A new class EC 7, Translocases, has been added to the EC list. It will be part of ENZYME from release 2018_10. Read more about EC 7 here.
ENZYME entry: EC 4.2.2.17
| Accepted Name |
|---|
| Inulin fructotransferase (DFA-I-forming).
|
| Alternative Name(s) |
|---|
| Inulin D-fructosyl-D-fructosyltransferase (1,2':1',2-dianhydride-
forming). |
| Inulin D-fructosyl-D-fructosyltransferase (forming alpha-D-fructofuranose
beta-D-fructofuranose 1,2':1',2-dianhydride). |
| Inulin fructotransferase (depolymerizing, difructofuranose-1,2':2',1-
dianhydride-forming). |
| Inulin fructotransferase (DFA-I-producing). |
| Reaction catalysed |
|---|
| 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 |
| Comment(s) |
|---|
- This enzyme, like EC 4.2.2.16 and EC 4.2.2.18 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 2.4.1.200.
|
| Cross-references |
|---|
| BRENDA | 4.2.2.17 |
| EC2PDB | 4.2.2.17 |
| ExplorEnz | 4.2.2.17 |
| PRIAM enzyme-specific profiles | 4.2.2.17 |
| KEGG Ligand Database for Enzyme Nomenclature | 4.2.2.17 |
| IUBMB Enzyme Nomenclature | 4.2.2.17 |
| IntEnz | 4.2.2.17 |
| MEDLINE | Find literature relating to 4.2.2.17 |
| MetaCyc | 4.2.2.17 |
| UniProtKB/Swiss-Prot |
|
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All
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.-.-.-