{"gene":"EXOC5","run_date":"2026-04-28T17:46:03","timeline":{"discoveries":[{"year":1997,"finding":"Human SEC10 (hSec10p) was identified as the human homologue of yeast Sec10p, a component of the exocyst complex. Co-transfection and immunofluorescence showed that hSec10p and mammalian Sec8p have identical subcellular distribution including peripheral cytoplasm localization, consistent with hSec10p being part of the mammalian exocyst complex involved in post-Golgi traffic.","method":"Cloning, co-transfection, immunofluorescence, Northern/Western blot","journal":"FEBS letters","confidence":"Medium","confidence_rationale":"Tier 2 — co-localization with Sec8p supports complex membership, single lab","pmids":["9119050"],"is_preprint":false},{"year":1998,"finding":"Yeast Sec10p has two functional domains: an N-terminal two-thirds that directly interacts with Sec15p (another exocyst component), whose overexpression displaces Sec10p from the exocyst and blocks exocytosis causing vesicle accumulation; and a C-terminal domain that does not interact with other exocyst components but is required for cell morphogenesis (reorientation of secretory pathway during cell cycle).","method":"Dominant-negative overexpression, biochemical fractionation, genetic analysis in yeast (S. cerevisiae)","journal":"Molecular biology of the cell","confidence":"High","confidence_rationale":"Tier 1 — domain dissection with biochemical interaction assays and phenotypic analysis, ortholog in budding yeast","pmids":["9658167"],"is_preprint":false},{"year":2002,"finding":"Drosophila Sec10 (dSec10) is essential for endocrine (steroid hormone) secretion from the ring gland but is not required for neurotransmission, polarized secretion in nervous system, musculature, gut, or epidermis. Developmental arrest from dSec10 RNAi was partially rescued by feeding ecdysone, placing dSec10 upstream of steroid hormone secretion.","method":"Tissue-specific transgenic RNAi, ecdysone rescue assay, phenotypic characterization in Drosophila","journal":"Traffic","confidence":"High","confidence_rationale":"Tier 2 — tissue-specific KD with defined phenotypic rescue, ortholog in Drosophila","pmids":["12453153"],"is_preprint":false},{"year":2009,"finding":"Exocyst component Sec10 regulates primary ciliogenesis in renal epithelial cells: shRNA knockdown of Sec10 in MDCK cells results in cilia containing only basal bodies (no axoneme), while overexpression increases ciliogenesis. Sec10 knockdown prevents cyst morphogenesis in collagen matrix, overexpression increases cystogenesis. Par3 co-localizes and co-immunoprecipitates with the exocyst, suggesting the exocyst targets vesicles carrying proteins necessary for primary ciliogenesis.","method":"shRNA knockdown, stable overexpression, immunofluorescence, scanning/transmission electron microscopy, co-immunoprecipitation, 3D collagen cyst assay, rescue with human Sec10","journal":"Molecular biology of the cell","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods, rescue experiment confirms specificity, highly cited","pmids":["19297529"],"is_preprint":false},{"year":2011,"finding":"Sec10 biochemically interacts with the ciliary proteins polycystin-2 (PKD2), IFT88, and IFT20, and co-localizes with polycystin-2 at the primary cilium. Sec10 knockdown in zebrafish phenocopies polycystin-2 knockdown (curly tail, left-right patterning defects, glomerular expansion, MAPK activation), and synergistic genetic interaction between sec10 and pkd2 morpholinos supports a model where the exocyst is required for ciliary localization of polycystin-2.","method":"Co-immunoprecipitation, immunofluorescence, zebrafish morpholino knockdown, genetic epistasis (synergistic interaction), MAPK activation assays","journal":"PLoS genetics","confidence":"High","confidence_rationale":"Tier 2 — reciprocal co-IP, genetic epistasis in zebrafish, multiple orthogonal methods","pmids":["21490950"],"is_preprint":false},{"year":2010,"finding":"Sec10 overexpression in renal tubule cells activates the MAPK pathway (elevated basal ERK phosphorylation), which protects epithelial barrier integrity and accelerates recovery following oxidative stress. MAPK inhibitor U0126 blocked the protective effect of Sec10 overexpression, placing Sec10 upstream of ERK in this pathway.","method":"Sec10 overexpression in MDCK cells, transepithelial electrical resistance measurements, H2O2 treatment, pharmacological inhibition of MAPK (U0126), Western blot for p-ERK","journal":"American journal of physiology. Renal physiology","confidence":"Medium","confidence_rationale":"Tier 2 — defined phenotype with pathway inhibition placing Sec10 upstream of ERK, single lab","pmids":["20053792"],"is_preprint":false},{"year":2012,"finding":"Sec10 interacts with the ER translocon subunit Sec61β via GST pulldown, and the exocyst is preferentially recruited to ER membranes during basolateral protein (VSV-G) translation compared to apical protein (hemagglutinin) translation in cell-free assays. Sec10 overexpression increases Sec61β phosphorylation, suggesting a regulatory role for the exocyst in basolateral protein translation/translocation.","method":"GST pulldown, cell-free translation/translocation assay, 32P-orthophosphate labeling, immunoprecipitation","journal":"Nephron. Experimental nephrology","confidence":"Medium","confidence_rationale":"Tier 1-2 — biochemical interaction and cell-free reconstitution, single lab","pmids":["23037926"],"is_preprint":false},{"year":2014,"finding":"SEC-10 (C. elegans ortholog) operates at an intermediate step between early endosomes and recycling endosomes, forming an endosomal tubular network required for basolateral recycling of clathrin-independent endocytic (CIE) cargoes. SEC-10 coordinates with RAB-10 and microtubules to maintain endosomal tubule structure; depletion converts tubules to ring-like structures.","method":"RNAi depletion, epistasis analysis, live imaging in C. elegans intestine","journal":"PNAS","confidence":"High","confidence_rationale":"Tier 2 — epistasis analysis with multiple exocyst components and Rab GTPases, defined pathway position","pmids":["25301900"],"is_preprint":false},{"year":2014,"finding":"The exocyst biochemically interacts with EGFR (co-immunoprecipitation), and Sec10 overexpression enhances EGFR endocytosis and MAPK/ERK activation in response to EGF. Gefitinib (EGFR inhibitor) reverses the protective effect of Sec10 overexpression following renal cell injury, establishing an exocyst–EGFR–endocytosis–MAPK axis in protection from kidney injury.","method":"Co-immunoprecipitation, EGFR endocytosis assays, pharmacological inhibition (gefitinib, Dynasore, U0126), in vivo zebrafish AKI model with sec10 morpholino knockdown","journal":"American journal of physiology. Renal physiology","confidence":"Medium","confidence_rationale":"Tier 2 — biochemical interaction plus functional pharmacological dissection, single lab","pmids":["25298525"],"is_preprint":false},{"year":2015,"finding":"Conditional knockout of Sec10 in ureteric bud-derived cells in mice (first conditional allele for any exocyst gene) causes loss of uroplakin-3 at the urothelial apical surface and subsequent urothelial degeneration, demonstrating Sec10 is required for polarized apical delivery of uroplakin proteins to form luminal plaques in urothelium.","method":"Conditional knockout mouse (Ksp1.3-Cre × Sec10 floxed), immunofluorescence for uroplakin-3, histology, electron microscopy","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 — in vivo conditional KO with defined molecular mechanism (uroplakin trafficking)","pmids":["26046524"],"is_preprint":false},{"year":2015,"finding":"Sec10 knockdown MDCK cells show abnormal mitotic spindle angles (planar cell polarity defect) and increased basal apoptotic cell extrusion; primary cilia assembly is disrupted in both Sec10 KD cysts and kidney-specific Sec10 KO mouse renal tubules. Restoring Sec10 with shRNA-resistant human Sec10 reverses these phenotypes, confirming specificity.","method":"shRNA knockdown, 3D collagen cyst culture, kidney-specific conditional KO mouse, immunofluorescence for mitotic spindle angles, apoptosis assays, rescue with shRNA-resistant Sec10","journal":"American journal of physiology. Cell physiology","confidence":"High","confidence_rationale":"Tier 2 — in vitro and in vivo KO with rescue experiment, multiple phenotypic readouts","pmids":["26040895"],"is_preprint":false},{"year":2015,"finding":"Zebrafish cdc42 and sec10 act in the same genetic pathway (synergistic interaction upon suboptimal morpholino co-injection) to regulate outer segment development of retinal photoreceptors through trafficking proteins necessary for ciliogenesis. Sec10 knockdown additionally causes intracellular transport defects affecting retrograde melanosome transport.","method":"Zebrafish morpholino knockdown, genetic epistasis (synergistic