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1fot

From Proteopedia

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{{STRUCTURE_1fot| PDB=1fot | SCENE= }}
{{STRUCTURE_1fot| PDB=1fot | SCENE= }}
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'''STRUCTURE OF THE UNLIGANDED CAMP-DEPENDENT PROTEIN KINASE CATALYTIC SUBUNIT FROM SACCHAROMYCES CEREVISIAE'''
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===STRUCTURE OF THE UNLIGANDED CAMP-DEPENDENT PROTEIN KINASE CATALYTIC SUBUNIT FROM SACCHAROMYCES CEREVISIAE===
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==Overview==
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The structure of TPK1delta, a truncated variant of the cAMP-dependent protein kinase catalytic subunit from Saccharomyces cerevisiae, was determined in an unliganded state at 2.8 A resolution and refined to a crystallographic R-factor of 19.4%. Comparison of this structure to that of its fully liganded mammalian homolog revealed a highly conserved protein fold comprised of two globular lobes. Within each lobe, root mean square deviations in Calpha positions averaged approximately equals 0.9 A. In addition, a phosphothreonine residue was found in the C-terminal domain of each enzyme. Further comparison of the two structures suggests that a trio of conformational changes accompanies ligand-binding. The first consists of a 14.7 degrees rigid-body rotation of one lobe relative to the other and results in closure of the active site cleft. The second affects only the glycine-rich nucleotide binding loop, which moves approximately equals 3 A to further close the active site and traps the nucleotide substrate. The third is localized to a C-terminal segment that makes direct contact with ligands and the ligand-binding cleft. In addition to resolving the conformation of unliganded enzyme, the model shows that the salient features of the cAMP-dependent protein kinase are conserved over long evolutionary distances.
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(as it appears on PubMed at http://www.pubmed.gov), where 11368172 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11368172}}
==About this Structure==
==About this Structure==
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[[Category: Open conformation]]
[[Category: Open conformation]]
[[Category: Protein kinase]]
[[Category: Protein kinase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:35:14 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 03:42:08 2008''

Revision as of 00:42, 1 July 2008

Image:1fot.png

Template:STRUCTURE 1fot

STRUCTURE OF THE UNLIGANDED CAMP-DEPENDENT PROTEIN KINASE CATALYTIC SUBUNIT FROM SACCHAROMYCES CEREVISIAE

Template:ABSTRACT PUBMED 11368172

About this Structure

1FOT is a Single protein structure of sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.

Reference

Structure of the unliganded cAMP-dependent protein kinase catalytic subunit from Saccharomyces cerevisiae., Mashhoon N, Carmel G, Pflugrath JW, Kuret J, Arch Biochem Biophys. 2001 Mar 1;387(1):11-9. PMID:11368172

Page seeded by OCA on Tue Jul 1 03:42:08 2008

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