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Updated: Apr 26, 2026

Laboratory Techniques Used to Maintain and Differentiate Biotypes of Vibrio cholerae Clinical and Environmental Isolates
Published on: May 30, 2017
A rapid quantitative activity assay shows that the Vibrio cholerae colonization factor GbpA is an active lytic
Jennifer S M Loose1, Zarah Forsberg1, Marco W Fraaije2
1Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway.
Abstract:
The discovery of the copper-dependent lytic polysaccharide monooxygenases (LPMOs) has revealed new territory for chemical and biochemical analysis. These unique mononuclear copper enzymes are abundant, suggesting functional diversity beyond their established roles in the depolymerization of biomass polysaccharides. At the same time basic biochemical methods for characterizing LPMOs, such as activity assays are not well developed. Here we describe a method for quantification of C1-oxidized chitooligosaccharides (aldonic acids), and hence LPMO activity. The method was used to quantify the activity of a four-domain LPMO from Vibriocholerae, GbpA, which is a virulence factor with no obvious role in biomass processing.
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