1rwj: Difference between revisions

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[[Image:1rwj.gif|left|200px]]
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{{STRUCTURE_1rwj|  PDB=1rwj  |  SCENE=  }}  
{{STRUCTURE_1rwj|  PDB=1rwj  |  SCENE=  }}  


'''c7-type three-heme cytochrome domain'''
===c7-type three-heme cytochrome domain===




==Overview==
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The structure of a novel c(7)-type cytochrome domain that has two bishistidine coordinated hemes and one heme with histidine, methionine coordination (where the sixth ligand is a methionine residue) was determined at 1.7 A resolution. This domain is a representative of domains that form three polymers encoded by the Geobacter sulfurreducens genome. Two of these polymers consist of four and one protein of nine c(7)-type domains with a total of 12 and 27 hemes, respectively. Four individual domains (termed A, B, C, and D) from one such multiheme cytochrome c (ORF03300) were cloned and expressed in Escherichia coli. The domain C produced diffraction quality crystals from 2.4 M sodium malonate (pH 7). The structure was solved by MAD method and refined to an R-factor of 19.5% and R-free of 21.8%. Unlike the two c(7) molecules with known structures, one from G. sulfurreducens (PpcA) and one from Desulfuromonas acetoxidans where all three hemes are bishistidine coordinated, this domain contains a heme which is coordinated by a methionine and a histidine residue. As a result, the corresponding heme could have a higher potential than the other two hemes. The apparent midpoint reduction potential, E(app), of domain C is -105 mV, 50 mV higher than that of PpcA.
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==About this Structure==
==About this Structure==
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==Reference==
==Reference==
Structure of a novel c7-type three-heme cytochrome domain from a multidomain cytochrome c polymer., Pokkuluri PR, Londer YY, Duke NE, Erickson J, Pessanha M, Salgueiro CA, Schiffer M, Protein Sci. 2004 Jun;13(6):1684-92. Epub 2004 May 7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15133162 15133162]
Structure of a novel c7-type three-heme cytochrome domain from a multidomain cytochrome c polymer., Pokkuluri PR, Londer YY, Duke NE, Erickson J, Pessanha M, Salgueiro CA, Schiffer M, Protein Sci. 2004 Jun;13(6):1684-92. Epub 2004 May 7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15133162 15133162]
Family of cytochrome c7-type proteins from Geobacter sulfurreducens: structure of one cytochrome c7 at 1.45 A resolution., Pokkuluri PR, Londer YY, Duke NE, Long WC, Schiffer M, Biochemistry. 2004 Feb 3;43(4):849-59. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14744127 14744127]
[[Category: Geobacter sulfurreducens]]
[[Category: Geobacter sulfurreducens]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: Heme coordination in c-type cytochrome]]
[[Category: Heme coordination in c-type cytochrome]]
[[Category: Multiheme cytochrome c]]
[[Category: Multiheme cytochrome c]]
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Revision as of 02:31, 28 July 2008

File:1rwj.png

Template:STRUCTURE 1rwj

c7-type three-heme cytochrome domainc7-type three-heme cytochrome domain

Template:ABSTRACT PUBMED 15133162

About this StructureAbout this Structure

1RWJ is a Single protein structure of sequence from Geobacter sulfurreducens. Full crystallographic information is available from OCA.

ReferenceReference

Structure of a novel c7-type three-heme cytochrome domain from a multidomain cytochrome c polymer., Pokkuluri PR, Londer YY, Duke NE, Erickson J, Pessanha M, Salgueiro CA, Schiffer M, Protein Sci. 2004 Jun;13(6):1684-92. Epub 2004 May 7. PMID:15133162

Family of cytochrome c7-type proteins from Geobacter sulfurreducens: structure of one cytochrome c7 at 1.45 A resolution., Pokkuluri PR, Londer YY, Duke NE, Long WC, Schiffer M, Biochemistry. 2004 Feb 3;43(4):849-59. PMID:14744127

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