EC 2.7.7.34     
Accepted name: glucose-1-phosphate guanylyltransferase
Reaction: GTP + α-D-glucose 1-phosphate = diphosphate + GDP-glucose
Other name(s): GDP glucose pyrophosphorylase; guanosine diphosphoglucose pyrophosphorylase
Systematic name: GTP:α-D-glucose-1-phosphate guanylyltransferase
Comments: Also acts, more slowly, on D-mannose 1-phosphate.
References:
1.  Danishefsky, I. and Heritier-Watkins, O. Nucleoside diphosphate glucose pyrophosphorylases in mast cell tumors. Biochim. Biophys. Acta 139 (1967) 349–357. [PMID: 6034677]
[EC 2.7.7.34 created 1972]