Structural and conformational study of the O-polysaccharide produced by the metabolically versatile photosynthetic bacterium Rhodopseudomonas palustris strain BisA53

•Rhodopseudomonas palustris is a photosynthetic metabolically versatile bacterium.•The LPS O-polysaccharide from R. palustris has been extracted and purified.•This strain produced a polymer with a trisaccharide repeating unit and a new sugar.•NMR spectroscopy and molecular mechanic and dynamic simul...

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