identifier: METPO:2000008
label: uses as electron acceptor
definition: An OBJECT_PROPERTY relating an organism to a chemical entity (e.g. a CHEBI
  class) that the organism uses as the terminal electron acceptor in respiration.
  The intended use is predicate + class composition at assertion time, e.g. `<organism>
  METPO:2000008 CHEBI:17632` ("organism uses nitrate as electron acceptor").
definition_source: DOI:10.1146/annurev.micro.61.080706.093130
trait_category: METABOLISM
term_kind: OBJECT_PROPERTY
mapping_status: REVIEWED
parent_traits:
- METPO:2000001
synonyms:
- synonym_text: electron acceptor
  synonym_type: RELATED_SYNONYM
  source: metpo.owl
domain: https://w3id.org/metpo/1000525
range_: http://purl.obolibrary.org/obo/CHEBI_24431
xrefs:
- MICRO:0001463
evidence:
- reference: DOI:10.1146/annurev.micro.61.080706.093130
  snippet: terminal electron acceptor
  notes: Microbial-physiology review supports the "electron acceptor" relation as
    the standard descriptor for the terminal-acceptor pole of respiration; composed
    at assertion time with the specific acceptor chemical (O2, nitrate, sulfate, Fe(III),
    CO2, etc.).
curation_history:
- timestamp: '2026-05-05T01:35:46.953476+00:00'
  curator: seed_from_metpo
  action: SEEDED_FROM_METPO
  changes: imported from data/raw/metpo.owl (OBJECT_PROPERTY)
  llm_assisted: false
- timestamp: '2026-05-10T00:00:00-07:00'
  curator: codex
  action: DEPRECATED_PROPERTY_RECORD
  changes: Deprecated generic chemical-use relation carrier; later replacement should
    use more specific trait records that combine the relation with the chemical, metabolic
    role, growth condition, and positive or negative usage context.
  llm_assisted: true
- timestamp: '2026-05-16T08:00:00-07:00'
  curator: claude
  action: UNDEPRECATED_AS_COMPOSITION_PRIMITIVE
  changes: Restored from DEPRECATED to REVIEWED. METPO modeling uses the predicate
    + class composition pattern (this OBJECT_PROPERTY composed with a CHEBI electron-acceptor
    chemical at assertion time) rather than precomposed substrate-specific TraitRecords.
    Added DOI-backed definition and evidence.
  llm_assisted: true
- timestamp: '2026-05-17T10:00:00-07:00'
  curator: claude
  action: ADDED_EXTERNAL_PREDICATE_XREF
  changes: 'Added xrefs [''MICRO:0001463''] to record an external equivalence predicate
    (MICRO:0001463 ''uses electron acceptor''). MICRO:0001463 ''uses electron acceptor''
    is the direct equivalent. Source: OLS4 property search.'
  llm_assisted: true