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1. (Article ID: 4798)
 
Shashkov AS, Senchenkova SN, Popova AV, Mei Z, Shneider MM, Liu B, Miroshnikov KA, Volozhantsev NV, Knirel YA
Revised structure of the capsular polysaccharide of Acinetobacter baumannii LUH5533 (serogroup O1), containing di-N-acetyllegionaminic acid
Russian Chemical Bulletin = Izvestiia Akademii nauk. Seriia khimicheskaia (5) (2015) 1196-1199
 

A glycopolymer classified as an O-specific polysaccharide had earlier been isolated from the multi-drug resistant nosocomial pathogen Acinetobacter baumannii LUH5533 (serogroup O1) and its chemical structure had been established. In the present work, we found that the glycopolymer was a capsular polysaccharide (CPS), its structure was revised, and 5,7-diacetamido-3,5,7,9-tetradeoxy-D-glycero-D-galacto-non-2-ulosonic acid (di-N-acetyllegionaminic acid) was identified as its component, which had been overlooked earlier. The revised structure is consistent with predicted functions of genes in the CPS biosynthesis cluster classified into the KL7 or PSgc1 group, which is present in the LUH 5533 genome.

Acinetobacter baumannii, capsular polysaccharide structure, legionaminic acid, polysaccharide biosynthesis gene claster

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