EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
2.4.1.18 | amylopectin |
- |
Escherichia coli |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
- |
Neurospora crassa |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
- |
Zea mays |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
- |
Solanum tuberosum |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
- |
Sorghum bicolor |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
enzyme form SBE II is more active than enzyme form SBE I. The enzyme forms SBE I and SBE II mainly branch the dextrins by intrachain branching.The products of SBE I show distinct populations at DP11-12 and DP29-30. The products of enzyme form SBE II habe one, broader, population with a peak at DP13-14. An accumulation of 6-7 chains is seen with both isoforms |
Solanum tuberosum |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
the enzyme cyclizes the B-chain which connects the cluster structures of amylopectin. The product, highly branched cyclic dextrin, has a ring structure with DPw 50 and non-cyclic chains with an average unit chain length of 16 connected to the ring |
Aquifex aeolicus |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
the C-terminal regions of isoenzyme PvSBE1 and PvSBE2 have different roles in branching enzyme activity. The C-terminal region of PvSBE1 confers specificity to amylose while that of PvSBE2 confers specificity to the transfer of short chains |
Phaseolus vulgaris |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
the wild-type enzyme transfers mainly chains with a degree of polymerization of 8-14, the mutant enzyme DELTA1-112 transfers a greater propertion of chains with higher degree of polymerization, 15-20. Mutant DELTA1-63 and mutant DELTA1-83 have an intermediate pattern of transferred chains, 10-20. A progressive shortening of the N-terminus leads to a gradual increase in the length of the transferred chains |
Escherichia coli |
amylopectin with additional alpha-1,6-glucosidic linkages |
- |
? |
2.4.1.18 | amylopectin |
- |
Triticum aestivum |
? |
- |
? |