Mannose-1-phosphate guanylyltransferase

mannose-1-phosphate guanylyltransferase
Identifiers
EC number 2.7.7.13
CAS number 37278-24-3
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / EGO

In enzymology, a mannose-1-phosphate guanylyltransferase (EC 2.7.7.13) is an enzyme that catalyzes the chemical reaction

GTP + alpha-D-mannose 1-phosphate \rightleftharpoons diphosphate + GDP-mannose

Thus, 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). The systematic name of this enzyme class is GTP:alpha-D-mannose-1-phosphate guanylyltransferase. Other names in common use include GTP-mannose-1-phosphate guanylyltransferase, PIM-GMP (phosphomannose isomerase-guanosine 5'-diphospho-D-mannose, pyrophosphorylase), GDP-mannose pyrophosphorylase, guanosine 5'-diphospho-D-mannose pyrophosphorylase, guanosine diphosphomannose pyrophosphorylase, guanosine triphosphate-mannose 1-phosphate guanylyltransferase, and mannose 1-phosphate guanylyltransferase (guanosine triphosphate). This enzyme participates in fructose and mannose metabolism.

Structural studies

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 2CU2.

References