1fq1
From Proteopedia
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[[Image:1fq1.jpg|left|200px]] | [[Image:1fq1.jpg|left|200px]] | ||
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'''CRYSTAL STRUCTURE OF KINASE ASSOCIATED PHOSPHATASE (KAP) IN COMPLEX WITH PHOSPHO-CDK2''' | '''CRYSTAL STRUCTURE OF KINASE ASSOCIATED PHOSPHATASE (KAP) IN COMPLEX WITH PHOSPHO-CDK2''' | ||
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[[Category: Noble, M E.M.]] | [[Category: Noble, M E.M.]] | ||
[[Category: Song, H.]] | [[Category: Song, H.]] | ||
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Revision as of 13:37, 2 May 2008
CRYSTAL STRUCTURE OF KINASE ASSOCIATED PHOSPHATASE (KAP) IN COMPLEX WITH PHOSPHO-CDK2
Overview
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.
About this Structure
1FQ1 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Phosphoprotein-protein interactions revealed by the crystal structure of kinase-associated phosphatase in complex with phosphoCDK2., Song H, Hanlon N, Brown NR, Noble ME, Johnson LN, Barford D, Mol Cell. 2001 Mar;7(3):615-26. PMID:11463386 Page seeded by OCA on Fri May 2 16:37:50 2008