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Bordetella holmesii Lipopolysaccharide Hide and Seek Game with Pertussis: Structural Analysis of the O-Specific Polysaccharide and the Core Oligosaccharide of the Type Strain ATCC 51541

Hirszfeld Institute of Immunology and Experimental Therapy, 53-114 Wroclaw, Poland
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Int. J. Mol. Sci. 2020, 21(17), 6433; https://doi.org/10.3390/ijms21176433
Received: 12 August 2020 / Revised: 26 August 2020 / Accepted: 28 August 2020 / Published: 3 September 2020
Whooping cough is a highly contagious disease caused predominantly by Bordetella pertussis, but it also comprises of a pertussis-like illness caused by B. holmesii. The virulence factors of B. holmesii and their role in the pathogenesis remain unknown. Lipopolysaccharide is the main surface antigen of all Bordetellae. Data on the structural features of the lipopolysaccharide (LPS) of B. holmesii are scarce. The poly- and oligosaccharide components released by mild acidic hydrolysis of the LPS were separated and investigated by 1H and 13C NMR spectroscopy, mass spectrometry, and chemical methods. The structures of the O-specific polysaccharide and the core oligosaccharide of B. holmesii ATCC 51541 have been identified for the first time. The novel pentasaccharide repeating unit of the B. holmesii O-specific polysaccharide has the following structure: {→2)-α-l-Rhap-(1→6)-α-d-Glcp-(1→4)-[β-d-GlcpNAc-(1→3]-α-d-Galp-(1→3)-α-d-GlcpNAc-(1→}n. The SDS-PAGE and serological cross-reactivities of the B. holmesii LPS suggested the similarity between the core oligosaccharides of B. holmesii ATCC 51541 and B. pertussis strain 606. The main oligosaccharide fraction contained a nonasaccharide. The comparative analysis of the NMR spectra of B. holmesii core oligosaccharide fraction with this of the B. pertussis strain 606 indicated that the investigated core oligosaccharides were identical. View Full-Text
Keywords: whooping cough; pertussis; Bordetella holmesii; Bordetella pertussis; lipopolysaccharide; O-antigen; core; NMR spectroscopy whooping cough; pertussis; Bordetella holmesii; Bordetella pertussis; lipopolysaccharide; O-antigen; core; NMR spectroscopy
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Ucieklak, K.; Koj, S.; Niedziela, T. Bordetella holmesii Lipopolysaccharide Hide and Seek Game with Pertussis: Structural Analysis of the O-Specific Polysaccharide and the Core Oligosaccharide of the Type Strain ATCC 51541. Int. J. Mol. Sci. 2020, 21, 6433.

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