morpholino interaction), histology, immunohistology, TEM, melanosome transport assay","journal":"Investigative ophthalmology & visual science","confidence":"Medium","confidence_rationale":"Tier 2 — genetic epistasis places sec10 and cdc42 in same pathway, single lab","pmids":["26024121"],"is_preprint":false},{"year":2017,"finding":"Crystal structure of near-full-length zebrafish Sec10 was solved at 2.73 Å resolution, revealing tandem antiparallel helix bundles forming a straight rod, consistent with the helical architecture of other exocyst subunits.","method":"X-ray crystallography","journal":"Scientific reports","confidence":"High","confidence_rationale":"Tier 1 — atomic resolution crystal structure","pmids":["28098232"],"is_preprint":false},{"year":2018,"finding":"Sec10 downregulation in MDCK cells accelerates wound healing and ruffle formation by reducing DGK-gamma at the leading edge. Sec10 overexpression inhibits cell migration by increasing DGKγ at the leading edge; a DGK inhibitor reverses this inhibition, placing Sec10 upstream of DGKγ in the regulation of cell migration.","method":"Sec10 overexpression/knockdown in MDCK cells, wound scratch assay, DGK inhibitor treatment, immunofluorescence for DGKγ localization, in vivo I/R mouse model","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 — pharmacological rescue links Sec10 to DGKγ-mediated migration, single lab","pmids":["29326040"],"is_preprint":false},{"year":2018,"finding":"Hair cell-specific deletion of Exoc5 in mice (Gfi1Cre/+;Exoc5f/f) results in progressive hair cell apoptosis with disorganized stereociliary bundles and hearing loss; deletion throughout the otic epithelium additionally causes abnormal spiral ganglion neuron neurite morphology and subsequent SGN apoptosis, demonstrating Exoc5 is required for survival of cochlear hair cells and SGNs.","method":"Conditional knockout mouse (Gfi1Cre and rAAV-iCre), auditory brainstem response, histology, immunofluorescence, apoptosis assays","journal":"Molecular neurobiology","confidence":"High","confidence_rationale":"Tier 2 — in vivo conditional KO with defined cellular phenotype (apoptosis, stereociliary disorganization)","pmids":["29327200"],"is_preprint":false},{"year":2021,"finding":"RPE-specific conditional knockout of Exoc5 in mice causes RPE dysfunction (abnormal RPE65 levels, reduced c-wave amplitude), retinal thinning, and loss of visual pigments with progressive photoreceptor degeneration. In exoc5 zebrafish mutants, shorter photoreceptor outer segments and loss of melanocytes in RPE were observed, demonstrating Exoc5 is required for RPE structure and function.","method":"Conditional KO mouse (RPE-specific), electroretinography, zebrafish exoc5 mutants, histology, immunofluorescence for visual pigments","journal":"International journal of molecular sciences","confidence":"High","confidence_rationale":"Tier 2 — in vivo KO in two model systems with functional visual measurements","pmids":["34064901"],"is_preprint":false},{"year":2025,"finding":"Sec10 attenuates antiviral JAK-STAT signaling by interacting with E3 ligase STUB1, promoting STUB1-STAT1 interaction, and accelerating proteasomal degradation of STAT1 via K6-linked polyubiquitination at Lys240 and Lys652. Myeloid-specific Exoc5 knockout mice show enhanced IFN-I response and improved viral infection survival.","method":"Co-immunoprecipitation, ubiquitination assays with site-specific mutants (K240R, K652R), myeloid-specific conditional KO mice, IFN signaling assays","journal":"PLoS pathogens","confidence":"High","confidence_rationale":"Tier 1-2 — biochemical mechanism with site-specific mutagenesis, confirmed in vivo with conditional KO","pmids":["40920886"],"is_preprint":false},{"year":2025,"finding":"Sec10 negatively regulates antiviral innate immunity by inhibiting the NRF2-ATF4 axis during RNA viral infection, which suppresses ATF4-driven transcription of the RIG-I promoter, thereby reducing RIG-I expression and IFN-I response. Sec10 deficiency enhances innate immunity and reduces viral load in mice.","method":"ChIP/promoter analysis showing ATF4 binding to RIG-I promoter, Sec10 KO cells and mice, IFN signaling assays, RNA viral infection models","journal":"International journal of biological sciences","confidence":"Medium","confidence_rationale":"Tier 2 — mechanistic pathway defined with promoter analysis and in vivo KO, single lab","pmids":["41079927"],"is_preprint":false},{"year":2024,"finding":"Oocyte-specific deletion of Exoc5 (Zp3-Exoc5-cKO) blocks folliculogenesis past the secondary follicle stage in adult waves (subsequent waves undergo apoptosis at preantral stage), while first-wave folliculogenesis proceeds to antral stage but produces developmentally incompetent oocytes. This demonstrates EXOC5 is required for follicular development and oocyte developmental competence.","method":"Conditional knockout mouse (Zp3-Cre × Exoc5 floxed), IVF, histology, superovulation","journal":"Molecular human reproduction","confidence":"High","confidence_rationale":"Tier 2 — in vivo oocyte-specific KO with defined developmental phenotype and functional competence assay","pmids":["39037927"],"is_preprint":false},{"year":2026,"finding":"EXOC5 facilitates autophagic degradation of STING1 via K63-linked polyubiquitination at Lys224 and Lys338 by E3 ligase TRIM56, with SQSTM1/p62 serving as cargo receptor, thereby suppressing cGAS-STING1-driven IFN-I antiviral signaling. Myeloid-specific Exoc5 KO mice show improved survival and reduced viral load.","method":"Co-immunoprecipitation, ubiquitination assays with K63R mutants and site-specific mutations, autophagy flux assays, myeloid-specific conditional KO mice","journal":"Autophagy","confidence":"High","confidence_rationale":"Tier 1-2 — biochemical mechanism with site-specific mutagenesis confirmed in vivo with conditional KO","pmids":["41968661"],"is_preprint":false},{"year":2026,"finding":"Myeloid-specific Exoc5 deficiency reduces exosome release from macrophages, leading to intracellular accumulation of formin1, which enhances macrophage migration into the kidney. An actin disruptor and formin1 inhibitor reversed the enhanced migration phenotype, placing Exoc5-mediated exosome secretion upstream of formin1-dependent macrophage motility.","method":"LysM-Cre × Exoc5 floxed conditional KO mice, exosome quantification, formin1 localization, pharmacological inhibition (actin disruptor, formin1 inhibitor, Rac1 inhibitor), macrophage migration assays, adoptive transfer","journal":"Biomedicine & pharmacotherapy","confidence":"Medium","confidence_rationale":"Tier 2 — in vivo conditional KO with pharmacological rescue defining formin1 as effector, single lab","pmids":["41604889"],"is_preprint":false},{"year":2026,"finding":"Exoc5 deficiency in renal proximal tubule cells increases YAP expression and activation, and augments TGF-β-induced YAP activation and epithelial-to-mesenchymal transition, worsening kidney fibrosis following ureteral obstruction. This places Exoc5 as a negative regulator of YAP signaling in the context of renal fibrosis.","method":"Proximal tubule-specific conditional KO mouse (PEPCK-Cre), unilateral ureteral obstruction model, siRNA knockdown in HK-2 cells, Western blot for YAP/CTGF/CYR61/Pax2","journal":"Experimental & molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 — in vivo and in vitro KO with defined molecular pathway, single lab","pmids":["41781492"],"is_preprint":false}],"current_model":"EXOC5/Sec10 is a central structural subunit of the octameric exocyst complex (with tandem antiparallel helix-bundle architecture) that mediates polarized exocytosis by tethering secretory vesicles to the plasma membrane; it interacts with Sec15p (via its N-terminal domain) and Sec61β at the ER, facilitates ciliary targeting of polycystin-2 and IFT proteins, regulates primary ciliogenesis and epithelial morphogenesis, controls EGFR endocytosis and MAPK/ERK signaling to protect against cell injury, and in immune contexts suppresses antiviral IFN-I responses by promoting STUB1-mediated proteasomal degradation of STAT1, TRIM56-mediated autophagic degradation of STING1, and suppression of the NRF2-ATF4-RIG-I transcriptional axis."