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- * Orotidine 5'-phosphate decarboxylase active site *
- ****************************************************
-
- Orotidine 5'-phosphate decarboxylase (EC 4.1.1.23) (OMPdecase) [1,2] catalyzes
- the last step in the de novo biosynthesis of pyrimidines, the decarboxylation
- of OMP into UMP. In higher eukaryotes OMPdecase is part, with orotate
- phosphoribosyltransferase, of a bifunctional enzyme, while the prokaryotic and
- fungal OMPdecases are monofunctional protein.
-
- Some parts of the sequence of OMPdecase are well conserved across species. The
- best conserved region is located in the N-terminal half of OMPdecases and is
- centered around a lysine residue which is essential for the catalytic function
- of the enzyme. We have used this region as a signature pattern.
-
- -Consensus pattern: [LIVMTA]-[LIVMF]-x-D-x-K-x(2)-D-I-[GP]-x-T-[LIVMTA]
- [K is the active site residue]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1992 / Pattern and text revised.
-
- [ 1] Jacquet M., Guilbaud R., Garreau H.
- Mol. Gen. Genet. 211:441-445(1988).
- [ 2] Kimsey H.H., Kaiser D.
- J. Biol. Chem. 267:819-824(1992).
-