Sucrose-1,6-alpha-glucan 3(6)-alpha-glucosyltransferase

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In enzymology, a sucrose-1,6-alpha-glucan 3(6)-alpha-glucosyltransferase (EC 2.4.1.125) is an enzyme that catalyzes the chemical reaction

sucrose + (1,6-alpha-D-glucosyl)n $\rightleftharpoons$ D-fructose + (1,6-alpha-D-glucosyl)n⁺1

Thus, the two substrates of this enzyme are sucrose and (1,6-alpha-D-glucosyl)n, whereas its two products are D-fructose and (1,6-alpha-D-glucosyl)n+1.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is sucrose:1,6-alpha-D-glucan 3(6)-alpha-D-glucosyltransferase. Other names in common use include water-soluble-glucan synthase, GTF-S, sucrose-1,6-alpha-glucan 3(6)-alpha-glucosyltransferase, sucrose:1,6-alpha-D-glucan 3-alpha- and 6-alpha-glucosyltransferase, sucrose:1,6-, 1,3-alpha-D-glucan 3-alpha- and, and 6-alpha-D-glucosyltransferase.

[edit] References

IUBMB entry for 2.4.1.125
BRENDA references for 2.4.1.125 (Recommended.)
PubMed references for 2.4.1.125
PubMed Central references for 2.4.1.125
Google Scholar references for 2.4.1.125
Mukasa H, Shimamura A, Tsumori H (1982). "Purification and characterization of basic glucosyltransferase from Streptococcus mutans serotype c". Biochim. Biophys. Acta. 719: 81–9. PMID 6216919.
Shimamura A, Tsumori H, Mukasa H (1982). "Purification and properties of Streptococcus mutans extracellular glucosyltransferase". Biochim. Biophys. Acta. 702: 72–80. PMID 6461359.
Tsumori H, Shimamura A, Mukasa H (1985). "Purification and properties of extracellular glucosyltransferase synthesizing 1,6-, 1,3-alpha-D-glucan from Streptococcus mutans serotype a". J. Gen. Microbiol. 131: 3347–53. PMID 2937877.