Structure of the O-antigen polysaccharide present in the lipopolysaccharide of Cronobacter dublinensis (subspecies lactaridi or lausannensis) HPB 3169

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DOIResolve DOI: http://doi.org/10.1139/W2012-022
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TypeArticle
Journal titleCanadian Journal of Microbiology
ISSN0008-4166
Volume58
Issue4
Pages540546; # of pages: 7
Subject3 deoxy manno octulosonic acid; 3 hydroxybutyric acid; 3,6 dideoxy 3 3 hydroxybutyramido dextro glucose; bacterium lipopolysaccharide; glucose derivative; n acetylglucosamine; O antigen; pentasaccharide; polymer; rhamnose; unclassified drug; antigen; bacterium; nuclear magnetic resonance; pathogen; polymer; polysaccharide; antigen structure; article; bacterial growth; bacterium isolation; carbohydrate analysis; Cronobacter dublinensis; hydrolysis; molecular weight; nonhuman; nuclear magnetic resonance; peroxidation; priority journal; Acetylglucosamine; Amino Acid Sequence; Carbohydrate Sequence; Cronobacter; Glucose; Hydrolysis; Lipopolysaccharides; Magnetic Resonance Spectroscopy; O Antigens; Oligosaccharides; Bacteria (microorganisms); Enterobacter sakazakii; Negibacteria
AbstractCronobacter dublinensis (formerly Enterobacter sakazakii) HPB 3169 is a pathogenic Gram-negative bacterium that produces a smooth-type lipopolysaccharide in which the antigenic O-polysaccharide component was determined to be a repeating pentasaccharide unit composed of L-rhamnose; 2-acetamido-2-deoxy-D-glucose; 3,6-dideoxy-3-(R)-3-hydroxybutyramido-Dglucose; and 3-deoxy-manno-oct-2-ulosonic acid in the respective molar ratio 2:1:1:1. Chemical and 2D NMR analyses of the O-polysaccharide and a pentasaccharide derived by the mild acid hydrolysis of the ketosyl linkage of the Kdo (3-deoxy-D-manno-2-octulosonic acid) residue in the O-polysaccharide established that the O-antigen is a high molecular mass unbranched polymer of a repeating pentasaccharide unit and has the structure where Bu is a (R)-3-hydroxybutanoyl substituent. The O-antigen is structurally similar to that of the recently reported Cronobacter sakazakii strain G706 (designated as serotype O5), except that in strain G706 the D-Qui3N is in its N-acetyl form, in contrast to its presence as a 3-deoxy-3-(R)-3-hydroxybutyramido derivative in the C. sakazakii HPB 3169 strain O-antigen.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Biological Sciences (IBS-ISB)
Peer reviewedYes
NPARC number21269295
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Record identifier592b7849-d4ca-444b-a261-f0b199aefac1
Record created2013-12-12
Record modified2016-05-09
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