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[[Image:1hro.gif|left|200px]]
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[[Image:1hro.png|left|200px]]


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{{STRUCTURE_1hro|  PDB=1hro  |  SCENE=  }}  
{{STRUCTURE_1hro|  PDB=1hro  |  SCENE=  }}  


'''MOLECULAR STRUCTURE OF A HIGH POTENTIAL CYTOCHROME C2 ISOLATED FROM RHODOPILA GLOBIFORMIS'''
===MOLECULAR STRUCTURE OF A HIGH POTENTIAL CYTOCHROME C2 ISOLATED FROM RHODOPILA GLOBIFORMIS===




==Overview==
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Unlike their mitochondrial counterparts, the c-type cytochromes typically isolated from photosynthetic nonsulfur purple bacteria display a wide range of oxidation-reduction potentials. Here we describe the X-ray crystallographic analysis of the cytochrome c2 isolated from Rhodopila globiformis. This particular c-type cytochrome was selected for study because of its anomalously high redox potential of +450 mV. Crystals employed in the investigation belonged to the space group I4(1) with unit cell dimensions of a = b = 79.2 A, c = 75.2 A, and two molecules in the asymmetric unit. The structure was solved by the techniques of multiple isomorphous replacement with two heavy-atom derivatives and electron density modification procedures. Least-squares refinement of the model reduced the R-factor to 18.7% for all measured X-ray data from 30.0 to 2.2 A. The overall structural motif of the protein is composed of five alpha-helices, one type I turn, and six type II turns. As in other cytochromes c, there are two conserved water molecules located in the heme-binding pocket. Overall, the three-dimensional structure of the R. globiformis molecule is more similar to the eukaryotic c-type cytochromes than to other bacterial proteins.
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{{ABSTRACT_PUBMED_8809072}}


==About this Structure==
==About this Structure==
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[[Category: Heme]]
[[Category: Heme]]
[[Category: Photosynthesis]]
[[Category: Photosynthesis]]
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Revision as of 05:35, 1 July 2008

File:1hro.png

Template:STRUCTURE 1hro

MOLECULAR STRUCTURE OF A HIGH POTENTIAL CYTOCHROME C2 ISOLATED FROM RHODOPILA GLOBIFORMIS

Template:ABSTRACT PUBMED 8809072

About this Structure

1HRO is a Single protein structure of sequence from Rhodopila globiformis. Full crystallographic information is available from OCA.

Reference

Molecular structure of a high potential cytochrome c2 isolated from Rhodopila globiformis., Benning MM, Meyer TE, Holden HM, Arch Biochem Biophys. 1996 Sep 15;333(2):338-48. PMID:8809072

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