Inulin fructotransferase (DFA-I-forming)

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In enzymology, an inulin fructotransferase (DFA-I-forming) (EC 4.2.2.17) is an enzyme that catalyzes the chemical reaction

Produces alpha-D-fructofuranose beta-D-fructofuranose 1,2':2,1'-dianhydride (DFA I) by successively eliminating the diminishing (2->1)-beta-D-fructan (inulin) chain from the terminal D-fructosyl-D-fructosyl disaccharide.

This enzyme belongs to the family of lyases, specifically those carbon-oxygen lyases acting on polysaccharides. The systematic name of this enzyme class is 2,1-beta-D-fructan lyase (alpha-D-fructofuranose-beta-D-fructofuranose-1,2':2,1'-dianhydride- forming). Other names in common use include inulin fructotransferase (DFA-I-producing), inulin fructotransferase (depolymerizing,, difructofuranose-1,2':2',1-dianhydride-forming), inulin D-fructosyl-D-fructosyltransferase, (1,2':1',2-dianhydride-forming), inulin D-fructosyl-D-fructosyltransferase (forming, and alpha-D-fructofuranose beta-D-fructofuranose 1,2':1',2-dianhydride).

[edit] References

• IUBMB entry for 4.2.2.17
• BRENDA references for 4.2.2.17 (Recommended.)
• PubMed references for 4.2.2.17
• PubMed Central references for 4.2.2.17
• Google Scholar references for 4.2.2.17
• K (1989). "Purification and properties of a novel inulin fructotransferase (DFA I-producing) from Arthrobacter globiformis S14-3". Agric. Biol. Chem. 53: 2089–2094. 

[edit] External links

The CAS registry number for this enzyme class is 125008-19-7.

• IUBMB entry for 4.2.2.17

• KEGG entry for 4.2.2.17

• BRENDA entry for 4.2.2.17

• NiceZyme view of 4.2.2.17

• EC2PDB: PDB structures for 4.2.2.17

• PRIAM entry for 4.2.2.17

• PUMA2 entry for 4.2.2.17

• IntEnz: Integrated Enzyme entry for 4.2.2.17

• MetaCyc entry for 4.2.2.17

• Atomic-resolution structures of enzymes belonging to this class