containing monoamine vesicles in the same neuronal population, revealing a cargo-specific role for SCAMP5 in SV recycling.","method":"CRISPR knock-in mouse (HA-VMAT2) for SV immunoisolation, SCAMP5 loss-of-function, functional recycling analysis in primary neurons","journal":"bioRxiv","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct functional analysis with defined genetic tools and cargo-specific readout; 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 as a multifaceted regulator of vesicular trafficking: it promotes synaptic vesicle endocytosis during high neuronal activity (via AP2 interaction and release site clearance), controls axonal trafficking and presynaptic localization of the cation/H+ exchanger NHE6 (through its 2/3 loop domain) to set glutamate quantal size, orchestrates presynaptic autophagy by recruiting PI4KB to the TGN to generate PtdIns4P required for AP-4-dependent ATG9A sorting, interacts with synaptotagmin and SNARE machinery to regulate calcium-triggered exocytosis, and in non-neuronal contexts inhibits apoptosis by suppressing VDAC1-mediated Bax/cytochrome c signaling; loss-of-function mutations disrupt excitation/inhibition balance and underlie epilepsy, autism, and Parkinson's disease phenotypes."},"narrative":{"mechanistic_narrative":"SCAMP5 is a brain-enriched secretory membrane protein that regulates activity-dependent synaptic vesicle (SV) trafficking and cargo-specific recycling at presynaptic terminals [PMID:25057210, PMID:29562188]. During strong neuronal activity it sustains SV endocytosis: its knockdown reduces total and recycling SV pool sizes, slows post-stimulation endocytosis, and lowers the threshold at which endocytosis can no longer compensate for exocytosis [PMID:25057210]. Mechanistically, its 2/3 loop domain binds adaptor protein 2 (AP2) to drive release-site clearance at the active zone, such that loss of SCAMP5 produces synaptic depression and impaired SV protein clearance [PMID:29562188]. The same 2/3 loop domain binds the cation/H+ exchanger NHE6 and is required for NHE6 axonal trafficking and presynaptic localization, thereby controlling SV acidification and setting glutamate quantal size, with NHE6 recruitment further enhanced during chemical LTP [PMID:33372133, PMID:33663553]. SCAMP5 also organizes presynaptic autophagy by binding PI4KB at the trans-Golgi network to drive PtdIns4P production needed for AP-4-mediated ATG9A trafficking [PMID:40958389], and it links to calcium-regulated exocytosis through direct interaction with synaptotagmins and association with SNARE machinery [PMID:19234194, PMID:32020363]. Loss-of-function and missense variants (R91W, G180W) disrupt these functions and underlie epilepsy and Parkinson's disease phenotypes, the latter via elevated α-synuclein and dopamine-neuron loss [PMID:31439720, PMID:32020363, PMID:41186735]. In non-neuronal β-cells, SCAMP5 binds and downregulates VDAC1 to suppress Bax-dependent cytochrome c release and apoptosis [PMID:40953307].","teleology":[{"year":2009,"claim":"Established SCAMP5 as a Golgi-resident, calcium-responsive secretory protein physically coupled to the exocytic machinery, defining its molecular context before any synaptic role was known.","evidence":"Subcellular fractionation, co-IP, and domain-truncation interaction mapping in cytokine-secreting cells","pmids":["19234194"],"confidence":"Medium","gaps":["Direct synaptotagmin/SNARE binding shown by co-IP without reciprocal structural validation","Did not establish a presynaptic function"]},{"year":2009,"claim":"Linked SCAMP5 to endocytic control by showing its overexpression impairs endocytosis and aggravates polyglutamine aggregation, the first connection between SCAMP5 dosage and protein-handling disease.","evidence":"Overexpression, RNAi, and endocytosis assays plus in vivo tunicamycin in R6/2 and N171-82Q mouse models","pmids":["19240033"],"confidence":"Medium","gaps":["Mechanism connecting SCAMP5 to endocytic machinery not defined here","Effect may be dosage artifact of overexpression"]},{"year":2010,"claim":"Showed SCAMP5 acts as a negative regulator of large dense-core vesicle exocytosis, indicating it tunes secretory output bidirectionally depending on vesicle class.","evidence":"shRNA silencing and overexpression with LDCV secretion assays in beta-TC3 cells","pmids":["20071347"],"confidence":"Medium","gaps":["Molecular target of LDCV inhibition unidentified","Relationship to later SV-recycling role