title: Flavobacterium meningosepticum peptide:N-glycosidase: influence of ionic strength on enzymatic activity.
abstract: Flavobacterium meningosepticum peptide:N-glycosidase-mediated deglycosylation of N-linked glycan strands of glycoproteins has been found to be strongly influenced by the ionic strength of the assay medium. By use of a modification of a previously published assay procedure for quantitative analysis of glycan release we have been able to improve reproducibility and thus to compare the extent of deglycosylation achieved under a variety of conditions of ionic strength. We have observed that enzyme activity is adversely affected by high ionic strength buffers such as those recommended for deglycosylation of various glycoproteins and recommend the use of low ionic strength buffers for routine use.
authors.affiliation: Guelph-Waterloo Centre for Graduate Work in Chemistry, University of Waterloo, Ontario, Canada.
authors.forename: S
authors.initials: S
authors.lastname: Gosselin
authors.forename: B M
authors.initials: BM
authors.lastname: Martin
authors.forename: G J
authors.initials: GJ
authors.lastname: Murray
authors.forename: T
authors.initials: T
authors.lastname: Viswanatha
mesh_terms: D000581:Amidohydrolases / Q000737:chemistry*; D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry*; D002384:Catalysis; D003470:Culture Media; D005417:Flavobacterium / Q000737:chemistry / Q000201:enzymology*; D006023:Glycoproteins / Q000737:chemistry; D006031:Glycosylation; D008969:Molecular Sequence Data; D009994:Osmolar Concentration; D043524:Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase; D011134:Polysaccharides / Q000378:metabolism; D013379:Substrate Specificity
chemical_list: D001426:Bacterial Proteins; D003470:Culture Media; D006023:Glycoproteins; D011134:Polysaccharides; D000581:Amidohydrolases; D043524:Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase