Difructose-anhydride synthase

difructose-anhydride synthase
Identifiers
EC number	3.2.1.134
CAS number	121479-55-8
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / EGO
Search PMC articles PubMed articles NCBI proteins

In enzymology, a difructose-anhydride synthase (EC 3.2.1.134) is an enzyme that catalyzes the chemical reaction

bis-D-fructose 2',1:2,1'-dianhydride + H₂O $\rightleftharpoons$ inulobiose

Thus, the two substrates of this enzyme are bis-D-fructose 2',1:2,1'-dianhydride and H₂O, whereas its product is inulobiose.

This enzyme belongs to the family of hydrolases, specifically those glycosidases that hydrolyse O- and S-glycosyl compounds. The systematic name of this enzyme class is bis-D-fructose 2',1:2,1'-dianhydride fructohydrolase. This enzyme is also called inulobiose hydrolase.

References

• Matsuyama T and Tanaka K (1989). "On the enzyme of Aspergillus fumigatus producing difructose anhydride I from inulobiose". Agric. Biol. Chem. 53: 831–832. doi:10.1271/bbb1961.53.831.
• Matsuyama T, Tanaka K, Mashiko M, Kanamoto M. "Enzymic formation of di-D-fructose 1,2'; 2,1' dianhydride from inulobiose by Aspergillus fumigatus". J. (Tokyo). Biochem. (4): 1325–8. PMID 6757245.