| Primary Identifier | IPR064738 | Type | Domain |
| Short Name | CTNNAbd_CTNNB1 |
| description | This entry corresponds to a small region at the C terminus of CTNNB1, which is responsible for alpha-catenin binding. CTNNB1, also called beta-catenin, is a key downstream component of the canonical Wnt signalling pathway. In the absence of Wnt, it forms a complex with AXIN1, AXIN2, APC, CSNK1A1 and GSK3B that promotes phosphorylation on N-terminal Ser and Thr residues and ubiquitination of CTNNB1 via BTRC and its subsequent degradation by the proteasome. In the presence of a Wnt ligand, CTNNB1 is not ubiquitinated and accumulates in the nucleus, where it acts as a coactivator for transcription factors of the TCF/LEF family, leading to activation of Wnt-responsive genes. CTNNB1 is involved in the regulation of cell adhesion as a component of an E-cadherin:catenin adhesion complex. It acts as a negative regulator of centrosome cohesion. It is involved in the CDK2/PTPN6/CTNNB1/CEACAM1 pathway of insulin internalisation. It blocks anoikis of malignant kidney and intestinal epithelial cells and promotes their anchorage-independent growth by down-regulating DAPK2. It disrupts PML function and PML-NB formation by inhibiting RANBP2-mediated sumoylation of PML [, , , , ]. |
