Tags: Enzyme.
In enzymology a glutaminyl-peptide cyclotransferase (EC 2.3.2.5) is an enzyme that catalyzes the chemical reactionL-glutaminyl-peptide 5-oxoprolyl-peptide + NH3Hence this enzyme has one substrate L-glutaminyl-peptide and two products 5-oxoprolyl-peptide and NH3.This enzyme belongs to the family of transferases specifically the aminoacyltransferases. The systematic name of this enzyme class is L-glutaminyl-peptide gamma-glutamyltransferase (cyclizing).