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XB-ART-15101
Mol Cell Biol 1998 May 01;185:2867-75. doi: 10.1128/MCB.18.5.2867.
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Axil, a member of the Axin family, interacts with both glycogen synthase kinase 3beta and beta-catenin and inhibits axis formation of Xenopus embryos.

Yamamoto H , Kishida S , Uochi T , Ikeda S , Koyama S , Asashima M , Kikuchi A .


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Using a yeast two-hybrid method, we identified a novel protein which interacts with glycogen synthase kinase 3beta (GSK-3beta). This protein had 44% amino acid identity with Axin, a negative regulator of the Wnt signaling pathway. We designated this protein Axil for Axin like. Like Axin, Axil ventralized Xenopus embryos and inhibited Xwnt8-induced Xenopus axis duplication. Axil was phosphorylated by GSK-3beta. Axil bound not only to GSK-3beta but also to beta-catenin, and the GSK-3beta-binding site of Axil was distinct from the beta-catenin-binding site. Furthermore, Axil enhanced GSK-3beta-dependent phosphorylation of beta-catenin. These results indicate that Axil negatively regulates the Wnt signaling pathway by mediating GSK-3beta-dependent phosphorylation of beta-catenin, thereby inhibiting axis formation.

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Species referenced: Xenopus
Genes referenced: axin2l gys1 wnt8a

References [+] :
Aberle, beta-catenin is a target for the ubiquitin-proteasome pathway. 1997, Pubmed