home *** CD-ROM | disk | FTP | other *** search
- **************************************************
- * Phosphoribosylglycinamide synthetase signature *
- **************************************************
-
- Phosphoribosylglycinamide synthetase (EC 6.3.4.13) (GARS) (phosphoribosylamine
- glycine ligase) [1] catalyzes the second step in the de novo biosynthesis of
- purine, the ATP-dependent addition of 5-phosphoribosylamine to glycine to
- form 5'phosphoribosylglycinamide.
-
- In bacteria GARS is a monofunctional enzyme (encoded by the purD gene), in
- yeast it is part, with phosphoribosylformylglycinamidine cyclo-ligase (AIRS)
- of a bifunctional enzyme (encoded by the ADE5,7 gene), in higher eukaryotes it
- is part, with AIRS and with phosphoribosylglycinamide formyltransferase (GART)
- of a trifunctional enzyme (GARS-AIRS-GART).
-
- The sequence of GARS is well conserved. As a signature pattern we selected a
- highly conserved octapeptide.
-
- -Consensus pattern: R-F-G-D-P-E-x-Q
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: May 1991 / Pattern and text revised.
-
- [ 1] Aiba A., Mizobuchi K.
- J. Biol. Chem. 264:21239-21246(1989).
-