identifier: traitmech:000127
label: hydrogenotrophic methanogenesis
definition: A methanogenesis in which carbon dioxide is reduced to methane using molecular
  hydrogen as the electron donor.
definition_source: DOI:10.1126/science.aaf4507
trait_category: METABOLISM
term_kind: CLASS
mapping_status: PROPOSED
parent_traits:
- METPO:1000844
synonyms:
- synonym_text: hydrogenotrophic_methanogenesis
  synonym_type: RELATED_SYNONYM
  source: DOI:10.1126/science.aaf4507
- synonym_text: methanogenesis_by_CO2_reduction_with_H2
  synonym_type: RELATED_SYNONYM
  source: DOI:10.1126/science.aaf4507
evidence:
- reference: DOI:10.1146/annurev-micro-011720-122807
  snippet: from CO2 and H2 to methane
  notes: Shima et al. support the H2/CO2 branch of archaeal methane production.
curation_history:
- timestamp: '2026-09-08T00:00:00Z'
  curator: codex
  action: PROPOSED_FROM_RESEARCH
  changes: Proposed a DOI-backed FAPROTAX metabolic capability from proposals/metpo_traitmech_v11
    after repository-wide duplicate review.
  llm_assisted: true