unresolved"]},{"year":2014,"claim":"Defined SCAMP5 as required for synaptic vesicle endocytosis specifically under high activity, resolving when SCAMP5 becomes rate-limiting at the synapse.","evidence":"shRNA knockdown with rescue and optical imaging of SV pool dynamics in rat hippocampal neurons","pmids":["25057210"],"confidence":"High","gaps":["Did not identify the molecular interaction mediating endocytosis","Site of action at active zone not yet localized"]},{"year":2018,"claim":"Identified the AP2-binding 2/3 loop as the mechanistic basis for SCAMP5-driven release-site clearance, explaining the activity-dependent endocytic defect.","evidence":"Truncation interaction mapping, electrophysiology, super-resolution microscopy, and shRNA in neurons","pmids":["29562188"],"confidence":"High","gaps":["Structural details of the SCAMP5-AP2 interface unknown","How clearance couples to subsequent vesicle reformation unresolved"]},{"year":2019,"claim":"Demonstrated a disease variant (G180W) reduces protein stability and acts dominant-negatively in vivo, validating SCAMP5 mutations as functionally consequential.","evidence":"Western blot and RNAi comparison with phenotypic analysis in Drosophila","pmids":["31439720"],"confidence":"Medium","gaps":["No mammalian reconstitution of the variant","Molecular pathway disrupted by the residue not mapped"]},{"year":2020,"claim":"Connected the human R91W epilepsy mutation to excitatory transmission imbalance and loss of synaptotagmin-1 binding, tying SCAMP5 to SNARE-dependent release control.","evidence":"R91W knock-in mouse, single-neuron mEPSC/EPSC recordings, and interaction assays","pmids":["32020363"],"confidence":"Medium","gaps":["Causal chain from lost synaptotagmin binding to hyperexcitability not fully resolved","Inhibitory synapse effects not characterized"]},{"year":2021,"claim":"Revealed that the 2/3 loop also binds NHE6 to traffic it to presynaptic SVs, establishing SCAMP5 as a controller of SV pH and glutamate quantal size, including during LTP.","evidence":"Truncation mapping, NHE6-KO epistasis, optical imaging, and electrophysiology plus chemical LTP induction","pmids":["33372133","33663553"],"confidence":"High","gaps":["How a single loop coordinates both AP2 and NHE6 binding unresolved","Quantitative link between SV acidification and quantal size incomplete"]},{"year":2025,"claim":"Placed SCAMP5 upstream of presynaptic autophagy by identifying PI4KB binding at the TGN driving PtdIns4P-dependent AP-4/ATG9A trafficking, a distinct trafficking arm from its endocytic role.","evidence":"Binding analysis, shRNA depletion, PtdIns4P production assay, and ATG9A localization/autophagy assays","pmids":["40958389"],"confidence":"Medium","gaps":["Independent replication of the SCAMP5-PI4KB axis pending","Coordination with AP2/NHE6 functions of SCAMP5 unknown"]},{"year":2025,"claim":"Extended SCAMP5 function to non-neuronal apoptosis control via VDAC1 downregulation and to Parkinson's-relevant α-synuclein handling, broadening its mechanistic repertoire beyond the synapse.","evidence":"Co-IP, ChIP for H3K4me3, and rescue in beta-cells; exosome/dopamine assays in PC12/SH-SY5Y and scamp5a-KO zebrafish","pmids":["40953307","41186735"],"confidence":"Medium","gaps":["VDAC1 and α-synuclein arms not independently replicated","Whether these contexts share the synaptic trafficking mechanism unknown"]},{"year":2025,"claim":"Demonstrated cargo selectivity in SV recycling, showing SCAMP5 supports VGLUT2 but not VMAT2 vesicle recycling within the same neurons.","evidence":"CRISPR HA-VMAT2 knock-in mouse SV immunoisolation with SCAMP5 loss-of-function recycling analysis (preprint)","pmids":["bio_10.1101_2025.05.06.651945"],"confidence":"Medium","gaps":["Preprint, not yet peer-reviewed","Molecular basis for cargo selectivity unidentified"]},{"year":null,"claim":"It remains unknown how a single small membrane protein coordinates its multiple binding modes (AP2, NHE6, synaptotagmin, PI4KB, VDAC1) and what determines which arm dominates in a given cell type or activity state.