| EC |
3.2.1.68 |
| Accepted name: |
isoamylase |
| Reaction: |
Hydrolysis of (1→6)-α-D-glucosidic branch linkages in glycogen, amylopectin and their β-limit dextrins |
| Glossary: |
pullulan = a linear polymer of (1→6)-linked maltotriose units |
| Other name(s): |
debranching enzyme; glycogen α-1,6-glucanohydrolase |
| Systematic name: |
glycogen 6-α-D-glucanohydrolase |
| Comments: |
Also readily hydrolyses amylopectin. Differs from EC 3.2.1.41 (pullulanase) and EC 3.2.1.142 (limit dextrinase) by its inability to hydrolyse pullulan, and by limited action on α-limit dextrins. Maltose is the smallest sugar it can release from an α-(1→6)-linkage. |
| Links to other databases: |
BRENDA, EXPASY, Gene, KEGG, MetaCyc, PDB, CAS registry number: 9067-73-6 |
| References: |
| 1. |
Yokobayashi, K., Misaki, A. and Harada, T. Purification and properties of Pseudomonas isoamylase. Biochim. Biophys. Acta 212 (1970) 458–469. [DOI] [PMID: 5456995] |
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| [EC 3.2.1.68 created 1972, modified 1976, modified 2000] |
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