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Updated: Apr 27, 2026

Pulse-chase Analysis of N-linked Sugar Chains from Glycoproteins in Mammalian Cells
Published on: April 27, 2010
N-glycosylation is required for secretion and enzymatic activity of human hyaluronidase1
Yuki Goto1, Yuki Niwa1, Takehiro Suzuki2
1Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama 223-8522, Japan.
Abstract:
Hyaluronidase1 (HYAL1) is a hydrolytic enzyme that degrades hyaluronic acid (HA) and has three predicted N-glycosylation sites at Asn(99), Asn(216), and Asn(350). In this report, we show the functional significance of N-glycosylation on HYAL1 functions. Using mass spectrometry, we demonstrated that HYAL1 was N-glycosylated at the three asparagine residues. N-glycosylation of HYAL1 is important for secretion of HYAL1, as demonstrated by site-directed mutation. Moreover, a defect of N-glycosylation attenuated the enzymatic activity of HYAL1. Thus, HYAL1 is N-glycosylated at the three asparagine residues, and its secretion and enzymatic activity are regulated by N-glycosylation.
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