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Glycobiology Advance Access originally published online on October 27, 2004
Glycobiology 2005 15(3):313-321; doi:10.1093/glycob/cwi009
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Glycobiology vol. 15 no. 3 © Oxford University Press 2005; all rights reserved.

Nitrogen-fixing bacterium Burkholderia brasiliensis produces a novel yersiniose A–containing O-polysaccharide

Katherine A. Mattos2, Adriane R. Todeschini2, Norton Heise2, Christopher Jones3, Jose O. Previato2 and Lucia Mendonça-Previato1,2

2 Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Bloco G, Universidade Federal do Rio de Janeiro, 21944-970, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, Brazil; and 3 Laboratory for Molecular Structure, NIBSC, Herts EN6 3QG, U.K.

1 To whom correspondence should be addressed; e-mail: luciamp{at}biof.ufrj.br

Received on September 29, 2004; revised on October 20, 2004; accepted on October 20, 2004

Burkholderia brasiliensis, a Gram-negative diazotrophic endophytic bacterium, was first isolated from roots, stems, and leaves of rice plant in Brazil. The polysaccharide moiety was released by ammonolysis from the B. brasiliensis lipopolysaccharide (LPS), allowing the unambiguous characterization of a 3,6-dideoxy-4-C-(1-hydroxyethyl)-D-xylo-hexose (yersiniose A), an uncommon feature for Burkholderia LPS. The complete structure of the yersiniose A–containing O-antigen was identified by sugar and methylation analyses and NMR spectroscopy. Our results show that the repeating oligosaccharide motif of LPS O-chain consists of a branched tetrasaccharide with the following structure:->2-{alpha}-D-Rhap-(1->3)-[{alpha}-YerAp-(1->2)]-{alpha}-D-Rhap-(1->3)-{alpha}-D-Rhap-(1->.

Key words: Burkholderia / lipopolysaccharide / nitrogen-fixing bacterium / yersiniose


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