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1qnn

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{{STRUCTURE_1qnn| PDB=1qnn | SCENE= }}
{{STRUCTURE_1qnn| PDB=1qnn | SCENE= }}
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'''CAMBIALISTIC SUPEROXIDE DISMUTASE FROM PORPHYROMONAS GINGIVALIS'''
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===CAMBIALISTIC SUPEROXIDE DISMUTASE FROM PORPHYROMONAS GINGIVALIS===
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==Overview==
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The crystal structure of cambialistic superoxide dismutase (SOD) from Porphyromonas gingivalis, which exhibits full activity with either Fe or Mn at the active site, has been determined at 1.8-A resolution by molecular replacement and refined to a crystallographic R factor of 17.9% (Rfree 22.3%). The crystals belong to the space group P212121 (a = 75.5 A, b = 102.7 A, c = 99.6 A) with four identical subunits in the asymmetric unit. Each pair of subunits forms a compact dimer, but not a tetramer, with 222 point symmetry. Each subunit has 191 amino-acid residues most of which are visible in electron density maps, and consists of seven alpha helices and one three-stranded antiparallel beta sheet. The metal ion, a 3 : 1 mixture of Fe and Mn, is coordinated with five ligands (His27, His74, His161, Asp157, and water) arranged at the vertices of a trigonal bipyramid. Although the overall structural features, including the metal coordination geometry, are similar to those found in other single-metal containing SODs, P. gingivalis SOD more closely resembles the dimeric Fe-SODs from Escherichia coli rather than another cambialistic SOD from Propionibacterium shermanii, which itself is rather similar to other tetrameric SODs.
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(as it appears on PubMed at http://www.pubmed.gov), where 10848964 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10848964}}
==About this Structure==
==About this Structure==
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[[Category: Yamakura, F.]]
[[Category: Yamakura, F.]]
[[Category: Oxidoreductase]]
[[Category: Oxidoreductase]]
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Revision as of 17:57, 27 July 2008

Image:1qnn.png

Template:STRUCTURE 1qnn

CAMBIALISTIC SUPEROXIDE DISMUTASE FROM PORPHYROMONAS GINGIVALIS

Template:ABSTRACT PUBMED 10848964

About this Structure

1QNN is a Single protein structure of sequence from Porphyromonas gingivalis. Full crystallographic information is available from OCA.

Reference

Crystal structure of cambialistic superoxide dismutase from porphyromonas gingivalis., Sugio S, Hiraoka BY, Yamakura F, Eur J Biochem. 2000 Jun;267(12):3487-95. PMID:10848964

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