sucrose-1,6-alpha-glucan 3(6)-alpha-glucosyltransferase EC#: 2.4.1.125; ChemWhat Code: 1377410
| Product Name | sucrose-1,6-alpha-glucan 3(6)-alpha-glucosyltransferase |
| Example Structure |  |
| Synonyms | glucosyltransferase, sucrose-1,6-alpha-glucan 3(6)-alpha-, GTF-S, sucrose:1,6-, 1,3-alpha-D-glucan 3-alpha- and 6-alpha-D-glucosyltransferase, sucrose:1,6-alpha-D-glucan 3-alpha- and 6-alpha-glucosyltransferase, sucrose:1,6-alpha-glucan 3(6)-alpha-glucosyltransferase, water-soluble-glucan synthase |
| EC Number | 2.4.1.125 |
| CAS Registry Number | 81725-87-3 |
| Comments | The enzyme was characterized from the dental caries bacterium Streptococcus mutans. It transfers glucosyl residues from sucrose to either the 6- or the 3-positions of glucose residues in glucans, producing a highly-branched extracellular D-glucan polymers that promote attachment of the bacteria to teeth. Three types of the enzyme have been described; the insoluble polymers produced by GTF-I and GTF-SI contain 85% ¦Á(1¡ú3) bonds and 15% ¦Á(1¡ú6) bonds, while the soluble polymers produced by GTF-S contain only 30% of ¦Á(1¡ú3) bonds and 70% ¦Á(1¡ú6) bonds. cf. EC 2.4.1.5, dextransucrase [5]. |
| Cofactor | |
| History | |
| Reactions | (1) Sucrose + ((1->6)-alpha-D-glucosyl)(n) = D-fructose + ((1->6)-alpha- D-glucosyl)(n+1). (2) Sucrose + ((1->6)-alpha-D-glucosyl)(n) = D-fructose + (1->3)-alpha-D- glucosyl((1->6)-alpha-D-glucosyl)(n). |
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