{"id":"d804b8ed-c5e1-5d29-8bc0-ae735ab50a5d","stable_key":"548ab9d6-3a9b-5bed-879c-17d03813b636:transport-flad1-s495del-binding","predicate":"reduces-binding-of","statement":"Recombinant FADS2 carrying p.Ser495del retained less bound flavin than wild-type FADS2.","claim_class":"mechanistic","status":"source_derived_draft","evidence_grade":"ungraded","direction":"negative","is_public":true,"mechanism_event_id":"b39f0932-aa58-527c-b3d0-184366ad2dfa","mechanism_event_label":"This FLAD1 variant retains bound FAD less effectively.","subject":{"id":"043a308c-1d5b-5003-8c9f-6e1acd588ac3","slug":"flad1-s495del","display_name":"FLAD1 p.Ser495del variant","entity_type_key":"protein_state"},"object":{"id":"e2cd7179-f218-54e8-9ce9-7a836ae35fac","slug":"fad","display_name":"FAD","entity_type_key":"small_molecule"},"evidence_count":1,"mechanism_event":{"id":"b39f0932-aa58-527c-b3d0-184366ad2dfa","stable_key":"548ab9d6-3a9b-5bed-879c-17d03813b636:transport-flad1-s495del-binding-event","event_type":"biochemical_relationship","label":"This FLAD1 variant retains bound FAD less effectively.","description":"Recombinant FADS2 carrying p.Ser495del retained less bound flavin than wild-type FADS2.","status":"provisional","compartment":null,"participants":[{"entity":{"id":"043a308c-1d5b-5003-8c9f-6e1acd588ac3","slug":"flad1-s495del","display_name":"FLAD1 p.Ser495del variant","entity_type_key":"protein_state"},"role":"variant-protein","stoichiometry":null,"state_label":"","sequence_order":0,"notes":""},{"entity":{"id":"e2cd7179-f218-54e8-9ce9-7a836ae35fac","slug":"fad","display_name":"FAD","entity_type_key":"small_molecule"},"role":"bound-product","stoichiometry":null,"state_label":"","sequence_order":1,"notes":""}]},"contexts":[{"dimension":"availability_state","value_text":"machinery_impairment","comparator":null,"unit":null,"notes":"Imported condition classification; unverified.","entity":null},{"dimension":"evidence_location","value_text":"Figure 4B","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"experimental_model","value_text":"Purified recombinant human FADS2 variant","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"exposure","value_text":"Wild-type versus variant purified enzyme.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"limitations","value_text":"Variant numbering follows FADS1; this is not a finding for all FLAD1 variants.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"nutrient_topic","value_text":"Riboflavin research collection; topical membership is not evidence of a direct dietary effect.","comparator":null,"unit":null,"notes":"","entity":{"slug":"riboflavin","display_name":"Riboflavin (vitamin B2)","entity_type_key":"small_molecule"}},{"dimension":"organism","value_text":"Homo sapiens protein","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"plain_language","value_text":"This FLAD1 variant retains bound FAD less effectively.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"primary_references","value_text":"[transport-flad1-disease-2016] Riboflavin-Responsive and -Non-responsive Mutations in FAD Synthase Cause Multiple Acyl-CoA Dehydrogenase and Combined Respiratory-Chain Deficiency (2016). https://pmc.ncbi.nlm.nih.gov/articles/PMC4908180/ DOI: 10.1016/j.ajhg.2016.04.006","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"tissue_or_cell_type","value_text":"Purified protein","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"trigger_kind","value_text":"machinery_impairment","comparator":null,"unit":null,"notes":"Imported condition classification; 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Study references: [transport-flad1-disease-2016] Riboflavin-Responsive and -Non-responsive Mutations in FAD Synthase Cause Multiple Acyl-CoA Dehydrogenase and Combined Respiratory-Chain Deficiency (2016). https://pmc.ncbi.nlm.nih.gov/articles/PMC4908180/ DOI: 10.1016/j.ajhg.2016.04.006","relationship":"supports","weight":1.0,"link_notes":"","source":{"id":"4f7c9578-82bf-5e2d-b5c4-72a79fb4f6af","stable_key":"import-548ab9d6-3a9b-5bed-879c-17d03813b636","title":"Riboflavin: mechanisms, deficiency and nutrient interactions (2026-09-17)","document_type":"imported_text","citation_label":"AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text.","file_path":"","sha256":"680cb6bc8249877f2410f551807f10d390fdd719014137d7414ba3420e29228d","revision_id":"7a61e299-908d-5372-860b-99ed190f9d7a","review_status":"unverified_draft","notes":""}}],"relations":[],"conflicts":[],"corrections":[],"research":null}