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Succinate + acceptor <=> fumarate + reduced acceptor
In other words, fumarate reductase couples the reduction of fumarate to succinate to the oxidation of quinol to quinone, in a reaction opposite to that catalysed by the related complex II of the respiratory chain (succinate dehydrogenase).
Fumarate reductase complex includes three subunits. Subunit A contains the site of fumarate reduction and a covalently bound flavin adenine dinucleotide prosthetic group. Subunit B contains three iron-sulphur centres. The menaquinol-oxidizing subunit C consists of five membrane-spanning, primarily helical segments and binds two haem b molecules.
This article includes text from the public domain Pfam and InterPro IPR004224
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Fumarate_reductase". A list of authors is available in Wikipedia.|