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1hpm

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{{STRUCTURE_1hpm| PDB=1hpm | SCENE= }}
{{STRUCTURE_1hpm| PDB=1hpm | SCENE= }}
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'''HOW POTASSIUM AFFECTS THE ACTIVITY OF THE MOLECULAR CHAPERONE HSC70. II. POTASSIUM BINDS SPECIFICALLY IN THE ATPASE ACTIVE SITE'''
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===HOW POTASSIUM AFFECTS THE ACTIVITY OF THE MOLECULAR CHAPERONE HSC70. II. POTASSIUM BINDS SPECIFICALLY IN THE ATPASE ACTIVE SITE===
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==Overview==
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Crystallographic anomalous scattering from potassium at 1.7 A resolution reveals two monovalent ions that interact with MgADP and P(i) in the nucleotide binding cleft of wild-type recombinant bovine Hsc70 ATPase fragment. K+ at site 1 interacts with oxygens of the beta-phosphate of ADP, whereas K+ at site 2 interacts with an oxygen of P(i). Both K+ ions also interact with specific H2O molecules in the first hydration shell of the octahedrally coordinated Mg2+ ion and with specific protein ligands. In crystals that have Na+ present, K+ is replaced by a Na+ ion at site 1 and by a Na(+)-H2O pair at site 2. The K+ ions are positioned where they could stabilize binding of a beta,gamma-bidentate MgATP complex with Hsc70, as well as a transition state during ATP hydrolysis, suggesting that monovalent ions act as specific metal cofactors in the ATPase reaction of Hsc70.
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(as it appears on PubMed at http://www.pubmed.gov), where 7836458 is the PubMed ID number.
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{{ABSTRACT_PUBMED_7836458}}
==About this Structure==
==About this Structure==
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[[Category: Mckay, D B.]]
[[Category: Mckay, D B.]]
[[Category: Wilbanks, S M.]]
[[Category: Wilbanks, S M.]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 19:05:54 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 08:30:31 2008''

Revision as of 05:30, 1 July 2008

Image:1hpm.png

Template:STRUCTURE 1hpm

HOW POTASSIUM AFFECTS THE ACTIVITY OF THE MOLECULAR CHAPERONE HSC70. II. POTASSIUM BINDS SPECIFICALLY IN THE ATPASE ACTIVE SITE

Template:ABSTRACT PUBMED 7836458

About this Structure

1HPM is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.

Reference

How potassium affects the activity of the molecular chaperone Hsc70. II. Potassium binds specifically in the ATPase active site., Wilbanks SM, McKay DB, J Biol Chem. 1995 Feb 3;270(5):2251-7. PMID:7836458

Page seeded by OCA on Tue Jul 1 08:30:31 2008

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