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2sar
From Proteopedia
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[[Image:2sar.jpg|left|200px]] | [[Image:2sar.jpg|left|200px]] | ||
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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''' | '''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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==Reference== | ==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:[http://www.ncbi.nlm.nih.gov/pubmed/1654932 1654932] | 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:[http://www.ncbi.nlm.nih.gov/pubmed/1654932 1654932] | ||
| - | [[Category: Ribonuclease T(1)]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Streptomyces aureofaciens]] | [[Category: Streptomyces aureofaciens]] | ||
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[[Category: Dodson, G G.]] | [[Category: Dodson, G G.]] | ||
[[Category: Sevcik, J.]] | [[Category: Sevcik, J.]] | ||
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Revision as of 14:17, 4 May 2008
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
Overview
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.
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 Page seeded by OCA on Sun May 4 17:17:17 2008
