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- *****************************
- * Glycine radical signature *
- *****************************
-
- Escherichi coli pyruvate formate-lyase (EC 2.3.1.54) (gene pfl) is a key
- enzyme of anaerobic glucose metabolism, it converts pyruvate and CoA into
- acetyl-CoA and pyruvate. This enzyme is posttranslationally interconverted,
- under anaerobic conditions, from an inactive to an active form that carries a
- stable radical localized to a specific glycine at the C-terminal region of the
- polypeptidic chain [1].
-
- Such a glycine radical seems [2] also to be present in Escherichia coli (gene
- nrdD) and bacteriophage T4 (gene sunY) anaerobic ribonucleoside-triphosphate
- reductase (EC 1.17.4.2). An Escherichia coli hypothetical protein (yijL) which
- is highly similar to pfl could also contain such a radical.
-
- These proteins share a conserved region centered around the glycine which, in
- pfl, is known to bear the free radical. We use this region has a signature
- pattern.
-
- -Consensus pattern: [STIV]-x-R-[VT]-[CSA]-G-Y-x-[GAV]
- [G carries the radical]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: a phage T4 hypothetical protein and
- a fragment from a Serratia liquefaciens hypothetical protein which could be a
- member of this family.
- -Last update: October 1993 / First entry.
-
- [ 1] Wagner A.F.V., Frey M., Neugebauer F.A., Schaefer W., Knappe J.
- Proc. Natl. Acad. Sci. U.S.A. 89:996-1000(1992).
- [ 2] Sun X., Harder J., Krook M., Joernvall H., Sjoeberg B.-M., Reichard P.
- Proc. Natl. Acad. Sci. U.S.A. 90:577-581(1993).
-