Inulin fructotransferase (DFA-III-forming)
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The enzyme inulin fructotransferase (DFA-III-forming) (EC 4.2.2.18) catalyzes the following process:
- Produces α-D-fructofuranose β-D-fructofuranose 1,2′:2,3′-dianhydride (DFA III) by successively eliminating the diminishing (2→1)-β-D-fructan (inulin) chain from the terminal D-fructosyl-D-fructosyl disaccharide.
| Inulin fructotransferase (DFA-III-forming) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 4.2.2.18 | ||||||||
| CAS no. | 50936-42-0 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
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)-β-D-fructan lyase (α-D-fructofuranose-β-D-fructofuranose-1,2′:2,3′-dianhydride-forming). Other names in common use include inulin fructotransferase (DFA-III-producing), inulin fructotransferase (depolymerizing), inulase II, inulinase II, inulin fructotransferase (depolymerizing, difructofuranose-1,2′:2,3′-dianhydride-forming), inulin D-fructosyl-D-fructosyltransferase, (1,2′:2,3′-dianhydride-forming), inulin D-fructosyl-D-fructosyltransferase (forming, and α-D-fructofuranose β-D-fructofuranose 1,2′:2,3'-dianhydride).
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