Ascopyrone tautomerase

Ascopyrone tautomerase
Identifiers
EC number	5.3.2.7
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

In enzymology, an ascopyrone tautomerase (EC 5.3.2.7) is an enzyme that catalyzes the chemical reaction

1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose $\rightleftharpoons$ 1,5-anhydro-4-deoxy-D-glycero-hex-1-en-3-ulose

Hence, this enzyme has one substrate, 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose, and one product, 1,5-anhydro-4-deoxy-D-glycero-hex-1-en-3-ulose.

The enzyme is involved with the anhydrofructose pathway.^[1]

This enzyme belongs to the family of isomerases, specifically those intramolecular oxidoreductases interconverting keto- and enol-groups. The systematic name of this enzyme class is 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose Delta3-Delta1-isomerase. Other names in common use include ascopyrone isomerase, ascopyrone intramolecular oxidoreductase, 1,5-anhydro-D-glycero-hex-3-en-2-ulose tautomerase, APM tautomerase, ascopyrone P tautomerase, and APTM.

References

1. IUBMB - Anhydrofructose Pathway

• Yu S, Refdahl C, Lundt I (2004). "Enzymatic description of the anhydrofructose pathway of glycogen degradation; I. Identification and purification of anhydrofructose dehydratase, ascopyrone tautomerase and alpha-1,4-glucan lyase in the fungus Anthracobia melaloma". Biochim. Biophys. Acta 1672 (2): 120–9. doi:10.1016/j.bbagen.2004.03.004. PMID 15110094.
• Yu S, Fiskesund R (2006). "The anhydrofructose pathway and its possible role in stress response and signaling". Biochim. Biophys. Acta 1760 (9): 1314–22. doi:10.1016/j.bbagen.2006.05.007. PMID 16822618.

See also

• Anhydrofructose pathway
• 1,5-anhydro-D-fructose dehydratase
• exo-(1→4)-α-D-glucan lyase