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Glycobiology Advance Access originally published online on July 28, 2006
Glycobiology 2006 16(12):1272-1280; doi:10.1093/glycob/cwl033
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© The Author 2006. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Core oligosaccharide structure from the highly phytopathogenic Agrobacterium tumefaciens TT111 and conformational analysis of the putative rhamnan epitope

Cristina De Castro1, Anna Carannante, Rosa Lanzetta, Valeria Liparoti, Antonio Molinaro and Michelangelo Parrilli

Department of Organic Chemistry and Biochemistry, University of Naples, Complesso Universitario Monte Sant’ Angelo, Via Cintia 4, 80126 Napoli, Italy

1 To whom correspondence should be addressed; e-mail: decastro{at}unina.it

Received on June 15, 2006; revised on July 26, 2006; accepted on July 27, 2006

The structure of the complex mixture of the core oligosaccharide components of the lipooligosaccharide (LOS) fraction of Agrobacterium tumefaciens strain TT111 was determined directly on the deacetylated products by means of spectroscopical methods. The rhamnan oligosaccharide elongating the inner Kdo residue shares structural features with other polysaccharides from well-known plant pathogenic bacteria. Its conformation was determined through extensive molecular dynamic (MD) analysis and presents an epitope similar to that recognized from the plant defense system.

Key words: conformation analysis / lipooligosaccharide / NMR spectroscopy / structure elucidation


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[Abstract] [PDF]


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