id: A0A097A0C1
gene_symbol: blaOXA-400
product_type: PROTEIN
status: DRAFT
taxon:
  id: NCBITaxon:470
  label: Acinetobacter baumannii
description: blaOXA-400 encodes an OXA/class D beta-lactamase in Acinetobacter baumannii. UniProt/CARD identify this entry as a beta-lactamase antibiotic-inactivation determinant; the expected core molecular function is beta-lactamase activity, not merely penicillin binding. UniProt names the protein 'Beta-lactamase OXA-400' (accession A0A097A0C1).
existing_annotations:
- term:
    id: GO:0008658
    label: penicillin binding
  evidence_type: IEA
  original_reference_id: GO_REF:0000002
  qualifier: enables
  review:
    summary: The existing MF term is directionally correct but less informative than the family-specific AMR activity beta-lactamase activity.
    action: MODIFY
    reason: Replace the broad or over-specific electronic term 'penicillin binding' with beta-lactamase activity based on UniProt/CARD determinant identity and the curated ARO->GO mapping.
    proposed_replacement_terms:
    - id: GO:0008800
      label: beta-lactamase activity
    supported_by:
    - reference_id: file:genes/ACIBA/blaOXA-400/blaOXA-400-uniprot.txt
      supporting_text: DR   CARD; ARO:3001586; OXA-400; ARO:0001004; antibiotic inactivation.
- term:
    id: GO:0008800
    label: beta-lactamase activity
  evidence_type: RCA
  original_reference_id: file:projects/ANTIMICROBIAL_RESISTANCE/aro2go.sssom.yaml
  qualifier: enables
  review:
    summary: 'NEW candidate annotation from the curated ARO->GO mapping: beta-lactamase activity.'
    action: NEW
    reason: The UniProt record cross-references a CARD/ARO AMR determinant, and the curated ARO->GO mapping projects the family-specific molecular function beta-lactamase activity. This focused draft accepts the candidate as a curator lead for this AMR determinant.
    additional_reference_ids:
    - file:projects/ANTIMICROBIAL_RESISTANCE/data/candidate_new_annotations.tsv
    - file:genes/ACIBA/blaOXA-400/blaOXA-400-uniprot.txt
    supported_by:
    - reference_id: file:projects/ANTIMICROBIAL_RESISTANCE/data/candidate_new_annotations.tsv
      supporting_text: "A0A097A0C1\tARO:3001586\tARO:3000001\tnarrower\tRO:0002327\tGO:0008800\tbeta-lactamase activity"
    - reference_id: file:genes/ACIBA/blaOXA-400/blaOXA-400-uniprot.txt
      supporting_text: DR   CARD; ARO:3001586; OXA-400; ARO:0001004; antibiotic inactivation.
- term:
    id: GO:0046677
    label: response to antibiotic
  evidence_type: RCA
  original_reference_id: file:projects/ANTIMICROBIAL_RESISTANCE/aro2go.sssom.yaml
  qualifier: involved_in
  review:
    summary: 'NEW process annotation: blaOXA-400 is an AMR determinant involved in antibiotic response/resistance.'
    action: NEW
    reason: CARD/ARO identity places this gene in an antimicrobial-resistance determinant family; response to antibiotic is the appropriate high-level GO biological process for the resistance role.
    additional_reference_ids:
    - file:genes/ACIBA/blaOXA-400/blaOXA-400-uniprot.txt
    supported_by:
    - reference_id: file:genes/ACIBA/blaOXA-400/blaOXA-400-uniprot.txt
      supporting_text: DR   CARD; ARO:3001586; OXA-400; ARO:0001004; antibiotic inactivation.
references:
- id: GO_REF:0000002
  title: Gene Ontology annotation through association of InterPro records with GO terms
  findings: []
- id: file:genes/ACIBA/blaOXA-400/blaOXA-400-uniprot.txt
  title: UniProt flat file for blaOXA-400 (A0A097A0C1)
  findings:
  - statement: UniProt/CARD identity and protein naming for blaOXA-400.
    supporting_text: DR   CARD; ARO:3001586; OXA-400; ARO:0001004; antibiotic inactivation.
- id: file:projects/ANTIMICROBIAL_RESISTANCE/aro2go.sssom.yaml
  title: Curated ARO to GO mapping set for AMR gene families
  findings:
  - statement: Manual ARO-to-GO mappings used to identify focused AMR annotation gains.
    supporting_text: 'mapping_set_title: ARO to GO mapping (AMR gene families and resistance mechanisms)'
- id: file:projects/ANTIMICROBIAL_RESISTANCE/data/candidate_new_annotations.tsv
  title: Annotation-gain candidates from ARO to GO mappings
  findings:
  - statement: Candidate GO annotations projected from the ARO-to-GO mapping set.
    supporting_text: Candidate GO annotations that UniProtKB entries with a CARD cross-reference would gain from the
core_functions:
- description: blaOXA-400 hydrolyzes beta-lactam antibiotics as an OXA/class D beta-lactamase, contributing to antibiotic resistance.
  molecular_function:
    id: GO:0008800
    label: beta-lactamase activity
  directly_involved_in:
  - id: GO:0046677
    label: response to antibiotic
  supported_by:
  - reference_id: file:genes/ACIBA/blaOXA-400/blaOXA-400-uniprot.txt
    supporting_text: DR   CARD; ARO:3001586; OXA-400; ARO:0001004; antibiotic inactivation.
suggested_questions:
- question: Is the ARO-derived beta-lactamase activity annotation sufficiently specific for blaOXA-400, or is a narrower substrate/site-specific GO term warranted?
  experts: []
suggested_experiments:
- description: Biochemically assay purified blaOXA-400 against representative antibiotic substrates for the inferred AMR family and measure loss of drug activity or target modification.
  experiment_type: in vitro enzyme assay