2sar

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{{STRUCTURE_2sar| PDB=2sar | SCENE= }}
{{STRUCTURE_2sar| PDB=2sar | SCENE= }}
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'''DETERMINATION AND RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURES OF RIBONUCLEASE SA AND ITS COMPLEX WITH 3'-GUANYLIC ACID AT 1.8 ANGSTROMS RESOLUTION'''
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===DETERMINATION AND RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURES OF RIBONUCLEASE SA AND ITS COMPLEX WITH 3'-GUANYLIC ACID AT 1.8 ANGSTROMS RESOLUTION===
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==Overview==
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The crystal structures of ribonuclease from Streptomyces aureofaciens (RNase Sa) and its complex with 3'-guanylic acid (guanosine 3'-monophosphate, 3'-GMP) have been determined by the method of isomorphous replacement. The atomic parameters have been refined by restrained least-squares minimization using data in the resolution range 10.0-1.8 A. All protein atoms and more than 230 water atoms in the two crystal structures have been refined to crystallographic R factors of 0.172 and 0.175 respectively. The estimated r.m.s. error in the atomic positions ranges from 0.2 A for well-defined atoms to about 0.5 A for more poorly defined atoms. There are two enzyme molecules in the asymmetric unit, built independently, and referred to as molecules A and B. The value of the average B factor for protein atoms in both structures is about 19 A2 and for water molecules about 35 A2. Electron density for the substrate analogue 3'-GMP was found only at the active site of molecule A. The density was very clear and the positions of all 3'-GMP atoms were refined with precision comparable to that of the protein.
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(as it appears on PubMed at http://www.pubmed.gov), where 1654932 is the PubMed ID number.
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{{ABSTRACT_PUBMED_1654932}}
==About this Structure==
==About this Structure==
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[[Category: Dodson, G G.]]
[[Category: Dodson, G G.]]
[[Category: Sevcik, J.]]
[[Category: Sevcik, J.]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 15:52:34 2008''

Revision as of 12:52, 27 July 2008

Image:2sar.png

Template:STRUCTURE 2sar

DETERMINATION AND RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURES OF RIBONUCLEASE SA AND ITS COMPLEX WITH 3'-GUANYLIC ACID AT 1.8 ANGSTROMS RESOLUTION

Template:ABSTRACT PUBMED 1654932

About this Structure

2SAR is a Single protein structure of sequence from Streptomyces aureofaciens. Full crystallographic information is available from OCA.

Reference

Determination and restrained least-squares refinement of the structures of ribonuclease Sa and its complex with 3'-guanylic acid at 1.8 A resolution., Sevcik J, Dodson EJ, Dodson GG, Acta Crystallogr B. 1991 Apr 1;47 ( Pt 2):240-53. PMID:1654932

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