An intrinsically labile alpha-helix abutting the BCL9-binding site of beta-catenin is required for its inhibition by carnosic acid.
de la Roche, M., Rutherford, T.J., Gupta, D., Veprintsev, D.B., Saxty, B., Freund, S.M., Bienz, M.(2012) Nat Commun 3: 680-680
- PubMed: 22353711 
- DOI: 10.1038/ncomms1680
- Primary Citation of Related Structures:  
3SL9, 3SLA - PubMed Abstract: 
Wnt/β-catenin signalling controls development and tissue homeostasis. Moreover, activated β-catenin can be oncogenic and, notably, drives colorectal cancer. Inhibiting oncogenic β-catenin has proven a formidable challenge. Here we design a screen for small-molecule inhibitors of β-catenin's binding to its cofactor BCL9, and discover five related natural compounds, including carnosic acid from rosemary, which attenuates transcriptional β-catenin outputs in colorectal cancer cells ...