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  Succinate:quinone oxidoreductases – what can we learn from Wolinella succinogenes quinol:fumarate reductase

Lancaster, C. R. D. (2001). Succinate:quinone oxidoreductases – what can we learn from Wolinella succinogenes quinol:fumarate reductase. FEBS Letters, 504(3), 133-141. doi:10.1016/S0014-5793(01)02706-5.

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 Creators:
Lancaster, C. Roy D.1, Author              
Affiliations:
1Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Max Planck Society, ou_2068290              

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Free keywords: Atomic model; Bioenergetics; Fumarate reductase; Membrane protein; Succinate dehydrogenase; X-ray crystallography
 Abstract: The structure of Wolinella succinogenes quinol:fumarate reductase by X-ray crystallography has been determined at 2.2-Å resolution [Lancaster et al. (1999), Nature 402, 377–385]. Based on the structure of the three protein subunits A, B, and C and the arrangement of the six prosthetic groups (a covalently bound FAD, three iron–sulphur clusters, and two haem b groups) a pathway of electron transfer from the quinol-oxidising dihaem cytochrome b in the membrane to the site of fumarate reduction in the hydrophilic subunit A has been proposed. By combining the results from site-directed mutagenesis, functional and electrochemical characterisation, and X-ray crystallography, a residue was identified which is essential for menaquinol oxidation. [Lancaster et al. (2000), Proc. Natl. Acad. Sci. USA 97, 13051–13056]. The location of this residue in the structure suggests that the coupling of the oxidation of menaquinol to the reduction of fumarate in dihaem-containing succinate:quinone oxidoreductases could be associated with the generation of a transmembrane electrochemical potential. Based on crystallographic analysis of three different crystal forms of the enzyme and the results from site-directed mutagenesis, we have derived a mechanism of fumarate reduction and succinate oxidation [Lancaster et al. (2001) Eur. J. Biochem. 268, 1820–1827], which should be generally relevant throughout the superfamily of succinate:quinone oxidoreductases.

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Language(s): eng - English
 Dates: 2001-06-112001-06-262001-08-282001-08-31
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/S0014-5793(01)02706-5
 Degree: -

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Title: FEBS Letters
  Other : FEBS Lett.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 504 (3) Sequence Number: - Start / End Page: 133 - 141 Identifier: ISSN: 0014-5793
CoNE: https://pure.mpg.de/cone/journals/resource/954925399501