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Information on EC 2.4.1.161 - oligosaccharide 4-alpha-D-glucosyltransferase

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EC Tree
     2 Transferases
         2.4 Glycosyltransferases
             2.4.1 Hexosyltransferases
                2.4.1.161 oligosaccharide 4-alpha-D-glucosyltransferase
IUBMB Comments
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 , 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 . Unlike EC 2.4.1.25, 4-alpha-glucanotransferase, this enzyme can transfer only a single glucosyl residue.
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The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
Synonyms
1,4-alpha-glucan:1,4-alpha-glucan 4-alpha-glucosyltransferase, amylase III, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
(Glcalpha(1-4))n + (Glcalpha(1-4))m = (Glcalpha(1-4))n-1 + (Glcalpha(1-4))m+1
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