Structure of the N-glycans from the chlorovirus NE-JV-1

Authors

Immacolata Speciale, University of NapoliFollow
Irina Agarkova, University of Nebraska-LincolnFollow
Garry Duncan, Nebraska Wesleyan UniversityFollow
James L. Van Etten, University of Nebraska-LincolnFollow
Cristina De Castro, University of NapoliFollow

Document Type

Article

Date of this Version

2017

Citation

Published in Antonie van Leeuwenhoek 110 (2017), pp 1391–1399.

DOI 10.1007/s10482-017-0861-3

Comments

Copyright © 2017 Springer International Publishing Switzerland. Used by permission.

Abstract

Results from recent studies are breaking the paradigm that all viruses depend on their host machinery to glycosylate their proteins. Chloroviruses encode several genes involved in glycan biosynthesis and some of their capsid proteins are decorated with N-linked oligosaccharides with unique features. Here we describe the elucidation of the N-glycan structure of an unusual chlorovirus, NE-JV-1, that belongs to the Pbi group. The host for NE-JV-1 is the zoochlorella Micractinium conductrix. Spectroscopic analyses established that this N-glycan consists of a core region that is conserved in all of the chloroviruses. The one difference is that the residue 3OMe-l-rhamnose is acetylated at the O-2 position in a non-stoichiometric fashion.