Abstract

Chloroviruses produce a capsid protein containing N-linked glycans differing in structure from those found in all other organisms. These species feature a core "hyper-branched" fucose residue in which every hydroxyl group is glycosylated. We describe the synthesis of a nonasaccharide from Paramecium bursaria chlorella virus 1, one of most complex chlorovirus N-glycans reported, using a "counterclockwise" strategy involving the sequential addition of trisaccharide, disaccharide, and monosaccharide motifs to a trisaccharide containing the core fucose residue.

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