Ascopyrone tautomerase

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

Ascopyrone tautomerase
Identifiers
EC no.	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

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.

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.

See also

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

References

• 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.