CTNNA1 (Catenin alpha-1) variants and mutations

CTNNA1 (also known as Catenin alpha-1) is a human protein-coding gene encoding a catenin alpha-1 protein. It links cadherin-catenin adhesion complexes to the actin cytoskeleton and helps maintain epithelial integrity and tissue architecture. Germline loss-of-function variants can predispose to diffuse gastric cancer, while biallelic variants can cause severe epithelial and skin disease. This analysis covers 1,761 CTNNA1 variants and mutations. Of these, 70% have computational variant effect predictions. Disease context includes Butterfly-shaped pigment dystrophy, Inherited cancer-predisposing syndrome, and hereditary neoplastic syndrome. Example CTNNA1 variants include M1?, M1T, and M1V.

Variant analysis overview

Variant and mutation evidence

Clinical, disease, and population context

Protein structure and variant hotspots

Data sources

Evidence in this analysis draws on EBI Proteins Variation, UniProt, gnomAD v4, EuropePMC, 3D Hotspot Analysis, Interaction Network Analysis, Protein Data Bank, AlphaFold DB, gnomAD constraint, Open Targets, ClinGen, MaveDB, LitVar.

Notable CTNNA1 variants

Examples include M1?, M1T, M1V, T2A, T2M, T2P, T2S, T2T. Listed records include available protein-change notation, database identifiers, clinical classifications, computational predictions, population evidence, experimental measurements, and disease context.