| Post Translational Modifications | Phosphorylation and dephosphorylation of AXIN1 regulates assembly and function of the beta-catenin complex. Phosphorylated by CK1 and GSK3B. Dephosphorylated by PPP1CA and PPP2CA. Phosphorylation by CK1 enhances binding of GSK3B to AXIN1. ADP-ribosylated by tankyrase TNKS and TNKS2. Poly-ADP-ribosylated protein is recognized by RNF146, followed by ubiquitination at 'Lys-48' and subsequent activation of the Wnt signaling pathway. Ubiquitinated by RNF146 when poly-ADP-ribosylated, leading to its degradation and subsequent activation of the Wnt signaling pathway. Sumoylation at Lys-857 and Lys-860 prevents ubiquitination and degradation. Sumoylation is required for AXIN1-mediated JNK activation. Deubiquitinated by USP34, deubiquitinated downstream of beta-catenin stabilization step: deubiquitination is important for nuclear accumulation during Wnt signaling to positively regulate beta-catenin (CTNBB1)-mediated transcription. Ubiquitination by SIAH1 and SIAH2 induces its proteasomal degradation as part of the activation of the Wnt signaling pathway. |
| Function | Component of the beta-catenin destruction complex required for regulating CTNNB1 levels through phosphorylation and ubiquitination, and modulating Wnt-signaling. Controls dorsoventral patterning via two opposing effects.down-regulates CTNNB1 to inhibit the Wnt signaling pathway and ventralize embryos, but also dorsalizes embryos by activating a Wnt-independent JNK signaling pathway. In Wnt signaling, probably facilitates the phosphorylation of CTNNB1 and APC by GSK3B. Likely to function as a tumor suppressor. Enhances TGF-beta signaling by recruiting the RNF111 E3 ubiquitin ligase and promoting the degradation of inhibitory SMAD7. Also a component of the AXIN1-HIPK2-TP53 complex which controls cell growth, apoptosis and development. Facilitates the phosphorylation of TP53 by HIPK2 upon ultraviolet irradiation. |
| Protein Name | Axin-1Axis Inhibition Protein 1Haxin |
| Database Links | Reactome: R-HSA-195253Reactome: R-HSA-196299Reactome: R-HSA-201681Reactome: R-HSA-4641257Reactome: R-HSA-4641262Reactome: R-HSA-5339716Reactome: R-HSA-5358747Reactome: R-HSA-5358749Reactome: R-HSA-5358751Reactome: R-HSA-5358752Reactome: R-HSA-5467337Reactome: R-HSA-5467340Reactome: R-HSA-5467348Reactome: R-HSA-5689880Reactome: R-HSA-8931987Reactome: R-HSA-8939256Reactome: R-HSA-9018519 |
| Cellular Localisation | CytoplasmNucleusMembraneCell MembraneMacf1 Is Required For Its Translocation To Cell MembraneOn Uv IrradiationTranslocates To The Nucleus And Colocalizes With Daax |
| Alternative Protein Names | Axin-1 proteinAxis Inhibition Protein 1 proteinHaxin proteinAXIN1 proteinAXIN protein |
Information sourced from Uniprot.org
