ENZYME entry: EC 4.2.2.18
| Accepted Name |
|---|
| Inulin fructotransferase (DFA-III-forming).
|
| Alternative Name(s) |
|---|
| Inulase II. |
| Inulin D-fructosyl-D-fructosyltransferase (1,2':2,3'-dianhydride-
forming). |
| Inulin D-fructosyl-D-fructosyltransferase (forming alpha-D-fructofuranose
beta-D-fructofuranose 1,2':2,3'-dianhydride). |
| Inulin fructotransferase (depolymerizing). |
| Inulin fructotransferase (depolymerizing, difructofuranose-
1,2':2,3'-dianhydride-forming). |
| Inulin fructotransferase (DFA-III-producing). |
| Inulinase II. |
| Reaction catalysed |
|---|
| Produces alpha-D-fructofuranose beta-D-fructofuranose 1,2':2,3'-dianhydride (DFA III) by successively eliminating the diminishing (2->1)-beta-D-fructan (inulin) chain from the terminal D-fructosyl-D-fructosyl disaccharide |
| Comment(s) |
|---|
- This enzyme, like EC 4.2.2.16 and EC 4.2.2.17 eliminates the fructan
chain from the terminal disaccharide leaving a difructose
dianhydride.
- These enzymes have long been known as fructotransferases, so this is
retained in the description (official name).
- Since the transfer is intramolecular, the reaction is an elimination
and, hence, the enzyme is a lyase, belonging in enzyme class 4.-.-.-.
- Formerly EC 2.4.1.93.
|
| Cross-references |
|---|
| BRENDA | 4.2.2.18 |
| EC2PDB | 4.2.2.18 |
| ExplorEnz | 4.2.2.18 |
| PRIAM enzyme-specific profiles | 4.2.2.18 |
| KEGG Ligand Database for Enzyme Nomenclature | 4.2.2.18 |
| IUBMB Enzyme Nomenclature | 4.2.2.18 |
| IntEnz | 4.2.2.18 |
| MEDLINE | Find literature relating to 4.2.2.18 |
| MetaCyc | 4.2.2.18 |
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ENZYME /
UniProtKB/Swiss-Prot entries corresponding to 4.2.2.-
All
ENZYME /
UniProtKB/Swiss-Prot entries corresponding to 4.2.-.-
All
ENZYME /
UniProtKB/Swiss-Prot entries corresponding to 4.-.-.-