Oligosaccharide specificity of influenza H1N1 virus neuraminidases

Oligosaccharide specificity of influenza H1N1 virus neuraminidases A fluorescent neuraminidase (NA) assay has been developed; 20 samples in five replicates could be analyzed at the same time, allowing us to study the kinetics of the enzyme-substrate interaction. The specificities of six influenza H1N1 virus NAs for BODIPY-labeled 3′SiaLac, 3′SiaLacNAc, SiaLe c , SiaLe a , 6′SiaLac, and 6′SiaLacNAc were evaluated. The duck virus NA hydrolyzed 6′SiaLac and 6′SiaLacNAc 50 times more slowly than 2–3 isomers. Swine viruses digested SiaLe a and 2–6 sialosides 20 times more slowly than 2–3 trisaccharides. For the human viruses, the difference between 2–6 and 2–3 oligosaccharides desialylation efficiency did not exceed five times; notably, the inner core of 2–3 sialosaccharide was discriminated. The results are evidence that influenza virus NAs can distinguish substrate structure at the tri- and tetrasaccharide level. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Oligosaccharide specificity of influenza H1N1 virus neuraminidases

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Publisher
Springer-Verlag
Copyright
Copyright © 2007 by Springer-Verlag
Subject
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-007-1024-z
Publisher site
See Article on Publisher Site

Abstract

A fluorescent neuraminidase (NA) assay has been developed; 20 samples in five replicates could be analyzed at the same time, allowing us to study the kinetics of the enzyme-substrate interaction. The specificities of six influenza H1N1 virus NAs for BODIPY-labeled 3′SiaLac, 3′SiaLacNAc, SiaLe c , SiaLe a , 6′SiaLac, and 6′SiaLacNAc were evaluated. The duck virus NA hydrolyzed 6′SiaLac and 6′SiaLacNAc 50 times more slowly than 2–3 isomers. Swine viruses digested SiaLe a and 2–6 sialosides 20 times more slowly than 2–3 trisaccharides. For the human viruses, the difference between 2–6 and 2–3 oligosaccharides desialylation efficiency did not exceed five times; notably, the inner core of 2–3 sialosaccharide was discriminated. The results are evidence that influenza virus NAs can distinguish substrate structure at the tri- and tetrasaccharide level.

Journal

Archives of VirologySpringer Journals

Published: Oct 1, 2007

References

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