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Characterisation of the α-(1→3) Homopolymer of L-glycero-D-manno-Heptose Units Isolated from the O-Chain Polysaccharide of Agrobacterium radiobacter

✍ Scribed by Cristina De Castro; Luisa Sturiale; Michelangelo Parrilli

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 159 KB
Volume: 2004
Category: Article
ISSN: 1434-193X
DOI: 10.1002/ejoc.200400002

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✦ Synopsis

Abstract

This paper provides the first report of the molecular primary structure of the O‐chain produced from A. radiobacter group M2−1. The repeating unit was determined, by means of chemical and spectroscopical analyses, to have the following structure: [3)‐α‐L‐glycero‐D‐manno‐heptose‐(1→]~n~. The relevant feature of this structure is represented by the particular residue involved: L‐glycero‐D‐manno‐heptose. This monosaccharide is almost ubiquitous in Gram‐negative bacteria, but it is exclusively located in the Core region and only in one other case has it is reported as an O‐chain constituent. The knowledge of the chemical structure of the O‐chain of A. radiobacter will be useful for comprehending the bacterium‐host recognition mechanism at the molecular level. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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