2.4.1.24: 1,4-alpha-glucan 6-alpha-glucosyltransferase
This is an abbreviated version!
For detailed information about 1,4-alpha-glucan 6-alpha-glucosyltransferase, go to the full flat file.
Word Map on EC 2.4.1.24
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2.4.1.24
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phosphorylase
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mutans
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polyglucose
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water-insoluble
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transglucosidase
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d-glucans
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maltooligosaccharides
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paraboloid
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synthesis
- 2.4.1.24
- phosphorylase
- mutans
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polyglucose
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water-insoluble
- transglucosidase
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d-glucans
- maltooligosaccharides
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paraboloid
- synthesis
Reaction
Synonyms
(1->4)-alpha-D-glucan:(1->4)-alpha-D-glucan(D-glucose) 6-alpha-D-glucosyltransferase, 1,4-alpha-D-glucan 6-alpha-D-glucosyltransferase, 1,4-alpha-glucan 6-alpha-glucosyltransferase, 6-glucosyltransferase, alpha-Glucosyltransferase, branching glycosyltransferase, D-glucosyltransferase, glycogen g-alpha-D-glucanohydrolase, GTU, oligoglucan-branching glycosyltransferase, T-enzyme, transglucosidase
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Substrates Products
Substrates Products on EC 2.4.1.24 - 1,4-alpha-glucan 6-alpha-glucosyltransferase
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REACTION DIAGRAM
sucrose
fructose + glucose
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contains additionally tri- and tetrasaccharides
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D-glucose
glucose oligomers
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synthesis of glucose oligomers
product is nigeran
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D-glucose
glucose oligomers
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synthesis of glucose oligomers
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D-glucose + isomaltose + panose
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mixture contained further traces of several unidentified sugars
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maltose
D-glucose + isomaltose + panose
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reverse reaction of glucose oligomer synthesis
only glucose detected as reaction product
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maltose
D-glucose + isomaltose + panose
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reverse reaction of glucose oligomer synthesis
only glucose detected as reaction product
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D-xylose, D-fructose, D-sorbitol, maltose, sucrose, starch and inulin are found to be precursors of nigeran synthesis although hydrolysates of nigeran exclusively contain glucose and in case of starch and inulin traces of fructose
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additional information
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synthesis of oligosaccharides synthesized from a mixture of maltoheptaose and maltose, several types of oligosaccharides with degree of polymerization 2 to 8 containing alpha-D-Glcp-(1,6)-maltoheptaose are formed at 15°C, LC-MS and methylation product analysis, overview. Most of these compounds consist of alpha-(1,4) linkages in the main chain and alpha-(1,6) linkages at the non-reducing ends. However, when the reaction mixture is incubated for 96 h, most of these products were converted into oligosaccharides with DP2 to DP5 consisting of only alpha-(1,6) linkages. Thus, the transglucosidase rapidly transfers glucosyl residues to maltooligosaccharides, and gradually hydrolyzes both alpha-(1,4) linkages and alpha-(1,6) linkages at the non-reducing end, and transforms these into smaller molecules of mainly alpha-(1,6) linkages
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additional information
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the enzyme catalyzes the transfer of an alpha-D-glucosyl residue in a 1,4-alpha-D-glucan to the primary hydroxyl group of free glucose or glucose residues in 1,4-alpha-D-glucans
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