Phosphoprotein-protein interactions revealed by the crystal structure of kinase-associated phosphatase in complex with phosphoCDK2.Song, H., Hanlon, N., Brown, N.R., Noble, M.E., Johnson, L.N., Barford, D.
(2001) Mol.Cell 7: 615-626
- PubMed: 11463386
- Primary Citation of Related Structures:  1FPZ
- PubMed Abstract:
- Cdi1, a human G1 and S phase protein phosphatase that associates with Cdk2
Gyruris, J.,Golemis, E.,Chertkov, H.,Brent, R.
(1993) Cell 75: 791
- Dephosphorylation of Cdk2 Thr160 by the cyclin dependent kinase-interacting phosphatase KAP in the absence of cyclin
Poon, R.Y.C.,Hunter, T.
(1995) Science 270: 90
- The p21Cdk-interacting protein Cip1 is a potent inhibitor of G1 cyclin-dependent kinases
Harper, J.W.,Adami, G.R.,Wei, N.,Keyomarsi, K.,Elledge, S.J.
(1993) Cell 75: 805
The CDK-interacting protein phosphatase KAP dephosphorylates phosphoThr-160 (pThr-160) of the CDK2 activation segment, the site of regulatory phosphorylation that is essential for kinase activity. Here we describe the crystal structure of KAP in asso ...
The CDK-interacting protein phosphatase KAP dephosphorylates phosphoThr-160 (pThr-160) of the CDK2 activation segment, the site of regulatory phosphorylation that is essential for kinase activity. Here we describe the crystal structure of KAP in association with pThr-160-CDK2, representing an example of a protein phosphatase in complex with its intact protein substrate. The major protein interface between the two molecules is formed by the C-terminal lobe of CDK2 and the C-terminal helix of KAP, regions remote from the kinase-activation segment and the KAP catalytic site. The kinase-activation segment interacts with the catalytic site of KAP almost entirely via the phosphate group of pThr-160. This interaction requires that the activation segment is unfolded and drawn away from the kinase molecule, inducing a conformation of CDK2 similar to the activated state observed in the CDK2/cyclin A complex.
Department of Biochemistry, University of Oxford, United Kingdom.