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1ctp

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{{STRUCTURE_1ctp| PDB=1ctp | SCENE= }}
{{STRUCTURE_1ctp| PDB=1ctp | SCENE= }}
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'''STRUCTURE OF THE MAMMALIAN CATALYTIC SUBUNIT OF CAMP-DEPENDENT PROTEIN KINASE AND AN INHIBITOR PEPTIDE DISPLAYS AN OPEN CONFORMATION'''
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===STRUCTURE OF THE MAMMALIAN CATALYTIC SUBUNIT OF CAMP-DEPENDENT PROTEIN KINASE AND AN INHIBITOR PEPTIDE DISPLAYS AN OPEN CONFORMATION===
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==Overview==
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The crystal structure of a binary complex of the porcine heart catalytic (C) subunit of cAMP-dependent protein kinase (space group P4(1)32; a = 171.5 A) complexed with a di-iodinated peptide inhibitor, PKI(5-24), has been solved and refined to 2.9 A resolution with an overall R of 21.1%. The r.m.s. deviations from ideal bond lengths and angles are 0.022 A and 4.3 degrees. A single isotropic B of 17 A(2) was used for all atoms. The structure solution was carried out initially by molecular replacement of electron density followed by refinement against atomic coordinates from orthorhombic crystals of a binary complex of the mouse recombinant enzyme previously described [Knighton, Zheng, Ten Eyck, Ashford, Xuong, Taylor &amp; Sowadski (1991). Science, 253, 407-414]. The most striking difference between the two crystal structures is a large displacement of the small lobe of the enzyme. In the cubic crystal, the beta-sheet of the small lobe is rotated by 15 degrees and translated by 1.9 A with respect to the orthorhombic crystal. Possible explanations for why this binary complex crystallized in an open conformation in contrast to a similar binary complex of the recombinant enzyme are discussed. This study demonstrates that considerable information about parts of a crystal structure can be obtained without a complete crystal structure analysis. Specifically, the six rigid-group parameters of a poly alanine model of the beta-structure were obtained satisfactorily from a crystal structure by refinement of difference Fourier coefficients based on an approximate partial structure model.
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{{ABSTRACT_PUBMED_15299513}}
==About this Structure==
==About this Structure==
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[[Category: Xuong, N H.]]
[[Category: Xuong, N H.]]
[[Category: Zheng, J.]]
[[Category: Zheng, J.]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 21:21:03 2008''

Revision as of 18:21, 30 June 2008

Image:1ctp.png

Template:STRUCTURE 1ctp

STRUCTURE OF THE MAMMALIAN CATALYTIC SUBUNIT OF CAMP-DEPENDENT PROTEIN KINASE AND AN INHIBITOR PEPTIDE DISPLAYS AN OPEN CONFORMATION

Template:ABSTRACT PUBMED 15299513

About this Structure

1CTP is a Protein complex structure of sequences from Sus scrofa. Full crystallographic information is available from OCA.

Reference

Structure of the mammalian catalytic subunit of cAMP-dependent protein kinase and an inhibitor peptide displays an open conformation., Karlsson R, Zheng J, Xuong N, Taylor SS, Sowadski JM, Acta Crystallogr D Biol Crystallogr. 1993 Jul 1;49(Pt 4):381-8. PMID:15299513

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