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FEBS Lett. 2014 Sep 17;588(18):3435-40. doi: 10.1016/j.febslet.2014.07.036. Epub 2014 Aug 7.

A rapid quantitative activity assay shows that the Vibrio cholerae colonization factor GbpA is an active lytic polysaccharide monooxygenase.

Author information

1
Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway.
2
Molecular Enzymology Group, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 4, Groningen, The Netherlands.
3
Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway. Electronic address: gustko@nmbu.no.

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.

KEYWORDS:

AA10; AA11; AA9; Colonization factor; GbpA; Lytic polysaccharide monooxygenase; Vibrio cholerae

PMID:
25109775
DOI:
10.1016/j.febslet.2014.07.036
[Indexed for MEDLINE]
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