NDP-glucose-starch glucosyltransferase

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In enzymology, a NDP-glucose-starch glucosyltransferase (EC 2.4.1.242) is an enzyme that catalyzes the chemical reaction

NDP-glucose + (1,4-alpha-D-glucosyl)n $\rightleftharpoons$ NDP + (1,4-alpha-D-glucosyl)n⁺1

Thus, the two substrates of this enzyme are NDP-glucose and (1,4-alpha-D-glucosyl)n, whereas its two products are NDP and (1,4-alpha-D-glucosyl)n+1.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is NDP-glucose:1,4-alpha-D-glucan 4-alpha-D-glucosyltransferase. Other names in common use include granule-bound starch synthase, starch synthase II (ambiguous), waxy protein, starch granule-bound nucleoside diphosphate glucose-starch, glucosyltransferase, granule-bound starch synthase I, GBSSI, granule-bound starch synthase II, GBSSII, GBSS, and NDPglucose-starch glucosyltransferase.

[edit] References

IUBMB entry for 2.4.1.242
BRENDA references for 2.4.1.242 (Recommended.)
PubMed references for 2.4.1.242
PubMed Central references for 2.4.1.242
Google Scholar references for 2.4.1.242
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Murai J, Taira T, Ohta D (1999). "Isolation and characterization of the three Waxy genes encoding the granule-bound starch synthase in hexaploid wheat". Gene. 234: 71–9. doi:10.1016/S0378-1119(99)00178-X. PMID 10393240.
Nelson OE (1968). "The waxy locus in maize. II The location of the controlling element alleles". Genetics 60: 507–524.