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- *************************************************
- * KDPG and KHG aldolases active site signatures *
- *************************************************
-
- 4-hydroxy-2-oxoglutarate aldolase (EC 4.1.3.16) (KHG-aldolase) catalyzes the
- interconversion of 4-hydroxy-2-oxoglutarate into pyruvate and glyoxylate.
- Phospho-2-dehydro-3-deoxygluconate aldolase (EC 4.1.2.14) (KDPG-aldolase)
- catalyzes the interconversion of 6-phospho-2-dehydro-3-deoxy-D-gluconate into
- pyruvate and glyceraldehyde 3-phosphate.
-
- These two enzymes are structurally and functionally related [1]. They are both
- homotrimeric proteins of approximately 220 amino-acid residues. They are class
- I aldolases whose catalytic mechanism involves the formation of a Schiff-base
- intermediate between the substrate and the epsilon-amino group of a lysine
- residue. In both enzymes, an arginine is required for catalytic activity.
-
- We developed two signature patterns for these enzymes. The first one contains
- the active site arginine and the second, the lysine involved in the Schiff-
- base formation.
-
- -Consensus pattern: L-E-V-T-L-R
- [R 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.
-
- -Consensus pattern: F-K-x-F-P-A-E
- [K is involved in Schiff-base formation]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: April 1990 / First entry.
-
- [ 1] Vlahos C J., Dekker E.E.
- J. Biol. Chem. 263:11683-11691(1988).
-