Structure of the K82 Capsular Polysaccharide from Acinetobacter baumannii LUH5534 Containing a d-Galactose 4,6-Pyruvic Acid Acetal


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Abstract

Type K82 capsular polysaccharide (CPS) was isolated from Acinetobacter baumannii LUH5534. The structure of a linear tetrasaccharide repeating unit of the CPS was established by sugar analysis along with one- and two-dimensional 1H and 13C NMR spectroscopy. Proteins encoded by the KL82 capsule gene cluster in the genome of LUH5534 were assigned to roles in the synthesis of the K82 CPS. In particular, functions were assigned to two new glycosyltransferases (Gtr152 and Gtr153) and a novel pyruvyltransferase, Ptr5, responsible for the synthesis of D-galactose 4,6-(R)-pyruvic acid acetal.

About the authors

A. A. Kasimova

Zelinsky Institute of Organic Chemistry; Higher Chemical College of the Russian Academy of Sciences

Author for correspondence.
Email: nastia-kasimova979797@mail.ru
Russian Federation, Moscow, 119991; Moscow, 125047

J. J. Kenyon

School of Molecular Bioscience; Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Faculty of Health

Email: nastia-kasimova979797@mail.ru
Australia, Sydney, NSW, 2006; Brisbane, QLD, 4059

N. P. Arbatsky

Zelinsky Institute of Organic Chemistry

Email: nastia-kasimova979797@mail.ru
Russian Federation, Moscow, 119991

A. S. Shashkov

Zelinsky Institute of Organic Chemistry

Email: nastia-kasimova979797@mail.ru
Russian Federation, Moscow, 119991

A. V. Popova

Moscow Institute of Physics and Technology; State Research Center for Applied Microbiology and Biotechnology

Email: nastia-kasimova979797@mail.ru
Russian Federation, Dolgoprudny, Moscow Region, 141700; Obolensk, Moscow Region, 142279

Y. A. Knirel

Zelinsky Institute of Organic Chemistry

Email: nastia-kasimova979797@mail.ru
Russian Federation, Moscow, 119991

R. M. Hall

School of Molecular Bioscience; School of Life and Environmental Sciences

Email: nastia-kasimova979797@mail.ru
Australia, Sydney, NSW, 2006; Sydney, NSW, 2006


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