WDPCP

UniProt ID: A0A3Q2KRK8
Organism: Equus caballus
Review Status: IN PROGRESS
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Gene Description

WDPCP is a conserved CPLANE-family ciliary and cytoskeletal scaffold. Its retained WD40 and alpha-solenoid architecture supports roles at the ciliary base and in actin organization. The horse protein has a shorter N terminus consistent with mammalian variation and a small deletion in the phosphoinositide-binding tail whose effect on lipid affinity is unresolved.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0005886 plasma membrane
IEA
GO_REF:0000044
ACCEPT
Summary: A peripheral membrane-associated WDPCP pool is supported.
Reason: The conserved scaffold and experimentally characterized actin/focal-adhesion localization support the broad membrane assignment. The small tail deletion leaves precise phosphoinositide affinity uncertain without negating peripheral localization.
Supporting Evidence:
PMID:24302887
Wdpcp is also found in the cytoplasm, where it is localized in the actin cytoskeleton and in focal adhesions.
file:HORSE/WDPCP/WDPCP-bioinformatics/RESULTS.md
share 88.1% identity among 704 paired residues.
file:HORSE/WDPCP/WDPCP-bioinformatics/RESULTS.md
The WD40/alpha-solenoid scaffold is extensively conserved, supporting broad ciliary and cytoskeletal roles.
GO:0005930 axoneme
IEA
GO_REF:0000044
UNDECIDED
Summary: Ciliary-base localization is supported more clearly than axonemal shaft localization.
Reason: The mammalian evidence places WDPCP at the transition zone. Conservation supports ciliary participation but does not independently resolve the exact axoneme annotation.
Supporting Evidence:
PMID:24302887
Wdpcp is localized to the transition zone
file:HORSE/WDPCP/WDPCP-bioinformatics/RESULTS.md
share 88.1% identity among 704 paired residues.

Core Functions

Conserved scaffold supporting ciliary and actin-cytoskeletal organization; precise lipid affinity remains untested.

Directly Involved In:
Supporting Evidence:
  • PMID:24302887
    Wdpcp is localized to the transition zone
  • PMID:24302887
    in Wdpcp-deficient cells, Sept2 was lost from the actin cytoskeleton, suggesting Wdpcp is required for Sept2 recruitment to actin filaments.
  • file:HORSE/WDPCP/WDPCP-bioinformatics/RESULTS.md
    share 88.1% identity among 704 paired residues.
  • file:HORSE/WDPCP/WDPCP-bioinformatics/RESULTS.md
    The WD40/alpha-solenoid scaffold is extensively conserved, supporting broad ciliary and cytoskeletal roles.

References

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External Prediction Reviews

These computational predictions are reviewed separately from the GOA annotation set used for this review. The assessments below are from this project and do not constitute official GO annotations or endorsement by GO/UniProt. They are not included in the existing annotation review above.

ProtNLM2 External predictions

View prediction review YAML · WDPCP-protnlm-predictions-review.yaml · Review status: COMPLETE

Broad ciliary and cytoskeletal roles are supported by mammalian experiments and the conserved horse scaffold.

Source documents: projects/PROTNLM_EVALUATION/mammal-benchmark/horse40-predictions.csv · projects/PROTNLM_EVALUATION/mammal-benchmark/predictions.jsonl.gz · projects/PROTNLM_EVALUATION/mammal-benchmark/paired-sequences/WDPCP.json · genes/HORSE/WDPCP/WDPCP-hypotheses/horse40-cell-projection-organization/openscientist.md

Review score: 2 = concordant with evidence; 1 = uncertain; 0 = discordant with evidence. This is an assessment score, not a model probability.

GO:0030030 cell projection organization GO_BP
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: Wdpcp loss disrupts cilia and actin-based protrusive behavior. Conservation of the WD40/alpha-solenoid scaffold supports the broad cell-projection-organization prediction; the OpenScientist 83% identity estimate and cached 88.1% identity over 704 paired residues reflect different alignment scopes but the same WDPCP orthology. The N-terminal length difference resembles known human–mouse variation; a short lipid-binding-tail deletion leaves affinity, not this entire broad role, unresolved. More specific children such as cilium assembly and establishment of planar polarity are better supported, and any horse assignment should use ISS/ISO rather than experimental evidence.
Supporting Evidence:
GO:0005737 cytoplasm GO_CC
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: Mouse imaging directly detects a cytoplasmic WDPCP pool on actin and focal adhesions. The conserved horse architecture supports this localization independently of electronic annotation agreement.
Supporting Evidence:
GO:0005929 cilium GO_CC
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: Transition-zone localization places WDPCP at the ciliary base. Conserved horse scaffold architecture supports this broad cilium location; it does not establish axonemal shaft localization.
Supporting Evidence:
GO:0005856 cytoskeleton GO_CC
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: Wdpcp localizes to the actin cytoskeleton and recruits Sept2. The conserved horse scaffold supports a cytoskeletal pool, without requiring it to be an actin motor or a tubulin polymerization enzyme.
Supporting Evidence:

Deep Research

OpenScientist

(WDPCP-hypotheses/horse40-cell-projection-organization/openscientist.md)

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📚 Additional Documentation

Notes

(WDPCP-notes.md)

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Bioinformatics Results

(RESULTS.md)

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đź“„ View Raw YAML

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