Term Name:	glutaminyl-peptide cyclotransferase activity
Synonyms:	glutaminyl cyclase activity, glutaminyl-transfer ribonucleate cyclotransferase activity, glutaminyl-tRNA cyclotransferase activity, L-glutaminyl-peptide gamma-glutamyltransferase (cyclizing)
Definition:	Catalysis of the reaction: N-terminal L-glutaminyl-[peptide] = N-terminal 5-oxo-L-prolyl-[peptide] + NH4+.
Ontology:	GO: Molecular Function [GO:0016603]    QuickGO    AmiGO