},"narrative":{"teleology":[{"year":1997,"claim":"Establishing that EXOC5 is the mammalian exocyst subunit answered whether the yeast Sec10p-based secretory machinery is conserved in humans and placed EXOC5 in the post-Golgi trafficking pathway.","evidence":"Cloning of human SEC10 and co-localization with Sec8p by immunofluorescence in mammalian cells","pmids":["9119050"],"confidence":"Medium","gaps":["No direct biochemical demonstration of complex membership in mammalian cells","Functional requirement not yet tested"]},{"year":1998,"claim":"Domain dissection of yeast Sec10p revealed that its N-terminus binds Sec15p to anchor the complex while its C-terminus independently directs polarized morphogenesis, establishing EXOC5 as a bifunctional scaffold within the exocyst.","evidence":"Dominant-negative overexpression of Sec10p domains, biochemical fractionation, and genetic analysis in S. cerevisiae","pmids":["9658167"],"confidence":"High","gaps":["Whether mammalian EXOC5 retains the same domain-function separation","Identity of C-terminal binding partners"]},{"year":2002,"claim":"Tissue-specific knockdown in Drosophila demonstrated that EXOC5 is selectively essential for endocrine secretion (steroid hormone release from the ring gland) rather than being universally required for all polarized exocytosis, revealing cell-type-specific dependence.","evidence":"Tissue-specific transgenic RNAi in Drosophila with ecdysone rescue","pmids":["12453153"],"confidence":"High","gaps":["Whether tissue-selective requirement reflects redundancy with other exocyst subunits or cargo specificity"]},{"year":2009,"claim":"The discovery that EXOC5 knockdown abolishes primary cilium axoneme formation while overexpression enhances ciliogenesis fundamentally expanded the exocyst's role beyond plasma-membrane-directed exocytosis to ciliary biogenesis.","evidence":"shRNA knockdown and overexpression in MDCK cells with electron microscopy, co-IP with Par3, 3D cyst assays, and rescue with human Sec10","pmids":["19297529"],"confidence":"High","gaps":["Which specific ciliary cargoes require exocyst-mediated delivery","How Par3 interaction recruits the exocyst to the cilium base"]},{"year":2011,"claim":"Identifying EXOC5 as a physical interactor of polycystin-2, IFT88, and IFT20, and showing genetic epistasis with pkd2 in zebrafish, established a molecular mechanism linking the exocyst to ciliopathy-relevant cargo trafficking and left-right body axis patterning.","evidence":"Co-immunoprecipitation, zebrafish morpholino epistasis, and MAPK activation assays","pmids":["21490950"],"confidence":"High","gaps":["Whether EXOC5 directly loads ciliary cargoes or acts indirectly through vesicle tethering","Structural basis of EXOC5–IFT interaction"]},{"year":2010,"claim":"Demonstrating that EXOC5 overexpression activates MAPK/ERK signaling and protects epithelial barriers from oxidative injury placed the exocyst upstream of a major pro-survival kinase cascade in renal cells.","evidence":"MDCK overexpression with U0126 pharmacological inhibition, transepithelial resistance after H₂O₂ treatment","pmids":["20053792"],"confidence":"Medium","gaps":["Whether MAPK activation is direct or secondary to enhanced receptor trafficking","Mechanism connecting vesicle trafficking to ERK phosphorylation"]},{"year":2012,"claim":"The finding that EXOC5 binds the ER translocon subunit Sec61β and is preferentially recruited to ER membranes during basolateral protein translation extended the exocyst's function upstream from the Golgi to the ER, suggesting a role in co-translational sorting.","evidence":"GST pulldown and cell-free translation/translocation assay with ³²P-labeling","pmids":["23037926"],"confidence":"Medium","gaps":["Whether ER recruitment is physiologically rate-limiting for basolateral sorting in vivo","Structural basis of EXOC5–Sec61β interaction"]},{"year":2014,"claim":"Two studies in 2014 defined EXOC5's role in endosomal recycling and EGFR signaling: in C. elegans, SEC-10 maintains endosomal tubular networks for basolateral recycling of clathrin-independent cargoes, while in mammalian cells, the exocyst-EGFR interaction drives EGFR endocytosis and downstream MAPK activation that protects against kidney injury.","evidence":"C. elegans RNAi with live imaging and epistasis analysis; mammalian co-IP with pharmacological inhibition (gefitinib, Dynasore, U0126) and zebrafish AKI model","pmids":["25301900","25298525"],"confidence":"High","gaps":["Whether EXOC5 directly tethers EGFR-containing endosomes or acts through adaptor proteins","Conservation of endosomal tubule role in mammalian cells"]},{"year":2015,"claim":"Conditional knockout of Exoc5 in mouse ureteric bud-derived cells, combined with MDCK cyst analyses, demonstrated that EXOC5 is essential for apical uroplakin delivery, mitotic spindle orientation, and ciliogenesis in vivo, consolidating its role in multiple axes of epithelial polarity.","evidence":"Conditional KO mouse (Ksp1.3-Cre), shRNA knockdown with rescue, EM for uroplakin plaques, spindle angle measurements, 3D cyst culture","pmids":["26046524","26040895"],"confidence":"High","gaps":["Molecular basis for spindle orientation defect","Whether polarity and ciliogenesis defects are independent or sequential consequences of trafficking failure"]},{"year":2017,"claim":"The crystal structure of near-full-length zebrafish Sec10 at 2.73 Å confirmed the tandem antiparallel helix-bundle rod architecture conserved among exocyst subunits, providing the first atomic model for this subunit.","evidence":"X-ray crystallography of zebrafish Sec10","pmids":["28098232"],"confidence":"High","gaps":["No structure of EXOC5 in complex with other exocyst subunits or cargo adaptors","Human EXOC5 structure not yet determined"]},{"year":2018,"claim":"Hair cell-specific Exoc5 deletion causing stereociliary disorganization and progressive cochlear cell death, along with the EXOC5–DGKγ axis controlling cell migration, demonstrated that EXOC5 has non-redundant roles in sensory cell survival and wound-healing migration.","evidence":"Conditional KO mouse (Gfi1Cre) with ABR testing; MDCK wound assay with DGK inhibitor rescue","pmids":["29327200","29326040"],"confidence":"High","gaps":["Whether stereociliary defect is secondary to ciliogenesis failure or a distinct trafficking defect","Direct mechanism linking EXOC5 to DGKγ localization"]},{"year":2021,"claim":"RPE-specific Exoc5 knockout causing photoreceptor degeneration in both mice and zebrafish established EXOC5 as essential for retinal pigment epithelium function and visual cycle maintenance.","evidence":"RPE-specific conditional KO mouse, electroretinography, zebrafish exoc5 mutants with histology","pmids":["34064901"],"confidence":"High","gaps":["Which RPE cargoes require EXOC5 for trafficking","Relationship between RPE EXOC5 loss and photoreceptor outer segment maintenance"]},{"year":2024,"claim":"Oocyte-specific deletion showed that EXOC5 is required for folliculogenesis beyond the secondary follicle stage and for oocyte developmental competence, extending the gene's essential trafficking roles to female germ cells.","evidence":"Zp3-Cre conditional KO mouse, IVF, superovulation, histology","pmids":["39037927"],"confidence":"High","gaps":["Identity of oocyte cargoes requiring EXOC5-dependent secretion","Whether the folliculogenesis block reflects paracrine signaling failure or cell-autonomous defect"]},{"year":2025,"claim":"The identification of three convergent mechanisms by which EXOC5 suppresses antiviral IFN-I signaling—STUB1-mediated proteasomal degradation of STAT1 via K6-linked ubiquitination, TRIM56/p62-mediated autophagic degradation of STING1 via K63-linked ubiquitination, and NRF2–ATF4 axis inhibition reducing RIG-I transcription—revealed an unexpected immunomodulatory function for this trafficking subunit.","evidence":"Co-IP with ubiquitination site-specific mutants, autophagy flux assays, ChIP/promoter analysis, myeloid-specific conditional KO mice with viral challenge","pmids":["40920886","41079927","41968661"],"confidence":"High","gaps":["Whether EXOC5's immune role depends on its exocyst complex membership or is an independent moonlighting function","Physiological context where immune suppression by EXOC5 is beneficial versus detrimental"]},{"year":2026,"claim":"Two studies extended EXOC5's functions to exosome-regulated macrophage migration (via formin1 retention) and negative regulation of YAP signaling in renal fibrosis, broadening its role to intercellular communication and mechanotransduction pathways.","evidence":"LysM-Cre and PEPCK-Cre conditional KO mice, exosome quantification, pharmacological inhibition of formin1/Rac1, UUO fibrosis model, siRNA in HK-2 cells","pmids":["41604889","41781492"],"confidence":"Medium","gaps":["Molecular mechanism connecting EXOC5 to YAP expression levels","Whether exosome release defect is a direct consequence of exocyst dysfunction at multivesicular bodies","Independent replication needed for both formin1 and YAP pathways"]},{"year":null,"claim":"Major open questions include whether EXOC5's immunomodulatory functions are exocyst-dependent or represent moonlighting roles, the structural basis for EXOC5's interaction with diverse cargo adaptors (IFTs, EGFR, STUB1, TRIM56), and how tissue-specific trafficking requirements explain the diverse conditional knockout phenotypes across epithelia, sensory cells, immune cells, and germ cells.","evidence":"","pmids":[],"confidence":"Low","gaps":["No cryo-EM or crystal structure of EXOC5 in assembled exocyst complex