1it1
From Proteopedia
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'''Solution structures of ferrocytochrome c3 from Desulfovibrio vulgaris Miyazaki F''' | '''Solution structures of ferrocytochrome c3 from Desulfovibrio vulgaris Miyazaki F''' | ||
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[[Category: Kawai, G.]] | [[Category: Kawai, G.]] | ||
[[Category: Ohmura, T.]] | [[Category: Ohmura, T.]] | ||
| - | [[Category: | + | [[Category: Electron transfer]] |
| - | [[Category: | + | [[Category: Tetraheme protein]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 20:22:50 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 17:22, 2 May 2008
Solution structures of ferrocytochrome c3 from Desulfovibrio vulgaris Miyazaki F
Overview
Heteronuclear NMR spectroscopy was performed to determine the solution structure of (15)N-labeled ferrocytochrome c(3) from Desulfovibrio vulgaris Miyazaki F (DvMF). Although the folding of the reduced cytochrome c(3) in solution was similar to that of the oxidized one in the crystal structure, the region involving hemes 1 and 2 was different. The redox-coupled conformational change is consistent with the reported solution structure of D. vulgaris Hildenborough ferrocytochrome c(3), but is different from those of other cytochromes c(3). The former is homologous with DvMF cytochrome c(3) in amino acid sequence. Small displacements of hemes 1 and 2 relative to hemes 3 and 4 were observed. This observation is consistent with the unusual behavior of the 2(1)CH(3) signal of heme 3 reported previously. As shown by the (15)N relaxation parameters of the backbone, a region between hemes 1 and 2 has more flexibility than the other regions. The results of this work strongly suggest that the cooperative reduction of hemes 1 and 2 is based on the conformational changes of the C-13 propionate of heme 1 and the aromatic ring of Tyr43, and the interaction between His34 and His 35 through covalent and coordination bonds.
About this Structure
1IT1 is a Single protein structure of sequence from Desulfovibrio vulgaris. Full crystallographic information is available from OCA.
Reference
Redox-coupled conformational alternations in cytochrome c(3) from D. vulgaris Miyazaki F on the basis of its reduced solution structure., Harada E, Fukuoka Y, Ohmura T, Fukunishi A, Kawai G, Fujiwara T, Akutsu H, J Mol Biol. 2002 Jun 7;319(3):767-78. PMID:12054869 Page seeded by OCA on Fri May 2 20:22:50 2008
