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<em>Rhodopseudomonas palustris</em> Strain CGA009 Produces an O-Antigen Built up by a C-4-Branched Monosaccharide: Structural and Conformational Studies
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Rhodopseudomonas palustris Strain CGA009 Produces an O-Antigen Built up by a C-4-Branched Monosaccharide: Structural and Conformational Studies

Roberta Marchetti, Emiliano Bedini, Djamel Gully, Rosa Lanzetta, Eric Giraud, Antonio Molinaro et Alba Silipo
Organic Letters, Vol.20(12), pp.3656-3660
2018
DOI: https://doi.org/10.1021/acs.orglett.8b01439
PMID: 29874087

Résumé

lps spectroscopie résonance magnétique nucléaire
Here, the analysis of the peculiar homopolymeric O-chain, isolated from the lipopolysaccharide (LPS) of Rhodopseudomonas palustris strain CGA009, is reported. The O-chain is built up of a novel 4-C-branched sugar (12-deoxy-4-C-(D-altro-5,7,8,9-tetrahydroxyhexyl))-3-O-methyl-D-galactopyranose)) whose structure, absolute configuration, and conformational features were deduced by 2D NMR spectroscopy, optical rotation measurements, and molecular dynamics simulations.

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