2.4.1.161: oligosaccharide 4-alpha-D-glucosyltransferase

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For detailed information about oligosaccharide 4-alpha-D-glucosyltransferase, go to the full flat file.

Reaction

Synonyms

1,4-alpha-glucan:1,4-alpha-glucan 4-alpha-glucosyltransferase, amylase III

ECTree

2 Transferases

2.4 Glycosyltransferases

2.4.1 Hexosyltransferases

2.4.1.161 oligosaccharide 4-alpha-D-glucosyltransferase

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89	AA Sequence
1	CAS Registry Number
2	Inhibitors
1	Molecular Weight [Da]
3	Natural Substrates/ Products (Substrates)
2	Organism
8	PDB ID
1	pH Optimum
1	Purification (Commentary)
1	Reaction
1	Reaction Type
2	Reference
1	Source Tissue
6	Substrates and Products (Substrate)
2	Synonyms
1	Systematic Name
1	Temperature Optimum [°C]

Systematic Name

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Systematic Name on EC 2.4.1.161 - oligosaccharide 4-alpha-D-glucosyltransferase

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(1->4)-alpha-D-glucan:(1->4)-alpha-D-glucan 4-alpha-D-glucosyltransferase

The enzyme acts on amylose, amylopectin, glycogen and maltooligosaccharides. No detectable free glucose is formed, indicating the enzyme does not act as a hydrolase. The enzyme from the bacterium Cellvibrio japonicus has the highest activity with maltotriose as a donor, and also accepts maltose [3], while the enzyme from amoeba does not accept maltose [1,2]. Oligosaccharides with 1->6 linkages cannot function as donors, but can act as acceptors [3]. Unlike EC 2.4.1.25, 4-alpha-glucanotransferase, this enzyme can transfer only a single glucosyl residue.