Acinetobacter baumannii K106 and K112: Two Structurally and Genetically Related 6-Deoxy-l-talose-Containing Capsular Polysaccharides
In: International Journal of Molecular Sciences; Volume 22; Issue 11; Pages: 5641, 2021
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Zugriff:
Whole genome sequences of two Acinetobacter baumannii clinical isolates, 48-1789 and MAR24, revealed that they carry the KL106 and KL112 capsular polysaccharide (CPS) biosynthesis gene clusters, respectively, at the chromosomal K locus. The KL106 and KL112 gene clusters are related to the previously described KL11 and KL83 gene clusters, sharing genes for the synthesis of l-rhamnose (l-Rhap) and 6-deoxy-l-talose (l-6dTalp). CPS material isolated from 48-1789 and MAR24 was studied by sugar analysis and Smith degradation along with one- and two-dimensional 1H and 13C NMR spectroscopy. The structures of K106 and K112 oligosaccharide repeats (K units) l-6dTalp-(1→3)-D-GlcpNAc tetrasaccharide fragment share the responsible genes in the respective gene clusters. The K106 and K83 CPSs also have the same linkage between K units. The KL112 cluster includes an additional glycosyltransferase gene, Gtr183, and the K112 unit includes α l-Rhap side chain that is not found in the K106 structure. K112 further differs in the linkage between K units formed by the Wzy polymerase, and a different wzy gene is found in KL112. However, though both KL106 and KL112 share the atr8 acetyltransferase gene with KL83, only K83 is acetylated.
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Acinetobacter baumannii K106 and K112: Two Structurally and Genetically Related 6-Deoxy-l-talose-Containing Capsular Polysaccharides
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Autor/in / Beteiligte Person: | Kasimova, Anastasiya A. ; Arbatsky, Nikolay P. ; Tickner, Jacob ; Kenyon, Johanna J. ; Hall, Ruth M. ; Shneider, Michael M. ; Dzhaparova, Alina A. ; Shashkov, Alexander S. ; Chizhov, Alexander O. ; Popova, Anastasiya V. ; Knirel, Yuriy A. |
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Zeitschrift: | International Journal of Molecular Sciences; Volume 22; Issue 11; Pages: 5641, 2021 |
Veröffentlichung: | Multidisciplinary Digital Publishing Institute, 2021 |
Medientyp: | academicJournal |
DOI: | 10.3390/ijms22115641 |
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