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- * 3-hydroxyisobutyrate dehydrogenase signature *
- ************************************************
-
- 3-hydroxyisobutyrate dehydrogenase (EC 1.1.1.31) catalyzes the NAD-dependent,
- reversible oxidation of 3-hydroxbutyrate to methylmalonate [1]. In eukaryotes
- it is a homodimeric mitochondrial protein involved in valine catabolism. In
- Pseudomonas aeruginosa [2] (gene mmsB); it is involved in the distal valine
- metabolic pathway.
-
- The sequence of 3-hydroxyisobutyrate dehydrogenase from eukaryotic and
- prokaryotic sources show that this enzyme has been well conserved throughout
- evolution. Two Escherichia coli hypothetical proteins (yhaE and yihU) have
- sequences that are highly similar to that of 3-hydroxyisobutyrate
- dehydrogenase [3].
-
- As a signature pattern we selected a highly conserved glycine-rich region
- located at the the N-terminus of these proteins. This region is probably
- involved in the binding of NAD.
-
- -Consensus pattern: F-[LIVM]-G-L-G-x-M-G-x-P-M-[SA]-x-N-L
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / First entry.
-
- [ 1] Rougraff P.M., Zhang B., Kuntz M.J., Harris R.A., Crabb D.W.
- J. Biol. Chem. 264:5899-5903(1989).
- [ 2] Steele M.I., Lorenz D., Hatter K., Park A., Sokatch J.R.
- J. Biol. Chem. 267:13585-13592(1992).
- [ 3] Plunkett G. III, Burland V.D., Daniels D.L., Blattner F.R.
- Nucleic Acids Res. 21:3391-3398(1993).
-