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- * Fumarate reductase / succinate dehydrogenase FAD-binding site *
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-
- In bacteria two distinct, membrane-bound, enzyme complexes are responsible for
- the interconversion of fumarate and succinate (EC 1.3.99.1): fumarate
- reductase (Frd) is used in anaerobic growth, and succinate dehydrogenase (Sdh)
- is used in aerobic growth. Both complexes consist of two main components: a
- membrane-extrinsic component composed of a FAD-binding flavoprotein and an
- iron-sulfur protein; and an hydrophobic component composed of a membrane
- anchor protein and/or a cytochrome B.
-
- In eukaryotes mitochondrial succinate dehydrogenase (ubiquinone) (EC 1.3.5.1)
- is an enzyme composed of two subunits: a FAD flavoprotein and and iron-sulfur
- protein.
-
- The flavoprotein subunit is a protein of about 60 to 70 Kd to which FAD is
- covalently bound to a histidine residue which is located in the N-terminal
- section of the protein [1]. The sequence around that histidine is well
- conserved in Frd and Sdh from various bacterial and eukaryotic species [2] and
- can be used as a signature pattern.
-
- -Consensus pattern: R-S-H-[ST]-x(2)-A-x-G-G
- [H is the FAD binding site]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / Text revised.
-
- [ 1] Blaut M., Whittaker K., Valdovinos A., Ackrell B.A., Gunsalus R.P.,
- Cecchini G.
- J. Biol. Chem. 264:13599-13604(1989).
- [ 2] Birch-MacHin M.A., Farnsworth L., Ackrell B.A., Cochran B., Jackson S.,
- Bindoff L.A., Aitken A., Diamond A.G., Turnbull D.M.
- J. Biol. Chem. 267:11553-11558(1992).
-