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of SCAMP5 in complex with any partner","No unifying regulatory logic across endocytic, autophagic, and apoptotic functions"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[4,7,13]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[2,11]}],"localization":[{"term_id":"GO:0005794","term_label":"Golgi apparatus","supporting_discovery_ids":[0,9,13]},{"term_id":"GO:0031410","term_label":"cytoplasmic vesicle","supporting_discovery_ids":[3,4,14]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[0]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[3,4,7]},{"term_id":"R-HSA-112316","term_label":"Neuronal System","supporting_discovery_ids":[3,4,7]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[13]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[11]}],"complexes":[],"partners":["AP2","NHE6","SYT1","PI4KB","VDAC1"],"other_free_text":[]}},"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":81,"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":21,"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":18,"is_preprint":false},{"pmid":"31439720","id":"PMC_31439720","title":"De novo SCAMP5 mutation causes a neurodevelopmental disorder with 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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":"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_2025.05.06.651945","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":11412,"output_tokens":3879,"usd":0.046211,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":11734,"output_tokens":3753,"usd":0.076247,"stage2_stop_reason":"end_turn"},"total_usd":0.122458,"stage1_batch_id":"msgbatch_013LWZZT6MWaqB9qyTSeQBmU","stage2_batch_id":"msgbatch_0194ZzQaTGNpruoNJBbEMbt3","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2009,\n      \"finding\": \"hSCAMP5 localizes primarily to Golgi-associated compartments and translocates to the plasma membrane upon calcium ionophore stimulation; it co-distributes and complexes with SNARE molecules during this translocation and directly interacts with synaptotagmins via its cytosolic C-terminal tail, thereby linking SCAMP5 to calcium-regulated exocytosis of signal peptide-containing cytokines (CCL5).\",\n      \"method\": \"Subcellular fractionation, immunofluorescence confocal microscopy, membrane vesicle immunoisolation, co-immunoprecipitation, truncation/domain interaction analysis\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (fractionation, co-IP, immunofluorescence) in a single lab study; no independent replication reported\",\n      \"pmids\": [\"19234194\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"SCAMP5 impairs endocytosis when overexpressed, which in turn enhances mutant huntingtin (mtHTT) aggregation; conversely, SCAMP5 knockdown alleviates ER stress-induced mtHTT aggregation and endocytosis inhibition, establishing SCAMP5 as a regulator of polyglutamine protein accumulation via the endocytosis pathway.\",\n      \"method\": \"Cell-based aggregation assays, ectopic expression, RNAi knockdown, endocytosis assays, in vivo stereotactic and intraperitoneal tunicamycin injection in R6/2 and N171-82Q mouse models\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (overexpression, KD, in vivo mouse models) in a single lab; no independent replication\",\n      \"pmids\": [\"19240033\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Gene silencing of Scamp5 in mouse beta-TC3 cells results in a 2-fold increase in stimulated secretion of large dense-core vesicles (LDCVs), while overexpression suppresses LDCV secretion, identifying SCAMP5 as a negative regulator of LDCV exocytosis.\",\n      \"method\": \"shRNA-mediated gene silencing, overexpression, LDCV secretion assay in mouse beta-TC3 cells, ultrastructural analysis of blood platelets\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — bidirectional manipulation (KD and OE) with specific secretion readout in a single lab study\",\n      \"pmids\": [\"20071347\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Knockdown of SCAMP5 in rat hippocampal neurons reduces total and recycling synaptic vesicle pool sizes, slows endocytosis after stimulation, and severely impairs endocytosis during strong stimulation, lowering the threshold at which SV endocytosis cannot compensate for exocytosis; these defects are rescued by shRNA-resistant SCAMP5.\",\n      \"method\": \"shRNA knockdown in cultured rat hippocampal neurons, optical imaging of SV pool dynamics, rescue with shRNA-resistant construct\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — bidirectional manipulation with rescue, multiple orthogonal readouts (pool sizes, endocytosis kinetics), replicated functionally across stimulation conditions\",\n      \"pmids\": [\"25057210\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"The 2/3 loop domain of SCAMP5 directly interacts with adaptor protein 2 (AP2), and this interaction is critical for release site clearance at the active zone; SCAMP5 knockdown causes pronounced synaptic depression, slower SV pool recovery, frequency-dependent short-term depression, and defects in SV protein clearance at the active zone.