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- ******************************************************
- * Fructose-bisphosphate aldolase class-II signatures *
- ******************************************************
-
- Fructose-bisphosphate aldolase (EC 4.1.2.13) [1,2] is a glycolytic enzyme that
- catalyzes the reversible aldol cleavage or condensation of fructose-1,6-
- bisphosphate into dihydroxyacetone-phosphate and glyceraldehyde 3-phosphate.
- There are two classes of fructose-bisphosphate aldolases with different
- catalytic mechanisms. Class-II aldolases [2], mainly found in prokaryotes and
- fungi, are homodimeric enzymes which require a divalent metal ion - generally
- zinc - for their activity.
-
- As signature patterns for this class of enzyme, we selected two conserved
- regions. The first pattern is located in the first half of the sequence and
- contains two histidine residues that have been shown [4] to be involved in
- binding a zinc ion. The second is located in the C-terminal section and
- contains two clustered acidic residues.
-
- -Consensus pattern: [FY]-x(1,3)-[LIVM]-x-[LIVM]-x-[LIVM]-H-x-D-H-[GC]
- [The two H's are zinc ligands]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: [LIVMF]-x(2)-[GSA]-[LIVM]-x(2)-G-x(2)-K-[LIVM]-N-[LIVM]-
- [DN]-T-[DE]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: June 1994 / Patterns and text revised.
-
- [ 1] Perham R.N.
- Biochem. Soc. Trans. 18:185-187(1990).
- [ 2] Marsh J.J., Lebherz H.G.
- Trends Biochem. Sci. 17:110-113(1992).
- [ 3] von der Osten C.H., Barbas C.F. III, Wong C.-H., Sinskey A.J.
- Mol. Microbiol. 3:1625-1637(1989).
- [ 4] Berry A., Marshall K.E.
- FEBS Lett. 318:11-16(1993).
-