The effect of alkaline borohydride treatment on N-linked carbohydrates of glycoproteins.
Publication/Presentation Date
1-1-1989
Abstract
The effects of treatments of the glycoprotein ribonuclease-B, the proteins ribonuclease-A and myoglobin, and the glyco-amino acid GlcNAc beta(1-N)Asn with alkali, alkaline sodium borohydride, and aqueous sodium borohydride were systematically studied as a function of the concentration of the reagents, the temperature, and the length of the treatment. High-field 1H-NMR spectroscopy, chromatographic methods and amino-acid analysis were used to characterize products of the treatments of the various compounds. Our results indicate that mild alkaline borohydride treatment, as well as aqueous borohydride treatment alone, is capable of extensively degrading polypeptides and of partially releasing the N-linked glycans from ribonuclease-B. Initially, glycopeptides are produced, the peptide portion of which consists of several amino acids, which are further hydrolyzed to yield a mixture of glyco-asparagines and oligosaccharide-alditols in the ratio of approximately 4:1. Strong alkaline borohydride treatment of ribonuclease-B is capable of completely releasing the N-linked carbohydrates as oligosaccharide-alditols.
Volume
6
Issue
1
First Page
45
Last Page
56
ISSN
0282-0080
Published In/Presented At
Argade, S. P., Daves, G. D., Jr, Van Halbeek, H., & Alhadeff, J. A. (1989). The effect of alkaline borohydride treatment on N-linked carbohydrates of glycoproteins. Glycoconjugate journal, 6(1), 45–56. https://doi.org/10.1007/BF01047889
Disciplines
Medicine and Health Sciences
PubMedID
2535476
Department(s)
Department of Medicine
Document Type
Article