with cargo","Exocyst-independent versus exocyst-dependent functions not dissected","No human genetic disease directly linked to EXOC5 mutations in the timeline"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0005198","term_label":"structural molecule activity","supporting_discovery_ids":[1,12]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[16,19]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[0]},{"term_id":"GO:0005886","term_label":"plasma membrane","supporting_discovery_ids":[0,3,9]},{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[6]},{"term_id":"GO:0005768","term_label":"endosome","supporting_discovery_ids":[7]},{"term_id":"GO:0031410","term_label":"cytoplasmic vesicle","supporting_discovery_ids":[7,8]},{"term_id":"GO:0005929","term_label":"cilium","supporting_discovery_ids":[3,4]}],"pathway":[{"term_id":"R-HSA-5653656","term_label":"Vesicle-mediated transport","supporting_discovery_ids":[0,1,3,7,9]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[19]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[5,8,16,17,21]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[16,17,19]},{"term_id":"R-HSA-1852241","term_label":"Organelle biogenesis and maintenance","supporting_discovery_ids":[3,4,10,11]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[16,19]},{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[4,6,9]}],"complexes":["Exocyst complex"],"partners":["SEC15","SEC61B","PKD2","IFT88","IFT20","EGFR","STUB1","TRIM56"],"other_free_text":[]},"mechanistic_narrative":"EXOC5 (Sec10) is a core subunit of the octameric exocyst complex that mediates polarized vesicle trafficking, primary ciliogenesis, and innate immune regulation across diverse cell types. Structurally a tandem antiparallel helix-bundle rod, EXOC5 bridges the exocyst to cargo via its N-terminal interaction with Sec15p and engages the ER translocon subunit Sec61β, facilitating basolateral protein translocation and polarized delivery of apical cargoes such as uroplakins and ciliary proteins including polycystin-2, IFT88, and IFT20 [PMID:9658167, PMID:23037926, PMID:26046524, PMID:21490950]. Conditional knockouts in mice demonstrate essential roles in primary ciliogenesis in renal epithelia, cochlear hair cell survival, retinal pigment epithelium integrity, folliculogenesis, and urothelial differentiation [PMID:19297529, PMID:29327200, PMID:34064901, PMID:39037927]. In myeloid cells, EXOC5 suppresses antiviral type I interferon responses through three convergent mechanisms: promoting STUB1-mediated K6-linked polyubiquitination and proteasomal degradation of STAT1, facilitating TRIM56-mediated K63-linked polyubiquitination and autophagic degradation of STING1 via SQSTM1/p62, and inhibiting the NRF2–ATF4 transcriptional axis that drives RIG-I expression [PMID:40920886, PMID:41968661, PMID:41079927]."},"prefetch_data":{"uniprot":{"accession":"O00471","full_name":"Exocyst complex component 5","aliases":["Exocyst complex component Sec10","hSec10"],"length_aa":708,"mass_kda":81.9,"function":"Component of the exocyst complex involved in the docking of exocytic vesicles with fusion sites on the plasma membrane","subcellular_location":"Cytoplasm; Midbody","url":"https://www.uniprot.org/uniprotkb/O00471/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/EXOC5","classification":"Common Essential","n_dependent_lines":693,"n_total_lines":1208,"dependency_fraction":0.5736754966887417},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"CBX1","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/EXOC5","total_profiled":1310},"omim":[{"mim_id":"615283","title":"EXOCYST COMPLEX COMPONENT 8; EXOC8","url":"https://www.omim.org/entry/615283"},{"mim_id":"614117","title":"EXOCYST COMPLEX COMPONENT 3-LIKE 1; EXOC3L1","url":"https://www.omim.org/entry/614117"},{"mim_id":"604469","title":"EXOCYST COMPLEX COMPONENT 5; EXOC5","url":"https://www.omim.org/entry/604469"},{"mim_id":"179551","title":"RAS-LIKE PROTOONCOGENE B; RALB","url":"https://www.omim.org/entry/179551"},{"mim_id":"179550","title":"RAS-LIKE PROTOONCOGENE A; RALA","url":"https://www.omim.org/entry/179550"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Vesicles","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/EXOC5"},"hgnc":{"alias_symbol":["SEC10","SEC10P"],"prev_symbol":["SEC10L1"]},"alphafold":{"accession":"O00471","domains":[{"cath_id":"1.20.58","chopping":"561-707","consensus_level":"high","plddt":90.7618,"start":561,"end":707},{"cath_id":"1.20.5","chopping":"39-121","consensus_level":"high","plddt":91.5154,"start":39,"end":121},{"cath_id":"1.20.190","chopping":"377-394_403-547","consensus_level":"high","plddt":84.8871,"start":377,"end":547}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O00471","model_url":"https://alphafold.ebi.ac.uk/files/AF-O00471-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O00471-F1-predicted_aligned_error_v6.png","plddt_mean":86.69},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=EXOC5","jax_strain_url":"https://www.jax.org/strain/search?query=EXOC5"},"sequence":{"accession":"O00471","fasta_url":"https://rest.uniprot.org/uniprotkb/O00471.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O00471/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O00471"}},"corpus_meta":[{"pmid":"19297529","id":"PMC_19297529","title":"The exocyst protein Sec10 is necessary for primary ciliogenesis and cystogenesis in vitro.","date":"2009","source":"Molecular biology of the cell","url":"https://pubmed.ncbi.nlm.nih.gov/19297529","citation_count":151,"is_preprint":false},{"pmid":"21490950","id":"PMC_21490950","title":"The exocyst protein Sec10 interacts with Polycystin-2 and knockdown causes PKD-phenotypes.","date":"2011","source":"PLoS genetics","url":"https://pubmed.ncbi.nlm.nih.gov/21490950","citation_count":78,"is_preprint":false},{"pmid":"12453153","id":"PMC_12453153","title":"Drosophila sec10 is required for hormone secretion but not general exocytosis or neurotransmission.","date":"2002","source":"Traffic (Copenhagen, Denmark)","url":"https://pubmed.ncbi.nlm.nih.gov/12453153","citation_count":40,"is_preprint":false},{"pmid":"26046524","id":"PMC_26046524","title":"Urothelial Defects from Targeted Inactivation of Exocyst Sec10 in Mice Cause Ureteropelvic Junction Obstructions.","date":"2015","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/26046524","citation_count":39,"is_preprint":false},{"pmid":"9658167","id":"PMC_9658167","title":"Dominant negative alleles of SEC10 reveal distinct domains involved in secretion and morphogenesis in yeast.","date":"1998","source":"Molecular biology of the cell","url":"https://pubmed.ncbi.nlm.nih.gov/9658167","citation_count":37,"is_preprint":false},{"pmid":"9119050","id":"PMC_9119050","title":"Identification and characterization of homologues of the Exocyst component Sec10p.","date":"1997","source":"FEBS letters","url":"https://pubmed.ncbi.nlm.nih.gov/9119050","citation_count":36,"is_preprint":false},{"pmid":"25301900","id":"PMC_25301900","title":"SEC-10 and RAB-10 coordinate basolateral recycling of clathrin-independent cargo through endosomal tubules in Caenorhabditis elegans.","date":"2014","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/25301900","citation_count":32,"is_preprint":false},{"pmid":"20053792","id":"PMC_20053792","title":"Exocyst Sec10 protects epithelial barrier integrity and enhances recovery following oxidative stress, by activation of the MAPK pathway.","date":"2010","source":"American journal of physiology. Renal physiology","url":"https://pubmed.ncbi.nlm.nih.gov/20053792","citation_count":25,"is_preprint":false},{"pmid":"24728280","id":"PMC_24728280","title":"Dissecting a hidden gene duplication: the Arabidopsis thaliana SEC10 locus.","date":"2014","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/24728280","citation_count":25,"is_preprint":false},{"pmid":"26024121","id":"PMC_26024121","title":"Cdc42 and sec10 Are Required for Normal Retinal Development in Zebrafish.","date":"2015","source":"Investigative ophthalmology & visual science","url":"https://pubmed.ncbi.nlm.nih.gov/26024121","citation_count":24,"is_preprint":false},{"pmid":"25298525","id":"PMC_25298525","title":"Exocyst Sec10 protects renal tubule cells from injury by EGFR/MAPK activation and effects on endocytosis.","date":"2014","source":"American journal of physiology. Renal physiology","url":"https://pubmed.ncbi.nlm.nih.gov/25298525","citation_count":20,"is_preprint":false},{"pmid":"26040895","id":"PMC_26040895","title":"The exocyst gene Sec10 regulates renal epithelial monolayer homeostasis and apoptotic sensitivity.","date":"2015","source":"American journal of physiology. Cell physiology","url":"https://pubmed.ncbi.nlm.nih.gov/26040895","citation_count":19,"is_preprint":false},{"pmid":"29374070","id":"PMC_29374070","title":"An ancient Sec10-formin fusion provides insights into actin-mediated regulation of