\",\n      \"method\": \"Truncation analysis for protein-protein interaction, optical imaging, electrophysiology, super-resolution microscopy, shRNA knockdown\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct domain-interaction mapping, multiple orthogonal methods (electrophysiology, optical imaging, super-resolution microscopy), clear mechanistic assignment\",\n      \"pmids\": [\"29562188\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"A de novo missense variant (p.Gly180Trp) in SCAMP5 markedly reduces mutant protein levels in Drosophila fat body (indicating reduced expression or increased turnover) and causes dominant-negative effects on neuronal and eye phenotypes comparable to SCAMP RNAi, establishing this residue as functionally critical.\",\n      \"method\": \"Western blot of overexpressed proteins in Drosophila fat body, RNAi comparison, in vivo fly phenotypic analysis\",\n      \"journal\": \"Journal of medical genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo functional validation in Drosophila model with orthogonal methods, single lab, no mammalian reconstitution\",\n      \"pmids\": [\"31439720\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"The SCAMP5 R91W mutation in a consanguineous family with epilepsy increases mEPSC frequency and evoked EPSC amplitude in single-neuron recordings, and disrupts the interaction between SCAMP5 and synaptotagmin 1, implicating SCAMP5 in regulation of the SNARE complex and neurotransmitter release balance.\",\n      \"method\": \"Knock-in mouse model (R91W), single-neuron electrophysiological recording (mEPSC, evoked EPSC), protein interaction analysis\",\n      \"journal\": \"Human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — knock-in mouse with electrophysiology and interaction assay, single lab, mechanistic specificity moderate\",\n      \"pmids\": [\"32020363\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SCAMP5 directly interacts with the cation/H+ exchanger NHE6 via its 2/3 loop domain (binding the C-terminal region of NHE6), and this interaction is required for axonal trafficking and presynaptic localization of NHE6; SCAMP5 knockdown or disruption of this interaction causes hyperacidification of SVs and reduces glutamate quantal size, while NHE6 knockout occludes the SCAMP5 KD effect.\",\n      \"method\": \"Truncation-based protein-protein interaction analysis, shRNA knockdown, optical imaging, electrophysiological recording, genetic epistasis (NHE6 KO occlusion experiment)\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — domain mapping, genetic epistasis, multiple orthogonal readouts (trafficking, pH, quantal size), single lab with rigorous controls\",\n      \"pmids\": [\"33372133\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SCAMP5-dependent recruitment of NHE6 to synaptic vesicles is further enhanced during chemical LTP (cLTP), with SCAMP5 knockdown completely abrogating the cLTP-induced increase in NHE6-positive presynaptic boutons, demonstrating that SCAMP5 regulates NHE6 recruitment during synaptic plasticity as well as at rest.\",\n      \"method\": \"Chemical LTP induction, shRNA knockdown, optical imaging of NHE6-positive presynaptic boutons\",\n      \"journal\": \"Molecular brain\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — extends prior mechanistic findings with a defined plasticity paradigm, single lab, single primary method\",\n      \"pmids\": [\"33663553\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SCAMP5 localizes to the Golgi apparatus with dynamic Golgi-cell surface trafficking in plasmacytoid dendritic cells (pDCs), colocalizing with the interferon secretory pathway in transfected HEK cells.\",\n      \"method\": \"Lentiviral expression, subcellular localization imaging, colocalization analysis\",\n      \"journal\": \"Lupus science & medicine\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single imaging method, no functional manipulation confirming mechanistic role in IFN secretion\",\n      \"pmids\": [\"34728555\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"In activated human pDCs, SCAMP5 colocalizes with IFNα as measured by ImageStream technology, supporting a role for SCAMP5 in type I interferon secretory trafficking.