- Fumarate reductase
Pfam_box
Symbol = Fum_red_TM
Name = Fumarate reductase respiratory complex
width =
caption =
Pfam= PF02967
InterPro= IPR004224
SMART=
Prosite =
SCOP = 1qla
TCDB =
OPM family= 3
OPM protein= 2bs3
PDB=PDB3|1qlaF:1-243 PDB3|2bs3F:1-243 PDB3|1qlbC:1-243PDB3|2bs4F:1-243Fumarate reductase is the
enzyme that converts fumarate to succinate, it is important inmicrobial metabolism as a means foranaerobic respiration . [cite journal |author=Iverson TM, Luna-Chavez C, Cecchini G, Rees DC |title=Structure of the Escherichia coli fumarate reductase respiratory complex |journal=Science |volume=284 |issue=5422 |pages=1961–6 |year=1999 |pmid=10373108 |doi=10.1126/science.284.5422.1961]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 therespiratory chain (succinate dehydrogenase )cite journal |author=Michel H, Lancaster CR, Kroger A, Auer M |title=Structure of fumarate reductase from Wolinella succinogenes at 2.2 A resolution |journal=Nature |volume=402 |issue=6760 |pages=377–385 |year=1999 |pmid=10586875 |doi=10.1038/45133] .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.ee also
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Succinate dehydrogenase References
External links
* [http://www.expasy.org/cgi-bin/nicedoc.pl?PDOC00393 Fumarate reductase / succinate dehydrogenase FAD-binding site] in
PROSITE
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