1gws
HEXADECAHEME HIGH MOLECULAR WEIGHT CYTOCHROME HMC FROM DESULFOVIBRIO VULGARIS HILDENBOROUGH
OverviewOverview
Sulfate-reducing bacteria contain a variety of multi-heme c-type cytochromes. The cytochrome of highest molecular weight (Hmc) contains 16 heme groups and is part of a transmembrane complex involved in the sulfate respiration pathway. We present the 2.42 A resolution crystal structure of the Desulfovibrio vulgaris Hildenborough cytochrome Hmc and a structural model of the complex with its physiological electron transfer partner, cytochrome c(3), obtained by NMR restrained soft-docking calculations. The Hmc is composed of three domains, which exist independently in different sulfate-reducing species, namely cytochrome c(3), cytochrome c(7), and Hcc. The complex involves the last heme at the C-terminal region of the V-shaped Hmc and heme 4 of cytochrome c(3), and represents an example for specific cytochrome-cytochrome interaction.
About this StructureAbout this Structure
1GWS is a Single protein structure of sequence from Desulfovibrio vulgaris. Full crystallographic information is available from OCA.
ReferenceReference
The crystal structure of the hexadeca-heme cytochrome Hmc and a structural model of its complex with cytochrome c(3)., Czjzek M, ElAntak L, Zamboni V, Morelli X, Dolla A, Guerlesquin F, Bruschi M, Structure. 2002 Dec;10(12):1677-86. PMID:12467575 Page seeded by OCA on Fri May 2 18:06:41 2008