id: ARBA00087037
description: 'Predicts laminin-121 trimer (GO:0005608) for proteins containing three specific CATH FunFam domains: Cadherin EGF LAG seven-pass G-type receptor (2.10.25.10:FF:000011), Laminin subunit beta 1 (2.10.25.10:FF:000065), and netrin-4 isoform X2 (2.10.25.10:FF:000333)'
status: COMPLETE
rule_type: ARBA
rule:
  rule_id: ARBA00087037
  condition_sets:
  - number: 1
    conditions:
    - condition_type: FUNFAM
      value: 2.10.25.10:FF:000011
      curie: CATH.FunFam:2.10.25.10:FF:000011
      label: Cadherin EGF LAG seven-pass G-type receptor
      negated: false
    - condition_type: FUNFAM
      value: 2.10.25.10:FF:000065
      curie: CATH.FunFam:2.10.25.10:FF:000065
      label: Laminin subunit beta 1
      negated: false
    - condition_type: FUNFAM
      value: 2.10.25.10:FF:000333
      curie: CATH.FunFam:2.10.25.10:FF:000333
      label: netrin-4 isoform X2
      negated: false
    notes: ''
    pairwise_overlap:
    - condition_a: 2.10.25.10:FF:000011
      condition_b: 2.10.25.10:FF:000065
      protein_database: SWISSPROT
      count_a: 22
      count_b: 10
      intersection_count: 8
      a_minus_b_count: 14
      b_minus_a_count: 2
      jaccard_similarity: 0.3333333333333333
      containment_a_in_b: 0.36363636363636365
      containment_b_in_a: 0.8
      interpretation: MODERATE
    - condition_a: 2.10.25.10:FF:000011
      condition_b: 2.10.25.10:FF:000333
      protein_database: SWISSPROT
      count_a: 22
      count_b: 7
      intersection_count: 4
      a_minus_b_count: 18
      b_minus_a_count: 3
      jaccard_similarity: 0.16
      containment_a_in_b: 0.18181818181818182
      containment_b_in_a: 0.5714285714285714
      interpretation: LOW
    - condition_a: 2.10.25.10:FF:000065
      condition_b: 2.10.25.10:FF:000333
      protein_database: SWISSPROT
      count_a: 10
      count_b: 7
      intersection_count: 4
      a_minus_b_count: 6
      b_minus_a_count: 3
      jaccard_similarity: 0.3076923076923077
      containment_a_in_b: 0.4
      containment_b_in_a: 0.5714285714285714
      interpretation: MODERATE
  go_annotations: []
  reviewed_protein_count: 0
  unreviewed_protein_count: 0
  created_date: ''
  modified_date: ''
  entries:
  - id: 2.10.25.10:FF:000011
    type: FUNFAM
    label: Cadherin EGF LAG seven-pass G-type receptor
    appears_in_condition_sets:
    - 1
    protein_count: 22
    related_entries:
    - relationship: PREDICTED_BY
      target_id: 2.10.25.10:FF:000065
      containment: 0.8
      jaccard_similarity: 0.333
      intersection_count: 8
      exclusive_count: 2
    - relationship: PREDICTED_BY
      target_id: 2.10.25.10:FF:000333
      containment: 0.571
      jaccard_similarity: 0.16
      intersection_count: 4
      exclusive_count: 3
    - relationship: PREDICTED_BY
      target_id: GO:0005608
      containment: 0.75
      jaccard_similarity: 0.25
      intersection_count: 6
      exclusive_count: 2
  - id: 2.10.25.10:FF:000065
    type: FUNFAM
    label: Laminin subunit beta 1
    appears_in_condition_sets:
    - 1
    protein_count: 10
    related_entries:
    - relationship: PREDICTS
      target_id: 2.10.25.10:FF:000011
      containment: 0.364
      jaccard_similarity: 0.333
      intersection_count: 8
      exclusive_count: 14
    - relationship: PREDICTED_BY
      target_id: 2.10.25.10:FF:000333
      containment: 0.571
      jaccard_similarity: 0.308
      intersection_count: 4
      exclusive_count: 3
    - relationship: PREDICTED_BY
      target_id: GO:0005608
      containment: 0.75
      jaccard_similarity: 0.5
      intersection_count: 6
      exclusive_count: 2
  - id: 2.10.25.10:FF:000333
    type: FUNFAM
    label: netrin-4 isoform X2
    appears_in_condition_sets:
    - 1
    protein_count: 7
    related_entries:
    - relationship: PREDICTS
      target_id: 2.10.25.10:FF:000011
      containment: 0.182
      jaccard_similarity: 0.16
      intersection_count: 4
      exclusive_count: 18
    - relationship: PREDICTS
      target_id: 2.10.25.10:FF:000065
      containment: 0.4
      jaccard_similarity: 0.308
      intersection_count: 4
      exclusive_count: 6
    - relationship: PREDICTS
      target_id: GO:0005608
      containment: 0.571
      jaccard_similarity: 0.364
      intersection_count: 4
      exclusive_count: 3
review_summary: 'This rule appears to be fundamentally problematic due to severe biological incoherence. It requires three disparate domain families (cadherin/G-protein receptor, laminin beta, and netrin) that have no mechanistic basis for co-occurring in laminin-121 trimers. The laminin-121 trimer is a well-defined complex composed of specific alpha1, beta2, and gamma1 chains, none of which would contain cadherin or netrin domains. The domain overlap analysis shows moderate overlaps but this likely reflects annotation artifacts rather than biological relationships. The rule predicts 0 proteins currently, suggesting it may be targeting a non-existent protein architecture.'
