AFAP1L2

UniProt ID: A0A9L0RQI4
Organism: Equus caballus
Review Status: IN PROGRESS
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Gene Description

AFAP1L2 is a conserved cytoplasmic signaling adaptor with an AFAP-family architecture. Its horse sequence retains the full span of the human protein, supporting a conserved role in organizing Src-related signaling and kinase activation. Downstream effects on transcription, proliferation and cytokine production are inferred from characterized mammalian epithelial-cell systems and depend on signaling context.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0005737 cytoplasm
IEA
GO_REF:0000044
ACCEPT
Summary: The horse AFAP1L2 protein is inferred to act in the cytoplasm.
Reason: AFAP family architecture and alignment covering the entire human protein support transfer of the characterized cytoplasmic adaptor role. This inference is grounded in the primary Src-signaling experiments rather than the automated location mapping alone.
Supporting Evidence:
file:human/AFAP1L2/AFAP1L2-uniprot.txt
CC -!- SUBCELLULAR LOCATION: Cytoplasm
file:HORSE/AFAP1L2/AFAP1L2-uniprot.txt
DR InterPro; IPR030113; AFAP.
file:HORSE/AFAP1L2/AFAP1L2-bioinformatics/RESULTS.md
share 88.6% identity among 818 paired residues.
PMID:17412687
Their co-expression in COS-7 cells resulted in activation of c-Src and elevated tyrosine phosphorylation of multiple proteins, including XB130 itself.

Core Functions

Promotes Src-family kinase activation as a cytoplasmic signaling adaptor.

Cellular Locations:
Supporting Evidence:
  • PMID:17412687
    Their co-expression in COS-7 cells resulted in activation of c-Src and elevated tyrosine phosphorylation of multiple proteins, including XB130 itself.
  • PMID:17412687
    Down-regulation of endogenous XB130 with siRNA reduced c-Src activity, IL-8 production, EGF-induced phosphorylation of Akt and GSK3beta, and altered cell cycles in human lung epithelial cells.
  • file:HORSE/AFAP1L2/AFAP1L2-uniprot.txt
    DR InterPro; IPR030113; AFAP.
  • file:HORSE/AFAP1L2/AFAP1L2-bioinformatics/RESULTS.md
    share 88.6% identity among 818 paired residues.

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 · AFAP1L2-protnlm-predictions-review.yaml · Review status: COMPLETE

The nine predictions are supported as conserved adaptor-mediated signaling functions or downstream processes, with cytokine and proliferation effects interpreted in their experimental cellular contexts.

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/AFAP1L2.json

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

GO:0032675 regulation of interleukin-6 production GO_BP
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. The primary human airway-cell experiment reports reduced IL-6 after XB130 siRNA. Conservation of the signaling adaptor supports this general regulatory participation; it does not establish identical effect size or expression across horse tissues. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0045893 positive regulation of DNA-templated transcription GO_BP
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. Human XB130 enhances Src-dependent SRE/AP-1 transcription. This supports conserved upstream positive regulation, without implying that AFAP1L2 is a DNA-binding transcription factor. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0007346 regulation of mitotic cell cycle GO_BP
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. XB130 knockdown alters human epithelial cell-cycle progression downstream of growth-factor signaling. This supports a conserved regulatory contribution, not intrinsic cell-cycle catalysis. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0030296 protein tyrosine kinase activator activity GO_MF
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. The human protein activates Src and depletion reduces endogenous Src activity. Conserved adaptor architecture supports kinase-activator activity rather than kinase activity. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0032757 positive regulation of interleukin-8 production GO_BP
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. Human airway-cell knockdown lowers IL-8 production. The horse inference concerns a conserved signaling contribution to cytokine output and remains tissue/context dependent. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0042169 SH2 domain binding GO_MF
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. The human N-terminal motif-rich region supports SH2-mediated interaction and Src signaling. Retention of the human-length sequence and adaptor architecture supports transfer, rather than assigning an SH2 domain to AFAP1L2. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0017124 SH3 domain binding GO_MF
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. The human N-terminal SH3-binding region mediates signaling interactions. This molecular binding role is consistent with the conserved horse adaptor. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0006954 inflammatory response GO_BP
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. Primary human cytokine-response experiments establish a contribution to inflammatory signaling. This is a broad, context-dependent biological process, not a claim of universal proinflammatory action. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:
GO:0045742 positive regulation of epidermal growth factor receptor signaling pathway GO_BP
COR — Correct novel prediction Review score: 2/2
Prediction method: ProtNLM2 · Version: UniProt API snapshot 2026-09-08
Review rationale: The selected horse AFAP1L2 aligns across all 818 human residues with 88.6% identity among paired positions and retains its AFAP-family architecture. Human depletion reduces EGF-induced Akt/GSK3beta phosphorylation, supporting a conserved positive contribution to EGFR downstream signaling through the adaptor. The claim is new relative to the frozen horse GOA; the model training membership is unknown.
Supporting Evidence:

📚 Additional Documentation

Notes

(AFAP1L2-notes.md)

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Bioinformatics Results

(RESULTS.md)

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📄 View Raw YAML

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