Wnt signaling inhibits casein kinase 1α activity by modulating its interaction with protein phosphatase 2A
Shen et al. show that the activity of a ubiquitous enzyme, CK1α, is autoinhibited upon the stimulation of Wnt signaling. The underlying mechanism involves the rearrangement of a multiprotein complex consisting of CK1α, PP2A, and AXIN. The authors further illustrate the importance of CK1α autoinhibition in colorectal cancer growth.