ENZYME entry: EC 4.2.2.13
| Accepted Name |
|---|
| Exo-(1->4)-alpha-D-glucan lyase.
|
| Alternative Name(s) |
|---|
| Alpha-1,4-glucan 1,5-anhydro-D-fructose eliminase. |
| Alpha-1,4-glucan exo-lyase. |
| Alpha-1,4-glucan lyase. |
| Exo-(1,4)-alpha-D-glucan lyase. |
| Exo-alpha-1,4-glucan lyase. |
| Reaction catalysed |
|---|
| Linear alpha-glucan <=> (n-1) 1,5-anhydro-D-fructose + D-glucose |
| Comment(s) |
|---|
- Catalyzes the sequential degradation of (1->4)-alpha-D-glucans from
the non-reducing end with the release of 1,5-anhydro-D-fructose.
- Thus, for an alpha-glucan containing n (1->4)-linked glucose units,
the final products are 1 glucose plus (n-1) 1,5-anhydro-D-fructose.
- Maltose, maltosaccharides and amylose are all completely degraded.
- Does not degrade (1->6)-alpha-gucosidic bonds and thus the
degradation of a branched glucan, such as amylopectin or glycogen,
will result in the formation of 1,5-anhydro-D-fructose plus a limit
dextrin.
- Other enzymes involved in the anhydrofructose pathway are
EC 4.2.1.110, EC 4.2.1.111 and EC 5.3.3.15.
|
| Cross-references |
|---|
| BRENDA | 4.2.2.13 |
| EC2PDB | 4.2.2.13 |
| ExplorEnz | 4.2.2.13 |
| PRIAM enzyme-specific profiles | 4.2.2.13 |
| KEGG Ligand Database for Enzyme Nomenclature | 4.2.2.13 |
| IUBMB Enzyme Nomenclature | 4.2.2.13 |
| IntEnz | 4.2.2.13 |
| MEDLINE | Find literature relating to 4.2.2.13 |
| MetaCyc | 4.2.2.13 |
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UniProtKB/Swiss-Prot entries corresponding to 4.2.2.-
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