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- ************************************************************
- * Adrenodoxin family, iron-sulfur binding region signature *
- ************************************************************
-
- Ferredoxins [1] are a group of iron-sulfur proteins which mediate electron
- transfer in a wide variety of metabolic reactions. Ferredoxins can be divided
- into several subgroups depending upon the physiological nature of the iron
- sulfur cluster(s) and according to sequence similarities. One family of
- ferredoxins groups together the following proteins that all bind a single 2Fe-
- 2S iron-sulfur cluster:
-
- - Adrenodoxin (ADX) (adrenal ferredoxin), a vertebrate mitochondrial protein
- which transfers electrons from adrenodoxin reductase to cytochrome P450scc,
- which is involved in cholesterol side chain cleavage.
- - Putidaredoxin (PTX), a Pseudomonas putida protein which transfers electrons
- from putidaredoxin reductase to cytochrome P450-cam, which is involved in
- the oxidation of camphor.
- - Terpredoxin [2], a Pseudomonas protein which transfers electrons from
- terpredoxin reductase to cytochrome P450-terp, which is involved in the
- oxidation of alpha-terpineol.
- - Escherichia coli ferredoxin (gene fdx) [3] whose exact function is not yet
- known.
- - Rhodobacter capsulatus ferredoxin VI [4], which may transfer electrons to a
- yet uncharacterized oxygenase.
- - Caulobacter crescentus ferredoxin (gene fdxB) [5].
-
- In these proteins, four cysteine residues bind the iron-sulfur cluster. Three
- of these cysteines are clustered together in the same region of the protein.
- Our signature pattern spans that iron-sulfur binding region.
-
- -Consensus pattern: C-x(2)-[STA]-x-[STAV]-C-[STA]-T-C-[HR]
- [The three C's are 2Fe-2S ligands]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Pattern and text revised.
-
- [ 1] Meyer J.
- Trends Ecol. Evol. 3:222-226(1988).
- [ 2] Peterson J.A., Lu J.-Y., Geisselsoder J., Graham-Lorence S., Carmona C.,
- Witney F., Lorence M.C.
- J. Biol. Chem. 267:14193-14203(1992).
- [ 3] Ta D.T., Vickery L.E.
- J. Biol. Chem. 267:11120-11125(1992).
- [ 4] Naud I., Vincon M., Garin J., Gaillard J., Forest E., Jouanneau Y.
- Eur. J. Biochem. 222:933-939(1994).
- [ 5] Amemiya K
- EMBL/Genbank: X51607.
-