\",\n      \"method\": \"Flow cytometry, ImageStream colocalization (bright detail similarity scoring)\",\n      \"journal\": \"Lupus science & medicine\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — colocalization only, no functional manipulation, single small cohort study\",\n      \"pmids\": [\"35296555\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SCAMP5 deficiency in β-cells reduces CaV1.2 expression and insulin secretion; SCAMP5 directly interacts with VDAC1 and downregulates its protein expression, thereby preventing VDAC1-mediated Bax recruitment to mitochondria and consequent cytochrome c release, thus inhibiting apoptosis. ChREBP activated by hyperglycemia epigenetically represses SCAMP5 expression by reducing H3K4me3 at the Scamp5 promoter.\",\n      \"method\": \"Co-immunoprecipitation (SCAMP5-VDAC1 interaction), knockdown/overexpression in β-cells, cytochrome c release assay, Bax mitochondrial localization, ChIP for H3K4me3, CaV1.2 expression analysis\",\n      \"journal\": \"Advanced science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (co-IP, ChIP, functional rescue) in single lab; mechanistic chain is detailed but not independently replicated\",\n      \"pmids\": [\"40953307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SCAMP5 deficiency increases α-synuclein protein levels and oligomers, reduces α-synuclein secretion via exosomes, and decreases dopamine secretion in PC12/SH-SY5Y cells; R91W mutant SCAMP5 fails to rescue these effects; scamp5a knockout zebrafish exhibit bradykinesia, loss of dopamine neurons, reduced brain dopamine, and upregulated JNK signaling contributing to neuronal apoptosis.\",\n      \"method\": \"PC12/SH-SY5Y cell knockdown/overexpression, exosome isolation, dopamine measurement, zebrafish knockout model, transcriptome analysis, rescue with human wild-type vs. R91W SCAMP5\",\n      \"journal\": \"Human genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple model systems (cell lines and zebrafish), mutant rescue, functional readouts; single lab without independent replication\",\n      \"pmids\": [\"41186735\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SCAMP5 is a novel binding partner of PI4KB/PI4KIIIβ at the trans-Golgi network (TGN); SCAMP5 controls PI4KB recruitment to the TGN and subsequent PtdIns4P production, which is required for AP-4 recruitment and AP-4-mediated ATG9A trafficking to presynaptic sites; SCAMP5 depletion therefore impairs presynaptic autophagosome formation and protein turnover.\",\n      \"method\": \"Protein-protein interaction analysis (SCAMP5-PI4KB binding), shRNA depletion, lipid (PtdIns4P) production assay, AP-4 and ATG9A localization imaging, presynaptic autophagy assays\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct binding identification, lipid production assay, and functional autophagy readout in a single lab; novel pathway, not yet independently replicated\",\n      \"pmids\": [\"40958389\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Loss of SCAMP5 selectively impairs recycling of VGLUT2-containing synaptic vesicles but not VMAT2-containing monoamine vesicles in the same neuronal population, revealing a cargo-specific role for SCAMP5 in SV recycling.\",\n      \"method\": \"CRISPR knock-in mouse (HA-VMAT2) for SV immunoisolation, SCAMP5 loss-of-function, functional recycling analysis in primary neurons\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct functional analysis with defined genetic tools and cargo-specific readout; 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 as a multifaceted regulator of vesicular trafficking: it promotes synaptic vesicle endocytosis during high neuronal activity (via AP2 interaction and release site clearance), controls axonal trafficking and presynaptic localization of the cation/H+ exchanger NHE6 (through its 2/3 loop domain) to set glutamate quantal size, orchestrates presynaptic autophagy by recruiting PI4KB to the TGN to generate PtdIns4P required for AP-4-dependent ATG9A sorting, interacts with synaptotagmin and SNARE machinery to regulate calcium-triggered exocytosis, and in non-neuronal contexts inhibits apoptosis by suppressing VDAC1-mediated Bax/cytochrome c signaling; loss-of-function mutations disrupt excitation/inhibition balance and underlie epilepsy, autism, and Parkinson's disease phenotypes.