exocytosis.","date":"2018","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/29374070","citation_count":19,"is_preprint":false},{"pmid":"28098232","id":"PMC_28098232","title":"Crystal structure of Sec10, a subunit of the exocyst complex.","date":"2017","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/28098232","citation_count":16,"is_preprint":false},{"pmid":"29327200","id":"PMC_29327200","title":"Exocyst Complex Member EXOC5 Is Required for Survival of Hair Cells and Spiral Ganglion Neurons and Maintenance of Hearing.","date":"2018","source":"Molecular neurobiology","url":"https://pubmed.ncbi.nlm.nih.gov/29327200","citation_count":9,"is_preprint":false},{"pmid":"29326040","id":"PMC_29326040","title":"Downregulation of exocyst Sec10 accelerates kidney tubule cell recovery through enhanced cell migration.","date":"2018","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/29326040","citation_count":7,"is_preprint":false},{"pmid":"34064901","id":"PMC_34064901","title":"Conditional Loss of the Exocyst Component Exoc5 in Retinal Pigment Epithelium (RPE) Results in RPE Dysfunction, Photoreceptor Cell Degeneration, and Decreased Visual Function.","date":"2021","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/34064901","citation_count":6,"is_preprint":false},{"pmid":"23037926","id":"PMC_23037926","title":"Exocyst Sec10 is involved in basolateral protein translation and translocation in the endoplasmic reticulum.","date":"2012","source":"Nephron. Experimental nephrology","url":"https://pubmed.ncbi.nlm.nih.gov/23037926","citation_count":5,"is_preprint":false},{"pmid":"39037927","id":"PMC_39037927","title":"Oocyte-specific EXOC5 expression is required for mouse oogenesis and folliculogenesis.","date":"2024","source":"Molecular human reproduction","url":"https://pubmed.ncbi.nlm.nih.gov/39037927","citation_count":3,"is_preprint":false},{"pmid":"40920886","id":"PMC_40920886","title":"Sec10 suppresses antiviral innate immune response by facilitating STUB1-mediated STAT1 degradation.","date":"2025","source":"PLoS pathogens","url":"https://pubmed.ncbi.nlm.nih.gov/40920886","citation_count":2,"is_preprint":false},{"pmid":"41079927","id":"PMC_41079927","title":"Sec10 negatively regulates antiviral immunity by downregulating NRF2-ATF4-RIG-I axis.","date":"2025","source":"International journal of biological sciences","url":"https://pubmed.ncbi.nlm.nih.gov/41079927","citation_count":1,"is_preprint":false},{"pmid":"41903488","id":"PMC_41903488","title":"SEC10 suppresses KLF15-mediated transcriptional activation of JAK1 and promotes BoHV-1 replication.","date":"2026","source":"Veterinary microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/41903488","citation_count":0,"is_preprint":false},{"pmid":"41604889","id":"PMC_41604889","title":"Myeloid-specific Exoc5 deficiency develops renal inflammation and hypertension.","date":"2026","source":"Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie","url":"https://pubmed.ncbi.nlm.nih.gov/41604889","citation_count":0,"is_preprint":false},{"pmid":"41781492","id":"PMC_41781492","title":"Deficiency of exocyst complex component Exoc5 exacerbates the progression of kidney fibrosis.","date":"2026","source":"Experimental & molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/41781492","citation_count":0,"is_preprint":false},{"pmid":"41968661","id":"PMC_41968661","title":"EXOC5/SEC10 attenuates antiviral IFN-I signaling by targeting STING1 for autophagic degradation.","date":"2026","source":"Autophagy","url":"https://pubmed.ncbi.nlm.nih.gov/41968661","citation_count":0,"is_preprint":false},{"pmid":"40632529","id":"PMC_40632529","title":"The C-terminal domain of SEC-10 is fundamental for exocyst function, apical organization, and cell morphogenesis in Neurospora crassa.","date":"2025","source":"Molecular biology of the cell","url":"https://pubmed.ncbi.nlm.nih.gov/40632529","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":14078,"output_tokens":5576,"usd":0.062937},"stage2":{"model":"claude-opus-4-6","input_tokens":9161,"output_tokens":4082,"usd":0.221782},"total_usd":0.284719,"stage1_batch_id":"msgbatch_0118RScg3WGaGkaZRtWZbtce","stage2_batch_id":"msgbatch_01Cpfzvtbj42aqp5oYZ5Te2s","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1997,\n      \"finding\": \"Human SEC10 (hSec10p) was identified as the human homologue of yeast Sec10p, a component of the exocyst complex. Co-transfection and immunofluorescence showed that hSec10p and mammalian Sec8p have identical subcellular distribution including peripheral cytoplasm localization, consistent with hSec10p being part of the mammalian exocyst complex involved in post-Golgi traffic.\",\n      \"method\": \"Cloning, co-transfection, immunofluorescence, Northern/Western blot\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — co-localization with Sec8p supports complex membership, single lab\",\n      \"pmids\": [\"9119050\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"Yeast Sec10p has two functional domains: an N-terminal two-thirds that directly interacts with Sec15p (another exocyst component), whose overexpression displaces Sec10p from the exocyst and blocks exocytosis causing vesicle accumulation; and a C-terminal domain that does not interact with other exocyst components but is required for cell morphogenesis (reorientation of secretory pathway during cell cycle).\",\n      \"method\": \"Dominant-negative overexpression, biochemical fractionation, genetic analysis in yeast (S. cerevisiae)\",\n      \"journal\": \"Molecular biology of the cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — domain dissection with biochemical interaction assays and phenotypic analysis, ortholog in budding yeast\",\n      \"pmids\": [\"9658167\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Drosophila Sec10 (dSec10) is essential for endocrine (steroid hormone) secretion from the ring gland but is not required for neurotransmission, polarized secretion in nervous system, musculature, gut, or epidermis. Developmental arrest from dSec10 RNAi was partially rescued by feeding ecdysone, placing dSec10 upstream of steroid hormone secretion.\",\n      \"method\": \"Tissue-specific transgenic RNAi, ecdysone rescue assay, phenotypic characterization in Drosophila\",\n      \"journal\": \"Traffic\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — tissue-specific KD with defined phenotypic rescue, ortholog in Drosophila\",\n      \"pmids\": [\"12453153\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Exocyst component Sec10 regulates primary ciliogenesis in renal epithelial cells: shRNA knockdown of Sec10 in MDCK cells results in cilia containing only basal bodies (no axoneme), while overexpression increases ciliogenesis. Sec10 knockdown prevents cyst morphogenesis in collagen matrix, overexpression increases cystogenesis. Par3 co-localizes and co-immunoprecipitates with the exocyst, suggesting the exocyst targets vesicles carrying proteins necessary for primary ciliogenesis.\",\n      \"method\": \"shRNA knockdown, stable overexpression, immunofluorescence, scanning/transmission electron microscopy, co-immunoprecipitation, 3D collagen cyst assay, rescue with human Sec10\",\n      \"journal\": \"Molecular biology of the cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods, rescue experiment confirms specificity, highly cited\",\n      \"pmids\": [\"19297529\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Sec10 biochemically interacts with the ciliary proteins polycystin-2 (PKD2), IFT88, and IFT20, and co-localizes with polycystin-2 at the primary cilium. Sec10 knockdown in zebrafish phenocopies polycystin-2 knockdown (curly tail, left-right patterning defects, glomerular expansion, MAPK activation), and synergistic genetic interaction between sec10 and pkd2 morpholinos supports a model where the exocyst is required for ciliary localization of polycystin-2.\",\n      \"method\": \"Co-immunoprecipitation, immunofluorescence, zebrafish morpholino knockdown, genetic epistasis (synergistic interaction), MAPK activation assays\",\n      \"journal\": \"PLoS genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal co-IP, genetic epistasis in zebrafish, multiple orthogonal methods\",\n      \"pmids\": [\"21490950\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Sec10 overexpression in renal tubule cells activates the MAPK pathway (elevated basal ERK phosphorylation), which protects epithelial barrier integrity and accelerates recovery following oxidative stress. MAPK inhibitor U0126 blocked the protective effect of Sec10 overexpression, placing Sec10 upstream of ERK in this pathway.