2cn5: Difference between revisions

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[[Image:2cn5.gif|left|200px]]
{{Seed}}
[[Image:2cn5.png|left|200px]]


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{{STRUCTURE_2cn5|  PDB=2cn5  |  SCENE=  }}  
{{STRUCTURE_2cn5|  PDB=2cn5  |  SCENE=  }}  


'''CRYSTAL STRUCTURE OF HUMAN CHK2 IN COMPLEX WITH ADP'''
===CRYSTAL STRUCTURE OF HUMAN CHK2 IN COMPLEX WITH ADP===




==Overview==
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The protein kinase Chk2 (checkpoint kinase 2) is a major effector of the replication checkpoint. Chk2 activation is initiated by phosphorylation of Thr68, in the serine-glutamine/threonine-glutamine cluster domain (SCD), by ATM. The phosphorylated SCD-segment binds to the FHA domain of a second Chk2 molecule, promoting dimerisation of the protein and triggering phosphorylation of the activation segment/T-loop in the kinase domain. We have now determined the structure of the kinase domain of human Chk2 in complexes with ADP and a small-molecule inhibitor debromohymenialdisine. The structure reveals a remarkable dimeric arrangement in which T-loops are exchanged between protomers, to form an active kinase conformation in trans. Biochemical data suggest that this dimer is the biologically active state promoted by ATM-phosphorylation, and also suggests a mechanism for dimerisation-driven activation of Chk2 by trans-phosphorylation.
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{{ABSTRACT_PUBMED_16794575}}


==About this Structure==
==About this Structure==
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[[Category: Transferase]]
[[Category: Transferase]]
[[Category: Tumour suppressor]]
[[Category: Tumour suppressor]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 22:33:53 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 15:14:55 2008''

Revision as of 12:15, 29 July 2008

File:2cn5.png

Template:STRUCTURE 2cn5

CRYSTAL STRUCTURE OF HUMAN CHK2 IN COMPLEX WITH ADP

Template:ABSTRACT PUBMED 16794575

About this Structure

2CN5 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Trans-activation of the DNA-damage signalling protein kinase Chk2 by T-loop exchange., Oliver AW, Paul A, Boxall KJ, Barrie SE, Aherne GW, Garrett MD, Mittnacht S, Pearl LH, EMBO J. 2006 Jul 12;25(13):3179-90. Epub 2006 Jun 22. PMID:16794575

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