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"SCAMP5 is a brain-enriched secretory membrane protein that regulates activity-dependent synaptic vesicle (SV) trafficking and cargo-specific recycling at presynaptic terminals [#3, #4]. During strong neuronal activity it sustains SV endocytosis: its knockdown reduces total and recycling SV pool sizes, slows post-stimulation endocytosis, and lowers the threshold at which endocytosis can no longer compensate for exocytosis [#3]. Mechanistically, its 2/3 loop domain binds adaptor protein 2 (AP2) to drive release-site clearance at the active zone, such that loss of SCAMP5 produces synaptic depression and impaired SV protein clearance [#4]. The same 2/3 loop domain binds the cation/H+ exchanger NHE6 and is required for NHE6 axonal trafficking and presynaptic localization, thereby controlling SV acidification and setting glutamate quantal size, with NHE6 recruitment further enhanced during chemical LTP [#7, #8]. SCAMP5 also organizes presynaptic autophagy by binding PI4KB at the trans-Golgi network to drive PtdIns4P production needed for AP-4-mediated ATG9A trafficking [#13], and it links to calcium-regulated exocytosis through direct interaction with synaptotagmins and association with SNARE machinery [#0, #6]. Loss-of-function and missense variants (R91W, G180W) disrupt these functions and underlie epilepsy and Parkinson's disease phenotypes, the latter via elevated \\u03b1-synuclein and dopamine-neuron loss [#5, #6, #12]. In non-neuronal \\u03b2-cells, SCAMP5 binds and downregulates VDAC1 to suppress Bax-dependent cytochrome c release and apoptosis [#11].\",\n  \"teleology\": [\n    {\n      \"year\": 2009,\n      \"claim\": \"Established SCAMP5 as a Golgi-resident, calcium-responsive secretory protein physically coupled to the exocytic machinery, defining its molecular context before any synaptic role was known.\",\n      \"evidence\": \"Subcellular fractionation, co-IP, and domain-truncation interaction mapping in cytokine-secreting cells\",\n      \"pmids\": [\"19234194\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct synaptotagmin/SNARE binding shown by co-IP without reciprocal structural validation\", \"Did not establish a presynaptic function\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Linked SCAMP5 to endocytic control by showing its overexpression impairs endocytosis and aggravates polyglutamine aggregation, the first connection between SCAMP5 dosage and protein-handling disease.\",\n      \"evidence\": \"Overexpression, RNAi, and endocytosis assays plus in vivo tunicamycin in R6/2 and N171-82Q mouse models\",\n      \"pmids\": [\"19240033\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism connecting SCAMP5 to endocytic machinery not defined here\", \"Effect may be dosage artifact of overexpression\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Showed SCAMP5 acts as a negative regulator of large dense-core vesicle exocytosis, indicating it tunes secretory output bidirectionally depending on vesicle class.\",\n      \"evidence\": \"shRNA silencing and overexpression with LDCV secretion assays in beta-TC3 cells\",\n      \"pmids\": [\"20071347\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular target of LDCV inhibition unidentified\", \"Relationship to later SV-recycling role unresolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Defined SCAMP5 as required for synaptic vesicle endocytosis specifically under high activity, resolving when SCAMP5 becomes rate-limiting at the synapse.\",\n      \"evidence\": \"shRNA knockdown with rescue and optical imaging of SV pool dynamics in rat hippocampal neurons\",\n      \"pmids\": [\"25057210\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not identify the molecular interaction mediating endocytosis\", \"Site of action at active zone not yet localized\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Identified the AP2-binding 2/3 loop as the mechanistic basis for SCAMP5-driven release-site clearance, explaining the activity-dependent endocytic defect.\",\n      \"evidence\": \"Truncation interaction mapping, electrophysiology, super-resolution microscopy, and shRNA in neurons\",\n      \"pmids\": [\"29562188\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural details of the SCAMP5-AP2 interface unknown\", \"How clearance couples to subsequent vesicle reformation unresolved\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Demonstrated a disease variant (G180W) reduces protein stability and acts dominant-negatively in vivo, validating SCAMP5 mutations as functionally consequential.