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Carbohydr Res. 2008 Jun 9;343(8):1383-9. doi: 10.1016/j.carres.2008.04.003. Epub 2008 Apr 7.

Structural studies of the O-antigens of Yersinia pseudotuberculosis O:2a and mutants thereof with impaired 6-deoxy-D-manno-heptose biosynthesis pathway.

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  • 1ND Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia.


The full structure of the long- and short-chain O-antigen of Yersinia pseudotuberculosis O:2a containing two uncommon deoxy sugars, abequose and 6-deoxy-d-manno-heptose (6dmanHep), was established, for the first time, by sugar analysis, NMR spectroscopy, and high-resolution ESIMS. Similar structural studies were also performed on two O:2a mutants with single disruption of 6dmanHep synthesis pathway genes each, which synthesize modified long-chain (dmhA mutant) and short-chain (both dmhA and dmhB mutants) O-antigens with 6dmanHep replaced by its putative biosynthetic precursor, D-glycero-D-manno-heptose.

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