action: DEPRECATE
action_rationale: 'This rule should be removed because: 1) It lacks biological coherence - laminin-121 trimers are composed of specific laminin subunits (alpha1, beta2, gamma1) that would not contain cadherin or netrin domains; 2) The domain combination represents architecturally incompatible protein families; 3) Currently predicts 0 proteins, indicating the target protein architecture may not exist; 4) The cellular component annotation (laminin-121 trimer) requires proteins to be part of a specific heterotrimeric complex, which cannot be predicted solely from domain architecture; 5) Risk of false positives if proteins with these domains are incorrectly annotated as laminin trimer components.'
suggested_modifications: []
parsimony:
  assessment: OVERLY_COMPLEX
  notes: 'The rule requires three disparate domain families that have no biological justification for co-occurring in laminin-121 trimers. This represents unnecessary complexity that stems from fundamental misunderstanding of laminin structure rather than biological diversity.'
literature_support:
  assessment: CONTRADICTED
  notes: 'Well-established literature defines laminin-121 as composed of specific laminin alpha1, beta2, and gamma1 subunits. These subunits contain characteristic laminin domains (LN, LE, LG, EGF-like) but not the cadherin, netrin, or G-protein receptor domains required by this rule. The domain architecture required by this rule is inconsistent with known laminin subunit structures.'
  supported_by:
  - reference_id: 'https://www.ebi.ac.uk/QuickGO/services/ontology/go/terms/GO%3A0005608'
    supporting_text: 'A laminin complex composed of alpha1, beta2 and gamma1 polypeptide chains.'
condition_overlap:
  assessment: SIGNIFICANT
  notes: 'Analysis shows moderate overlap between domains (Jaccard similarities 0.16-0.50), with the laminin beta domain showing 80% containment in the cadherin domain and 60% overlap with GO:0005608. However, these overlaps likely reflect annotation artifacts or database cross-references rather than biologically meaningful co-occurrence of these disparate domain types.'
  supported_by:
  - reference_id: 'file:rules/arba/ARBA00087037/ARBA00087037-analysis.yaml'
    supporting_text: 'Jaccard similarities range from 0.16 to 0.50, with containment values showing laminin beta domain has 80% containment in cadherin domain (containment_b_in_a: 0.8)'
go_specificity:
  assessment: MISMATCHED
  notes: 'The GO term laminin-121 trimer (GO:0005608) is appropriately specific for a defined protein complex, but it is completely mismatched to the domain architecture this rule requires. Laminin-121 trimers have well-defined subunit composition (alpha1, beta2, gamma1) that does not include cadherin or netrin domains.'
  supported_by:
  - reference_id: 'https://www.ebi.ac.uk/QuickGO/services/ontology/go/terms/GO%3A0005608'
    supporting_text: 'A laminin complex composed of alpha1, beta2 and gamma1 polypeptide chains.'
taxonomic_scope:
  assessment: MISSING
  notes: 'The rule lacks taxonomic restrictions, but given that it currently predicts 0 proteins and targets a biologically incoherent protein architecture, taxonomic scope is not the primary concern. The rule would benefit from fundamental redesign rather than taxonomic restriction.'
  supported_by:
  - reference_id: 'file:rules/arba/ARBA00087037/ARBA00087037.enriched.json'
    supporting_text: 'reviewedProteinCount: 0, unreviewedProteinCount: 0'
confidence: 0.9
references:
- id: file:rules/arba/ARBA00087037/ARBA00087037.enriched.json
  title: ARBA00087037 enriched rule data
  findings:
  - statement: 'Rule currently predicts 0 proteins, suggesting target architecture may not exist'
- id: file:rules/arba/ARBA00087037/ARBA00087037-analysis.yaml
  title: Domain overlap quantitative analysis
  findings:
  - statement: 'Moderate domain overlaps (Jaccard 0.16-0.50) likely reflect artifacts rather than biological relationships'
- id: 'PMID:15979864'
  title: 'A simplified laminin nomenclature.'
  findings:
  - statement: 'Defines laminin-121 as composed of alpha1, beta2, gamma1 subunits'
- id: 'https://www.ebi.ac.uk/QuickGO/services/ontology/go/terms/GO%3A0005608'
  title: 'GO:0005608 laminin-121 trimer definition'
  findings:
  - statement: 'Laminin complex composed of alpha1, beta2 and gamma1 polypeptide chains'
supported_by:
- reference_id: file:rules/arba/ARBA00087037/ARBA00087037-analysis.yaml
  supporting_text: 'Analyzed 3 domain-domain pairs and 3 domain-GO pairs across entire rule. Average Jaccard similarity: 0.319. 0 pairs with >50% overlap, 0 subset relationships.'