A Systematic Study of Site-specific GalNAc-type O-Glycosylation Modulating Proprotein Convertase Processing

Abstract

Background: GalNAc-type O-glycosylation is emerging as a co-regulator of proprotein convertase processing of proteins. Results: O-Glycosylation within at least 3 residues of the RXXR substrate motif for furin affected processing. Conclusion: Site-specific O-glycosylation by 20 polypeptide GalNAc transferases have wide co-regulatory functions in proprotein processing. Significance: This is the first systematic study that paves the way for wider co-regulatory functions of O-glycosylation in protein processing.