\",\n      \"evidence\": \"Western blot and RNAi comparison with phenotypic analysis in Drosophila\",\n      \"pmids\": [\"31439720\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No mammalian reconstitution of the variant\", \"Molecular pathway disrupted by the residue not mapped\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Connected the human R91W epilepsy mutation to excitatory transmission imbalance and loss of synaptotagmin-1 binding, tying SCAMP5 to SNARE-dependent release control.\",\n      \"evidence\": \"R91W knock-in mouse, single-neuron mEPSC/EPSC recordings, and interaction assays\",\n      \"pmids\": [\"32020363\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Causal chain from lost synaptotagmin binding to hyperexcitability not fully resolved\", \"Inhibitory synapse effects not characterized\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Revealed that the 2/3 loop also binds NHE6 to traffic it to presynaptic SVs, establishing SCAMP5 as a controller of SV pH and glutamate quantal size, including during LTP.\",\n      \"evidence\": \"Truncation mapping, NHE6-KO epistasis, optical imaging, and electrophysiology plus chemical LTP induction\",\n      \"pmids\": [\"33372133\", \"33663553\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How a single loop coordinates both AP2 and NHE6 binding unresolved\", \"Quantitative link between SV acidification and quantal size incomplete\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Placed SCAMP5 upstream of presynaptic autophagy by identifying PI4KB binding at the TGN driving PtdIns4P-dependent AP-4/ATG9A trafficking, a distinct trafficking arm from its endocytic role.\",\n      \"evidence\": \"Binding analysis, shRNA depletion, PtdIns4P production assay, and ATG9A localization/autophagy assays\",\n      \"pmids\": [\"40958389\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Independent replication of the SCAMP5-PI4KB axis pending\", \"Coordination with AP2/NHE6 functions of SCAMP5 unknown\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Extended SCAMP5 function to non-neuronal apoptosis control via VDAC1 downregulation and to Parkinson's-relevant \\u03b1-synuclein handling, broadening its mechanistic repertoire beyond the synapse.\",\n      \"evidence\": \"Co-IP, ChIP for H3K4me3, and rescue in beta-cells; exosome/dopamine assays in PC12/SH-SY5Y and scamp5a-KO zebrafish\",\n      \"pmids\": [\"40953307\", \"41186735\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"VDAC1 and \\u03b1-synuclein arms not independently replicated\", \"Whether these contexts share the synaptic trafficking mechanism unknown\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Demonstrated cargo selectivity in SV recycling, showing SCAMP5 supports VGLUT2 but not VMAT2 vesicle recycling within the same neurons.\",\n      \"evidence\": \"CRISPR HA-VMAT2 knock-in mouse SV immunoisolation with SCAMP5 loss-of-function recycling analysis (preprint)\",\n      \"pmids\": [\"bio_10.1101_2025.05.06.651945\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Preprint, not yet peer-reviewed\", \"Molecular basis for cargo selectivity unidentified\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"It remains unknown how a single small membrane protein coordinates its multiple binding modes (AP2, NHE6, synaptotagmin, PI4KB, VDAC1) and what determines which arm dominates in a given cell type or activity state.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model of SCAMP5 in complex with any partner\", \"No unifying regulatory logic across endocytic, autophagic, and apoptotic functions\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [4, 7, 13]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [2, 11]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005794\", \"supporting_discovery_ids\": [0, 9, 13]},\n      {\"term_id\": \"GO:0031410\", \"supporting_discovery_ids\": [3, 4, 14]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [0]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [3, 4, 7]},\n      {\"term_id\": \"R-HSA-112316\", \"supporting_discovery_ids\": [3, 4, 7]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [13]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [11]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"AP2\", \"NHE6\", \"SYT1\", \"PI4KB\", \"VDAC1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}