Structural characterisation of the oligosaccharide from Moraxella bovoculi type strain 237 (ATCC BAA-1259) lipooligosaccharide

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Grice, ID
Peak, IR
Dawood, WA
King, RM
Ravikumaran, KS
Speciale, I
Molinaro, A
de Castro, C
Wilson, JC
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2021
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Abstract

The Gram-negative bacterium Moraxella bovoculi is associated with infectious bovine keratoconjunctivitis (IBK), colloquially known as ‘pink-eye’. IBK is an extremely contagious ocular disease of cattle. We report here the structure of the oligosaccharide derived from the lipooligosaccharide from M. bovoculi type strain 237 (also known as ATCC BAA-1259T). GLC-MS and correlation NMR analysis of the oligosaccharide revealed 5 sugar residues, with a notable central branched 3,4,6-α-D-Glcp. An additional α-D-Manp was present ~30% on the sub-terminal α-D-Manp of the 4-linked branch. This oligosaccharide structure was consistent with other members of the Moraxellaceae where no heptose was present and 5-linked Kdo was directly attached to the central 3,4,6-α-D-Glcp.

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Carbohydrate Research

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503

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Medicinal and biomolecular chemistry

Organic chemistry

Biochemistry and cell biology

Microbiology

Infectious agents

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Grice, ID; Peak, IR; Dawood, WA; King, RM; Ravikumaran, KS; Speciale, I; Molinaro, A; de Castro, C; Wilson, JC, Structural characterisation of the oligosaccharide from Moraxella bovoculi type strain 237 (ATCC BAA-1259) lipooligosaccharide, Carbohydrate Research, 2021, 503, pp. 108293

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