ARBA00090047

id: ARBA00090047
description: 'This rule annotates proteins containing the SepA cytokinesis protein domain (CATH FunFam 1.20.58.2220:FF:000006) in Taphrinomycotina fungi with the highly specific GO term GO:1904498 (protein localization to mitotic actomyosin contractile ring). The rule targets a well-characterized cytokinesis regulator but applies an extremely specific localization annotation that requires strong experimental validation.'
status: COMPLETE
rule_type: ARBA
rule:
  rule_id: ARBA00090047
  condition_sets:
  - number: 1
    conditions:
    - condition_type: FUNFAM
      value: 1.20.58.2220:FF:000006
      curie: CATH.FunFam:1.20.58.2220:FF:000006
      label: Cytokinesis protein sepA
      negated: false
    - condition_type: TAXON
      value: Taphrinomycotina
      curie: NCBITaxon:451866
      label: Taphrinomycotina
      negated: false
    notes: ''
  go_annotations: []
  reviewed_protein_count: 0
  unreviewed_protein_count: 0
  created_date: ''
  modified_date: ''
  entries:
  - id: 1.20.58.2220:FF:000006
    type: FUNFAM
    label: Cytokinesis protein sepA
    appears_in_condition_sets:
    - 1
review_summary: 'ARBA00090047 is a well-designed rule that correctly identifies SepA cytokinesis proteins in fungi through a specific CATH FunFam and appropriate taxonomic restriction to Taphrinomycotina. The rule demonstrates good biological understanding and parsimony with a single, mechanistically coherent condition set. However, it suffers from GO term over-specificity: GO:1904498 (protein localization to mitotic actomyosin contractile ring) makes a very precise claim about protein localization that requires experimental validation. While SepA proteins are established cytokinesis regulators, the evidence for their specific localization TO the contractile ring (versus regulation OF contractile ring assembly) is unclear. The rule would benefit from a broader, more defensible cytokinesis-related GO term.'
action: MODIFY
action_rationale: 'While the rule correctly identifies SepA as a cytokinesis regulator in fungi, the GO term GO:1904498 is overly specific. SepA proteins are known to be involved in cytokinesis and may regulate contractile ring assembly, but the specific annotation "protein localization to mitotic actomyosin contractile ring" requires strong experimental evidence that SepA proteins themselves localize TO the contractile ring. A broader cytokinesis-related term such as GO:0000281 (mitotic cytokinesis) or GO:0000915 (actomyosin contractile ring assembly) would be more appropriate based on current knowledge.'
suggested_modifications:
- 'Replace GO:1904498 with GO:0000281 (mitotic cytokinesis) or GO:0000915 (actomyosin contractile ring assembly)'
- 'Consider adding molecular function annotation such as GO:0032147 (activation of protein kinase activity) if SepA acts as a kinase regulator'
- 'Verify that all proteins in the FunFam are indeed involved in cytokinesis regulation across Taphrinomycotina'
parsimony:
  assessment: PARSIMONIOUS
  notes: 'The rule is optimally designed with a single condition set containing only two conditions: one specific CATH FunFam for SepA proteins and one taxonomic restriction to Taphrinomycotina. This represents the minimal necessary complexity to achieve the biological specificity required. No redundancy or unnecessary conditions are present.'
literature_support:
  assessment: MODERATE
  notes: 'SepA proteins are well-established cytokinesis regulators in fungi, particularly in Schizosaccharomyces pombe. However, literature support for the specific GO term GO:1904498 (protein localization to mitotic actomyosin contractile ring) is limited. Most studies demonstrate SepA involvement in cytokinesis regulation rather than specific localization to contractile rings.'
  supported_by:
  - reference_id: file:rules/arba/ARBA00090047/ARBA00090047-deep-research-manual.md
    supporting_text: 'In S. pombe, SepA has been studied as a cytokinesis regulator. Key findings include: Essential for proper cell division, Localization to division sites during cytokinesis, Interaction with contractile ring components'
condition_overlap:
  assessment: NONE
  notes: 'The rule contains only a single condition set with one domain condition, so there are no opportunities for overlap. The analysis confirms "Only 1 domain condition(s) in entire rule" with no pairwise comparisons possible.'
  supported_by:
  - reference_id: file:rules/arba/ARBA00090047/ARBA00090047-analysis.yaml
    supporting_text: 'Only 1 domain condition(s) in entire rule'
go_specificity:
  assessment: TOO_NARROW
  notes: 'GO:1904498 (protein localization to mitotic actomyosin contractile ring) is overly specific for the available evidence. While SepA proteins are known cytokinesis regulators, the specific claim that they localize TO the contractile ring requires detailed experimental validation. Broader terms like GO:0000281 (mitotic cytokinesis) or GO:0000915 (actomyosin contractile ring assembly) would be more appropriate.'
  supported_by:
  - reference_id: file:rules/arba/ARBA00090047/ARBA00090047-deep-research-manual.md
    supporting_text: 'GO:1904498 describes a very specific aspect of cytokinesis - the localization of proteins TO the contractile ring. This is distinct from: Contractile ring assembly (GO:0000915), Contractile ring contraction (GO:0061180), General cytokinesis regulation'
taxonomic_scope:
  assessment: APPROPRIATE
  notes: 'The restriction to Taphrinomycotina (subphylum of Ascomycota fungi) is well-justified. SepA proteins are well-characterized in fungi, especially Schizosaccharomyces pombe, and cytokinesis mechanisms can vary significantly between kingdoms. This taxonomic scope appropriately limits annotations to organisms where the SepA protein function is established.'
  supported_by:
  - reference_id: file:rules/arba/ARBA00090047/ARBA00090047-deep-research-manual.md
    supporting_text: 'This restriction suggests the rule is specifically targeting fungal SepA proteins, which is biologically reasonable given that: 1. SepA proteins are well-characterized in fungi, especially S. pombe 2. Cytokinesis mechanisms can vary significantly between kingdoms 3. The contractile ring structure and its regulation may differ between fungal and other systems'
confidence: 0.7
references:
- id: file:rules/arba/ARBA00090047/ARBA00090047-deep-research-manual.md
  title: Manual deep research analysis of SepA proteins and cytokinesis
  findings:
  - statement: 'SepA proteins are well-characterized cytokinesis regulators, particularly in Schizosaccharomyces pombe'
  - statement: 'GO:1904498 is extremely specific and requires experimental evidence for protein localization TO contractile rings'
  - statement: 'Taxonomic restriction to Taphrinomycotina is appropriate given known SepA distribution in fungi'
  - statement: 'Rule represents novel annotation not covered by InterPro2GO'
supported_by:
- reference_id: file:rules/arba/ARBA00090047/ARBA00090047-analysis.yaml
  supporting_text: 'No redundant annotations. 1 novel annotation(s) not in ipr2go.'