{"id":"4eff54a0-9f38-5295-abfe-005678e07320","stable_key":"tcr-produces-ip3","predicate":"produces","statement":"TCR signaling produces IP3 through the source-described receptor-proximal cascade.","claim_class":"mechanistic","status":"source_derived_draft","evidence_grade":"supplied_source_only","direction":"positive","is_public":true,"mechanism_event_id":"d6cdab6f-dc76-5bd6-a385-7eaa957926fc","mechanism_event_label":"TCR signaling produces IP3","subject":{"id":"2fd7a636-28ba-5453-ad77-c1fc7e75aa93","slug":"tcr-signaling","display_name":"TCR signaling","entity_type_key":"cellular_process"},"object":{"id":"7005bbc2-d4b5-5903-b776-94dd2288d35f","slug":"ip3","display_name":"IP3","entity_type_key":"small_molecule"},"evidence_count":1,"mechanism_event":{"id":"d6cdab6f-dc76-5bd6-a385-7eaa957926fc","stable_key":"tcr-produces-ip3","event_type":"second_messenger_generation","label":"TCR signaling produces IP3","description":"The source compresses the receptor-proximal cascade into IP3 production.","status":"provisional","compartment":{"slug":"t-cell","display_name":"T cell"},"participants":[{"entity":{"id":"2fd7a636-28ba-5453-ad77-c1fc7e75aa93","slug":"tcr-signaling","display_name":"TCR signaling","entity_type_key":"cellular_process"},"role":"upstream_process","stoichiometry":null,"state_label":"","sequence_order":1,"notes":""},{"entity":{"id":"7005bbc2-d4b5-5903-b776-94dd2288d35f","slug":"ip3","display_name":"IP3","entity_type_key":"small_molecule"},"role":"product","stoichiometry":null,"state_label":"","sequence_order":2,"notes":""}]},"contexts":[{"dimension":"cell_type","value_text":null,"comparator":null,"unit":null,"notes":"","entity":{"slug":"t-cell","display_name":"T cell","entity_type_key":"cell_type"}},{"dimension":"evidence_scope","value_text":"Source-derived draft; primary-source verification required","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"organism","value_text":null,"comparator":null,"unit":null,"notes":"","entity":{"slug":"human","display_name":"Human","entity_type_key":"organism"}}],"evidence":[{"id":"682efd0c-f573-5577-8bfa-e1184c3cfbd4","evidence_kind":"source_passage","locator":"lines 30-38","start_line":30,"end_line":38,"excerpt":"5.  TCR → LCK → ZAP70 → LAT → PLCγ1 → PIP₂ → IP₃ + DAG\n\n6.  IP₃ → IP3R → ER Ca²⁺ release → store depletion\n\n7.  STIM1 oligomerizes → ORAI1 → CRAC channel → sustained Ca²⁺ entry\n\n8.  Ca²⁺/calmodulin → CALCINEURIN (PP2B) → dephosphorylates NFAT\n\n9.  NFAT → nucleus → partners with AP-1 → IL2, IFNG, CD25 transcription","model_system":"Source draft; model details require primary-source verification","directness":"reported_statement","verification_status":"source_derived_draft","notes":"TCR, IP3R, calcium, STIM1, ORAI1, calcineurin, NFAT, AP-1, and IL2 chain.","relationship":"supports","weight":1.0,"link_notes":"Passage support from supplied draft; not yet primary-source verified.","source":{"id":"221ea31f-3a75-5504-807d-e2ed46042b76","stable_key":"immune","title":"Selenium in immune cells","document_type":"user_supplied_markdown","citation_label":"Selenium immune-cell mechanism draft","file_path":"X:\\metabolic-ledger\\source_material\\selenium-immune-cells.md","sha256":"ad9305d9eea8566ba3197141c325d2d9a921fc4ee3d3466f211c792c16cded70","revision_id":"fbed30e0-1c0d-5b83-8a1f-2867fbe8a5b5","review_status":"unverified_draft","notes":"Retained as supplied source material. Primary literature verification is still required."}}],"relations":[],"conflicts":[],"corrections":[],"research":null}