Tags: Enzyme.
In enzymology a mannose-1-phosphate guanylyltransferase (EC 2.7.7.13) is an enzyme that catalyzes the chemical reactionGTP + alpha-D-mannose 1-phosphate diphosphate + GDP-mannoseThus the two substrates of this enzyme are GTP and alpha-D-mannose 1-phosphate whereas its two products are diphosphate and GDP-mannose.This enzyme belongs to the family of transferases specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases).