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- ****************************
- * Glutaredoxin active site *
- ****************************
-
- Glutaredoxin [1,2,3] (also known as thioltransferase) is a small protein of
- approximately one hundred amino acid residues. It functions as an electron
- carrier in the glutathione-dependent synthesis of deoxyribonucleotides by the
- enzyme ribonucleotide reductase. Like thioredoxin, which functions in a
- similar way, glutaredoxin possess an active center disulfide bond. The
- molecule exists in either a reduced or an oxidized form where the two cysteine
- residues are linked in an intramolecular disulfide bond.
-
- Glutaredoxin has been sequenced in Escherichia coli, in yeast [4], and in
- mammals. On the basis of extensive sequence similarities it has been proposed
- [5] that vaccinia protein O2L is most probably a glutaredoxin. Finally it must
- be noted that phage T4 thioredoxin seems also to be evolutionary related.
-
- -Consensus pattern: C-[PV]-[FYW]-C-x(2)-[TA]-x(2,3)-[LI]
- [The two C's form the redox-active bond]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Note: in position 2 of the pattern all glutaredoxin sequences have Pro, while
- T4 thioredoxin has Val.
-
- -Last update: October 1993 / Pattern and text revised.
-
- [ 1] Gleason F.K., Holmgren A.
- FEMS Microbiol. Rev. 54:271-298(1988).
- [ 2] Holmgren A.
- Biochem. Soc. Trans. 16:95-96(1988).
- [ 3] Holmgren A.
- J. Biol. Chem. 264:13963-13966(1989).
- [ 4] Gan Z.R., Polokoff M.A., Jacobs J.W., Sardana M.K.
- Biochem. Biophys. Res. Commun. 168:944-951(1990).
- [ 5] Johnson G.P., Goebel S.J., Perkus M.E., Davis S.W., Winslow J.P.,
- Paoletti E.
- Virology 181:378-381(1991).
-