Component of the beta-catenin destruction complex required for regulating CTNNB1 levels through phosphorylation and ubiquitination, and modulating Wnt-signaling (PubMed:12192039, PubMed:27098453, PubMed:28829046). 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 (PubMed:12192039). In Wnt signaling, probably facilitates the phosphorylation of CTNNB1 and APC by GSK3B (PubMed:12192039). Enhances TGF-beta signaling by recruiting the RNF111 E3 ubiquitin ligase and promoting the degradation of inhibitory SMAD7 (PubMed:16601693). Also a component of the AXIN1-HIPK2-TP53 complex which controls cell growth, apoptosis and development (PubMed:17210684). Facilitates the phosphorylation of TP53 by HIPK2 upon ultraviolet irradiation (PubMed:17210684). Activates the AMP-activated protein kinase (AMPK) in response to calorie restriction by acting as a molecular adapter: recruited to late endosome membrane by the V-ATPase complex downstream of TULP3, and mediates association between STK11 and its AMPK substrates PRKAA1 and/or PRKAA2, leading to AMPK activation (By similarity). {ECO:0000250|UniProtKB:O35625, ECO:0000269|PubMed:12192039, ECO:0000269|PubMed:16601693, ECO:0000269|PubMed:17210684, ECO:0000269|PubMed:27098453, ECO:0000269|PubMed:28546513}. This is the function of AXIN1 (axin 1, ENSG00000103126).