Structure of GSK3beta reveals a primed phosphorylation mechanism.
ter Haar, E., Coll, J.T., Austen, D.A., Hsiao, H.M., Swenson, L., Jain, J.(2001) Nat.Struct.Mol.Biol. 8: 593-596
- PubMed: 11427888 
- DOI: 10.1038/89624
- PubMed Abstract: 
GSK3beta was identified as the kinase that phosphorylates glycogen synthase but is now known to be involved in multiple signaling pathways. GSK3beta prefers prior phosphorylation of its substrates. We present the structure of unphosphorylated GSK3bet ...