| glucose-1-phosphate guanylyltransferase | |
| Ec Number: | 2.7.7.34 |
| Cas Number: | 9033-13-0 |
| Go Code: | 0047344 |
In enzymology, a glucose-1-phosphate guanylyltransferase is an enzyme that catalyzes the chemical reaction
GTP + alpha-D-glucose 1-phosphate
\rightleftharpoons
Thus, the two substrates of this enzyme are GTP and alpha-D-glucose 1-phosphate, whereas its two products are diphosphate and GDP-glucose.
This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is GTP:alpha-D-glucose-1-phosphate guanylyltransferase. Other names in common use include GDP glucose pyrophosphorylase, and guanosine diphosphoglucose pyrophosphorylase. This enzyme participates in starch and sucrose metabolism.