\",\n      \"method\": \"Sec10 overexpression in MDCK cells, transepithelial electrical resistance measurements, H2O2 treatment, pharmacological inhibition of MAPK (U0126), Western blot for p-ERK\",\n      \"journal\": \"American journal of physiology. Renal physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — defined phenotype with pathway inhibition placing Sec10 upstream of ERK, single lab\",\n      \"pmids\": [\"20053792\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Sec10 interacts with the ER translocon subunit Sec61β via GST pulldown, and the exocyst is preferentially recruited to ER membranes during basolateral protein (VSV-G) translation compared to apical protein (hemagglutinin) translation in cell-free assays. Sec10 overexpression increases Sec61β phosphorylation, suggesting a regulatory role for the exocyst in basolateral protein translation/translocation.\",\n      \"method\": \"GST pulldown, cell-free translation/translocation assay, 32P-orthophosphate labeling, immunoprecipitation\",\n      \"journal\": \"Nephron. Experimental nephrology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 — biochemical interaction and cell-free reconstitution, single lab\",\n      \"pmids\": [\"23037926\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SEC-10 (C. elegans ortholog) operates at an intermediate step between early endosomes and recycling endosomes, forming an endosomal tubular network required for basolateral recycling of clathrin-independent endocytic (CIE) cargoes. SEC-10 coordinates with RAB-10 and microtubules to maintain endosomal tubule structure; depletion converts tubules to ring-like structures.\",\n      \"method\": \"RNAi depletion, epistasis analysis, live imaging in C. elegans intestine\",\n      \"journal\": \"PNAS\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — epistasis analysis with multiple exocyst components and Rab GTPases, defined pathway position\",\n      \"pmids\": [\"25301900\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"The exocyst biochemically interacts with EGFR (co-immunoprecipitation), and Sec10 overexpression enhances EGFR endocytosis and MAPK/ERK activation in response to EGF. Gefitinib (EGFR inhibitor) reverses the protective effect of Sec10 overexpression following renal cell injury, establishing an exocyst–EGFR–endocytosis–MAPK axis in protection from kidney injury.\",\n      \"method\": \"Co-immunoprecipitation, EGFR endocytosis assays, pharmacological inhibition (gefitinib, Dynasore, U0126), in vivo zebrafish AKI model with sec10 morpholino knockdown\",\n      \"journal\": \"American journal of physiology. Renal physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — biochemical interaction plus functional pharmacological dissection, single lab\",\n      \"pmids\": [\"25298525\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Conditional knockout of Sec10 in ureteric bud-derived cells in mice (first conditional allele for any exocyst gene) causes loss of uroplakin-3 at the urothelial apical surface and subsequent urothelial degeneration, demonstrating Sec10 is required for polarized apical delivery of uroplakin proteins to form luminal plaques in urothelium.\",\n      \"method\": \"Conditional knockout mouse (Ksp1.3-Cre × Sec10 floxed), immunofluorescence for uroplakin-3, histology, electron microscopy\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — in vivo conditional KO with defined molecular mechanism (uroplakin trafficking)\",\n      \"pmids\": [\"26046524\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Sec10 knockdown MDCK cells show abnormal mitotic spindle angles (planar cell polarity defect) and increased basal apoptotic cell extrusion; primary cilia assembly is disrupted in both Sec10 KD cysts and kidney-specific Sec10 KO mouse renal tubules. Restoring Sec10 with shRNA-resistant human Sec10 reverses these phenotypes, confirming specificity.\",\n      \"method\": \"shRNA knockdown, 3D collagen cyst culture, kidney-specific conditional KO mouse, immunofluorescence for mitotic spindle angles, apoptosis assays, rescue with shRNA-resistant Sec10\",\n      \"journal\": \"American journal of physiology. Cell physiology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — in vitro and in vivo KO with rescue experiment, multiple phenotypic readouts\",\n      \"pmids\": [\"26040895\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Zebrafish cdc42 and sec10 act in the same genetic pathway (synergistic interaction upon suboptimal morpholino co-injection) to regulate outer segment development of retinal photoreceptors through trafficking proteins necessary for ciliogenesis. Sec10 knockdown additionally causes intracellular transport defects affecting retrograde melanosome transport.\",\n      \"method\": \"Zebrafish morpholino knockdown, genetic epistasis (synergistic morpholino interaction), histology, immunohistology, TEM, melanosome transport assay\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis places sec10 and cdc42 in same pathway, single lab\",\n      \"pmids\": [\"26024121\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Crystal structure of near-full-length zebrafish Sec10 was solved at 2.73 Å resolution, revealing tandem antiparallel helix bundles forming a straight rod, consistent with the helical architecture of other exocyst subunits.\",\n      \"method\": \"X-ray crystallography\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — atomic resolution crystal structure\",\n      \"pmids\": [\"28098232\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Sec10 downregulation in MDCK cells accelerates wound healing and ruffle formation by reducing DGK-gamma at the leading edge. Sec10 overexpression inhibits cell migration by increasing DGKγ at the leading edge; a DGK inhibitor reverses this inhibition, placing Sec10 upstream of DGKγ in the regulation of cell migration.\",\n      \"method\": \"Sec10 overexpression/knockdown in MDCK cells, wound scratch assay, DGK inhibitor treatment, immunofluorescence for DGKγ localization, in vivo I/R mouse model\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — pharmacological rescue links Sec10 to DGKγ-mediated migration, single lab\",\n      \"pmids\": [\"29326040\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Hair cell-specific deletion of Exoc5 in mice (Gfi1Cre/+;Exoc5f/f) results in progressive hair cell apoptosis with disorganized stereociliary bundles and hearing loss; deletion throughout the otic epithelium additionally causes abnormal spiral ganglion neuron neurite morphology and subsequent SGN apoptosis, demonstrating Exoc5 is required for survival of cochlear hair cells and SGNs.\",\n      \"method\": \"Conditional knockout mouse (Gfi1Cre and rAAV-iCre), auditory brainstem response, histology, immunofluorescence, apoptosis assays\",\n      \"journal\": \"Molecular neurobiology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — in vivo conditional KO with defined cellular phenotype (apoptosis, stereociliary disorganization)\",\n      \"pmids\": [\"29327200\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"RPE-specific conditional knockout of Exoc5 in mice causes RPE dysfunction (abnormal RPE65 levels, reduced c-wave amplitude), retinal thinning, and loss of visual pigments with progressive photoreceptor degeneration. In exoc5 zebrafish mutants, shorter photoreceptor outer segments and loss of melanocytes in RPE were observed, demonstrating Exoc5 is required for RPE structure and function.\",\n      \"method\": \"Conditional KO mouse (RPE-specific), electroretinography, zebrafish exoc5 mutants, histology, immunofluorescence for visual pigments\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — in vivo KO in two model systems with functional visual measurements\",\n      \"pmids\": [\"34064901\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Sec10 attenuates antiviral JAK-STAT signaling by interacting with E3 ligase STUB1, promoting STUB1-STAT1 interaction, and accelerating proteasomal degradation of STAT1 via K6-linked polyubiquitination at Lys240 and Lys652. Myeloid-specific Exoc5 knockout mice show enhanced IFN-I response and improved viral infection survival.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assays with site-specific mutants (K240R, K652R), myeloid-specific conditional KO mice, IFN signaling assays\",\n      \"journal\": \"PLoS pathogens\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — biochemical mechanism with site-specific mutagenesis, confirmed in vivo with conditional KO\",\n      \"pmids\": [\"40920886\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Sec10 negatively regulates antiviral innate immunity by inhibiting the NRF2-ATF4 axis during RNA viral infection, which suppresses ATF4-driven transcription of the RIG-I promoter, thereby reducing RIG-I expression and IFN-I response. Sec10 deficiency enhances innate immunity and reduces viral load in mice.