Inhibitor
of glycogen synthase kinase-3 (GSK-3); derived from FRAT1, the mammalian
version of GSK-3-binding protein. Binds to GSK-3, inhibiting its interaction
with axin, and also blocks GSK-3-catalysed phosphorylation of axin and β-catenin. Does not affect
GSK-3-mediated phosphorylation of glycogen synthase or eIF2B.
Thomaset al (1999) A GSK3-binding
peptide from FRAT1 selectively inhibits the GSK3-catalysed phosphorylation of
axin and β-catenin. FEBS
Lett. 458 247. Baxet al (2001) The structure of
phosphorylated GSK-3β complexed with peptide, FRATtide, that inhibits β-catenin phosphorylation. Structure 9
1143.