Chibby, a nuclear inhibitor of Wnt/beta-catenin mediated transcription, and similar proteins
Chibby(Cby) is a well-conserved nuclear protein that functions as part of the Wnt/beta-catenin signaling pathway. Specifically, Cby binds directly to beta-catenin by interacting with its central region, which harbors armadillo repeats. Cby-beta-catenin interactions may also involve 14-3-3 proteins. By competing with other binding partners of beta-catenin, the Tcf/Lef transcription factors, Cby inhibits transcriptional activation. Cby has been shown to play a role in adipocyte differentiation. The C-terminal region of Cby appears to contain an alpha-helical coiled-coil motif.