\",\n      \"method\": \"ChIP/promoter analysis showing ATF4 binding to RIG-I promoter, Sec10 KO cells and mice, IFN signaling assays, RNA viral infection models\",\n      \"journal\": \"International journal of biological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — mechanistic pathway defined with promoter analysis and in vivo KO, single lab\",\n      \"pmids\": [\"41079927\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Oocyte-specific deletion of Exoc5 (Zp3-Exoc5-cKO) blocks folliculogenesis past the secondary follicle stage in adult waves (subsequent waves undergo apoptosis at preantral stage), while first-wave folliculogenesis proceeds to antral stage but produces developmentally incompetent oocytes. This demonstrates EXOC5 is required for follicular development and oocyte developmental competence.\",\n      \"method\": \"Conditional knockout mouse (Zp3-Cre × Exoc5 floxed), IVF, histology, superovulation\",\n      \"journal\": \"Molecular human reproduction\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — in vivo oocyte-specific KO with defined developmental phenotype and functional competence assay\",\n      \"pmids\": [\"39037927\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"EXOC5 facilitates autophagic degradation of STING1 via K63-linked polyubiquitination at Lys224 and Lys338 by E3 ligase TRIM56, with SQSTM1/p62 serving as cargo receptor, thereby suppressing cGAS-STING1-driven IFN-I antiviral signaling. Myeloid-specific Exoc5 KO mice show improved survival and reduced viral load.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assays with K63R mutants and site-specific mutations, autophagy flux assays, myeloid-specific conditional KO mice\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — biochemical mechanism with site-specific mutagenesis confirmed in vivo with conditional KO\",\n      \"pmids\": [\"41968661\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"Myeloid-specific Exoc5 deficiency reduces exosome release from macrophages, leading to intracellular accumulation of formin1, which enhances macrophage migration into the kidney. An actin disruptor and formin1 inhibitor reversed the enhanced migration phenotype, placing Exoc5-mediated exosome secretion upstream of formin1-dependent macrophage motility.\",\n      \"method\": \"LysM-Cre × Exoc5 floxed conditional KO mice, exosome quantification, formin1 localization, pharmacological inhibition (actin disruptor, formin1 inhibitor, Rac1 inhibitor), macrophage migration assays, adoptive transfer\",\n      \"journal\": \"Biomedicine & pharmacotherapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vivo conditional KO with pharmacological rescue defining formin1 as effector, single lab\",\n      \"pmids\": [\"41604889\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"Exoc5 deficiency in renal proximal tubule cells increases YAP expression and activation, and augments TGF-β-induced YAP activation and epithelial-to-mesenchymal transition, worsening kidney fibrosis following ureteral obstruction. This places Exoc5 as a negative regulator of YAP signaling in the context of renal fibrosis.\",\n      \"method\": \"Proximal tubule-specific conditional KO mouse (PEPCK-Cre), unilateral ureteral obstruction model, siRNA knockdown in HK-2 cells, Western blot for YAP/CTGF/CYR61/Pax2\",\n      \"journal\": \"Experimental & molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vivo and in vitro KO with defined molecular pathway, single lab\",\n      \"pmids\": [\"41781492\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"EXOC5/Sec10 is a central structural subunit of the octameric exocyst complex (with tandem antiparallel helix-bundle architecture) that mediates polarized exocytosis by tethering secretory vesicles to the plasma membrane; it interacts with Sec15p (via its N-terminal domain) and Sec61β at the ER, facilitates ciliary targeting of polycystin-2 and IFT proteins, regulates primary ciliogenesis and epithelial morphogenesis, controls EGFR endocytosis and MAPK/ERK signaling to protect against cell injury, and in immune contexts suppresses antiviral IFN-I responses by promoting STUB1-mediated proteasomal degradation of STAT1, TRIM56-mediated autophagic degradation of STING1, and suppression of the NRF2-ATF4-RIG-I transcriptional axis.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"EXOC5 (Sec10) is a core subunit of the octameric exocyst complex that mediates polarized vesicle trafficking, primary ciliogenesis, and innate immune regulation across diverse cell types. Structurally a tandem antiparallel helix-bundle rod, EXOC5 bridges the exocyst to cargo via its N-terminal interaction with Sec15p and engages the ER translocon subunit Sec61β, facilitating basolateral protein translocation and polarized delivery of apical cargoes such as uroplakins and ciliary proteins including polycystin-2, IFT88, and IFT20 [PMID:9658167, PMID:23037926, PMID:26046524, PMID:21490950]. Conditional knockouts in mice demonstrate essential roles in primary ciliogenesis in renal epithelia, cochlear hair cell survival, retinal pigment epithelium integrity, folliculogenesis, and urothelial differentiation [PMID:19297529, PMID:29327200, PMID:34064901, PMID:39037927]. In myeloid cells, EXOC5 suppresses antiviral type I interferon responses through three convergent mechanisms: promoting STUB1-mediated K6-linked polyubiquitination and proteasomal degradation of STAT1, facilitating TRIM56-mediated K63-linked polyubiquitination and autophagic degradation of STING1 via SQSTM1/p62, and inhibiting the NRF2–ATF4 transcriptional axis that drives RIG-I expression [PMID:40920886, PMID:41968661, PMID:41079927].\",\n  \"teleology\": [\n    {\n      \"year\": 1997,\n      \"claim\": \"Establishing that EXOC5 is the mammalian exocyst subunit answered whether the yeast Sec10p-based secretory machinery is conserved in humans and placed EXOC5 in the post-Golgi trafficking pathway.\",\n      \"evidence\": \"Cloning of human SEC10 and co-localization with Sec8p by immunofluorescence in mammalian cells\",\n      \"pmids\": [\"9119050\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No direct biochemical demonstration of complex membership in mammalian cells\", \"Functional requirement not yet tested\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Domain dissection of yeast Sec10p revealed that its N-terminus binds Sec15p to anchor the complex while its C-terminus independently directs polarized morphogenesis, establishing EXOC5 as a bifunctional scaffold within the exocyst.\",\n      \"evidence\": \"Dominant-negative overexpression of Sec10p domains, biochemical fractionation, and genetic analysis in S. cerevisiae\",\n      \"pmids\": [\"9658167\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether mammalian EXOC5 retains the same domain-function separation\", \"Identity of C-terminal binding partners\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Tissue-specific knockdown in Drosophila demonstrated that EXOC5 is selectively essential for endocrine secretion (steroid hormone release from the ring gland) rather than being universally required for all polarized exocytosis, revealing cell-type-specific dependence.\",\n      \"evidence\": \"Tissue-specific transgenic RNAi in Drosophila with ecdysone rescue\",\n      \"pmids\": [\"12453153\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether tissue-selective requirement reflects redundancy with other exocyst subunits or cargo specificity\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"The discovery that EXOC5 knockdown abolishes primary cilium axoneme formation while overexpression enhances ciliogenesis fundamentally expanded the exocyst's role beyond plasma-membrane-directed exocytosis to ciliary biogenesis.\",\n      \"evidence\": \"shRNA knockdown and overexpression in MDCK cells with electron microscopy, co-IP with Par3, 3D cyst assays, and rescue with human Sec10\",\n      \"pmids\": [\"19297529\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Which specific ciliary cargoes require exocyst-mediated delivery\", \"How Par3 interaction recruits the exocyst to the cilium base\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Identifying EXOC5 as a physical interactor of polycystin-2, IFT88, and IFT20, and showing genetic epistasis with pkd2 in zebrafish, established a molecular mechanism linking the exocyst to ciliopathy-relevant cargo trafficking and left-right body axis patterning.\",\n      \"evidence\": \"Co-immunoprecipitation, zebrafish morpholino epistasis, and MAPK activation assays\",\n      \"pmids\": [\"21490950\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether EXOC5 directly loads ciliary cargoes or acts indirectly through vesicle tethering\", \"Structural basis of EXOC5–IFT interaction\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Demonstrating that EXOC5 overexpression activates MAPK/ERK signaling and protects epithelial barriers from oxidative injury placed the exocyst upstream of a major pro-survival kinase cascade in renal cells.