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| | {{STRUCTURE_1clk| PDB=1clk | SCENE= }} | | {{STRUCTURE_1clk| PDB=1clk | SCENE= }} |
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| - | '''CRYSTAL STRUCTURE OF STREPTOMYCES DIASTATICUS NO.7 STRAIN M1033 XYLOSE ISOMERASE AT 1.9 A RESOLUTION WITH PSEUDO-I222 SPACE GROUP'''
| + | ===CRYSTAL STRUCTURE OF STREPTOMYCES DIASTATICUS NO.7 STRAIN M1033 XYLOSE ISOMERASE AT 1.9 A RESOLUTION WITH PSEUDO-I222 SPACE GROUP=== |
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| - | ==Overview==
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| - | The structure of xylose isomerase (XyI) from Streptomyces diastaticus No. 7 strain M1033 (SDXyI) has been refined at 1.85 A resolution to conventional and free R factors of 0.166 and 0.219, respectively. SDXyI was crystallized in space group P2(1)2(1)2, with unit-cell parameters a = 87.976, b = 98.836, c = 93.927 A. One dimer of the tetrametric molecule is found in each asymmetric unit. Each monomer consists of two domains: a large N-terminal domain (residues 1-320), containing a parallel eight-stranded alpha/beta barrel, and a small C-terminal loop (residues 321-387), containing five helices linked by random coil. The four monomers are essentially identical in the tetramer, possessing non-crystallographic 222 symmetry with one twofold axis essentially coincident with the crystallographic twofold axis in the space group P2(1)2(1)2, which may explain why the diffraction pattern has strong pseudo-I222 symmetry even at medium resolution. The crystal structures of XyIs from different bacterial strains, especially from Streptomyces, are similar. The alpha2 helix of the alpha/beta barrel has a different position in the structures of different XyIs. The conformation of C-terminal fragment 357-364 in the SDXyI structure has a small number of differences to that of other XyIs. Two Co(2+) ions rather than Mg(2+) ions exist in the active site of the SDXyI structure; SDXyI seems to prefer to bind Co(2+) ions rather than Mg(2+) ions. | + | The line below this paragraph, {{ABSTRACT_PUBMED_10666592}}, adds the Publication Abstract to the page |
| | + | (as it appears on PubMed at http://www.pubmed.gov), where 10666592 is the PubMed ID number. |
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| | + | {{ABSTRACT_PUBMED_10666592}} |
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| | ==About this Structure== | | ==About this Structure== |
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| | [[Category: Streptomyce]] | | [[Category: Streptomyce]] |
| | [[Category: Xylose isomerase]] | | [[Category: Xylose isomerase]] |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 12:51:52 2008'' | + | |
| | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 20:54:58 2008'' |
Revision as of 17:54, 30 June 2008
Template:STRUCTURE 1clk
CRYSTAL STRUCTURE OF STREPTOMYCES DIASTATICUS NO.7 STRAIN M1033 XYLOSE ISOMERASE AT 1.9 A RESOLUTION WITH PSEUDO-I222 SPACE GROUP
Template:ABSTRACT PUBMED 10666592
About this Structure
1CLK is a Single protein structure of sequence from Streptomyces diastaticus. Full crystallographic information is available from OCA.
Reference
Structure of xylose isomerase from Streptomyces diastaticus no. 7 strain M1033 at 1.85 A resolution., Zhu X, Teng M, Niu L, Xu C, Wang Y, Acta Crystallogr D Biol Crystallogr. 2000 Feb;56(Pt 2):129-36. PMID:10666592
Page seeded by OCA on Mon Jun 30 20:54:58 2008