\",\n      \"evidence\": \"MDCK overexpression with U0126 pharmacological inhibition, transepithelial resistance after H₂O₂ treatment\",\n      \"pmids\": [\"20053792\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether MAPK activation is direct or secondary to enhanced receptor trafficking\", \"Mechanism connecting vesicle trafficking to ERK phosphorylation\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"The finding that EXOC5 binds the ER translocon subunit Sec61β and is preferentially recruited to ER membranes during basolateral protein translation extended the exocyst's function upstream from the Golgi to the ER, suggesting a role in co-translational sorting.\",\n      \"evidence\": \"GST pulldown and cell-free translation/translocation assay with ³²P-labeling\",\n      \"pmids\": [\"23037926\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether ER recruitment is physiologically rate-limiting for basolateral sorting in vivo\", \"Structural basis of EXOC5–Sec61β interaction\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Two studies in 2014 defined EXOC5's role in endosomal recycling and EGFR signaling: in C. elegans, SEC-10 maintains endosomal tubular networks for basolateral recycling of clathrin-independent cargoes, while in mammalian cells, the exocyst-EGFR interaction drives EGFR endocytosis and downstream MAPK activation that protects against kidney injury.\",\n      \"evidence\": \"C. elegans RNAi with live imaging and epistasis analysis; mammalian co-IP with pharmacological inhibition (gefitinib, Dynasore, U0126) and zebrafish AKI model\",\n      \"pmids\": [\"25301900\", \"25298525\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether EXOC5 directly tethers EGFR-containing endosomes or acts through adaptor proteins\", \"Conservation of endosomal tubule role in mammalian cells\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Conditional knockout of Exoc5 in mouse ureteric bud-derived cells, combined with MDCK cyst analyses, demonstrated that EXOC5 is essential for apical uroplakin delivery, mitotic spindle orientation, and ciliogenesis in vivo, consolidating its role in multiple axes of epithelial polarity.\",\n      \"evidence\": \"Conditional KO mouse (Ksp1.3-Cre), shRNA knockdown with rescue, EM for uroplakin plaques, spindle angle measurements, 3D cyst culture\",\n      \"pmids\": [\"26046524\", \"26040895\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular basis for spindle orientation defect\", \"Whether polarity and ciliogenesis defects are independent or sequential consequences of trafficking failure\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"The crystal structure of near-full-length zebrafish Sec10 at 2.73 Å confirmed the tandem antiparallel helix-bundle rod architecture conserved among exocyst subunits, providing the first atomic model for this subunit.\",\n      \"evidence\": \"X-ray crystallography of zebrafish Sec10\",\n      \"pmids\": [\"28098232\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No structure of EXOC5 in complex with other exocyst subunits or cargo adaptors\", \"Human EXOC5 structure not yet determined\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Hair cell-specific Exoc5 deletion causing stereociliary disorganization and progressive cochlear cell death, along with the EXOC5–DGKγ axis controlling cell migration, demonstrated that EXOC5 has non-redundant roles in sensory cell survival and wound-healing migration.\",\n      \"evidence\": \"Conditional KO mouse (Gfi1Cre) with ABR testing; MDCK wound assay with DGK inhibitor rescue\",\n      \"pmids\": [\"29327200\", \"29326040\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether stereociliary defect is secondary to ciliogenesis failure or a distinct trafficking defect\", \"Direct mechanism linking EXOC5 to DGKγ localization\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"RPE-specific Exoc5 knockout causing photoreceptor degeneration in both mice and zebrafish established EXOC5 as essential for retinal pigment epithelium function and visual cycle maintenance.\",\n      \"evidence\": \"RPE-specific conditional KO mouse, electroretinography, zebrafish exoc5 mutants with histology\",\n      \"pmids\": [\"34064901\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Which RPE cargoes require EXOC5 for trafficking\", \"Relationship between RPE EXOC5 loss and photoreceptor outer segment maintenance\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Oocyte-specific deletion showed that EXOC5 is required for folliculogenesis beyond the secondary follicle stage and for oocyte developmental competence, extending the gene's essential trafficking roles to female germ cells.\",\n      \"evidence\": \"Zp3-Cre conditional KO mouse, IVF, superovulation, histology\",\n      \"pmids\": [\"39037927\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of oocyte cargoes requiring EXOC5-dependent secretion\", \"Whether the folliculogenesis block reflects paracrine signaling failure or cell-autonomous defect\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"The identification of three convergent mechanisms by which EXOC5 suppresses antiviral IFN-I signaling—STUB1-mediated proteasomal degradation of STAT1 via K6-linked ubiquitination, TRIM56/p62-mediated autophagic degradation of STING1 via K63-linked ubiquitination, and NRF2–ATF4 axis inhibition reducing RIG-I transcription—revealed an unexpected immunomodulatory function for this trafficking subunit.\",\n      \"evidence\": \"Co-IP with ubiquitination site-specific mutants, autophagy flux assays, ChIP/promoter analysis, myeloid-specific conditional KO mice with viral challenge\",\n      \"pmids\": [\"40920886\", \"41079927\", \"41968661\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether EXOC5's immune role depends on its exocyst complex membership or is an independent moonlighting function\", \"Physiological context where immune suppression by EXOC5 is beneficial versus detrimental\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Two studies extended EXOC5's functions to exosome-regulated macrophage migration (via formin1 retention) and negative regulation of YAP signaling in renal fibrosis, broadening its role to intercellular communication and mechanotransduction pathways.\",\n      \"evidence\": \"LysM-Cre and PEPCK-Cre conditional KO mice, exosome quantification, pharmacological inhibition of formin1/Rac1, UUO fibrosis model, siRNA in HK-2 cells\",\n      \"pmids\": [\"41604889\", \"41781492\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular mechanism connecting EXOC5 to YAP expression levels\", \"Whether exosome release defect is a direct consequence of exocyst dysfunction at multivesicular bodies\", \"Independent replication needed for both formin1 and YAP pathways\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Major open questions include whether EXOC5's immunomodulatory functions are exocyst-dependent or represent moonlighting roles, the structural basis for EXOC5's interaction with diverse cargo adaptors (IFTs, EGFR, STUB1, TRIM56), and how tissue-specific trafficking requirements explain the diverse conditional knockout phenotypes across epithelia, sensory cells, immune cells, and germ cells.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No cryo-EM or crystal structure of EXOC5 in assembled exocyst complex with cargo\", \"Exocyst-independent versus exocyst-dependent functions not dissected\", \"No human genetic disease directly linked to EXOC5 mutations in the timeline\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0005198\", \"supporting_discovery_ids\": [1, 12]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [16, 19]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [0]},\n      {\"term_id\": \"GO:0005886\", \"supporting_discovery_ids\": [0, 3, 9]},\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [6]},\n      {\"term_id\": \"GO:0005768\", \"supporting_discovery_ids\": [7]},\n      {\"term_id\": \"GO:0031410\", \"supporting_discovery_ids\": [7, 8]},\n      {\"term_id\": \"GO:0005929\", \"supporting_discovery_ids\": [3, 4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5653656\", \"supporting_discovery_ids\": [0, 1, 3, 7, 9]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [19]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [5, 8, 16, 17, 21]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [16, 17, 19]},\n      {\"term_id\": \"R-HSA-1852241\", \"supporting_discovery_ids\": [3, 4, 10, 11]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [16, 19]},\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [4, 6, 9]}\n    ],\n    \"complexes\": [\n      \"Exocyst complex\"\n    ],\n    \"partners\": [\n      \"SEC15\",\n      \"SEC61B\",\n      \"PKD2\",\n      \"IFT88\",\n      \"IFT20\",\n      \"EGFR\",\n      \"STUB1\",\n      \"TRIM56\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}