Structural characterization of Bordetella parapertussis lipid A

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Journal titleJournal of Lipid Research
Pages854859; # of pages: 6
SubjectB. parapertussis; endotoxin; lipopolysaccharide; structure; structural; structural characterization; bordetella; parapertussis; lipid; lipid A; lipid-A
AbstractBordetella parapertussis like B. pertussis, is a causal agent of whooping cough but is not a strictly human pathogen. Because its endotoxin, a major structural component of the Gram-negative outer membrane, is an important virulence factor, we have analyzed the structure of its toxic lipid domain, in one rough and two smooth bacterial strains. Chemical analyses and mass spectra obtained before and after recently developed mild-alkali treatments revealed that the lipids A have the common bisphosphorylated β-(1→6)- linked D-glucosamine disaccharide with hydroxytetradecanoic acid in amide linkages. All three strains have two major molecular species: a tetraacyl and a pentaacyl species. The rough strain is richer in a minor hexaacyl species. Acylation at the C-2, C-3, and C-3′ positions was different from that of the B. pertussis lipid A. The C-2 position carries a secondary hexadecanoic acid, the C-3 position is free, and the C-3′ position is substituted with hydroxydecanoic acid (not at C-3 as in B. pertussis), and the rough strain hexaacyl species carries a second secondary hexadecanoic acid. Like the lipid A of B. pertussis, the hydroxytetradecanoic acid at the C-2′ position was substituted by tetradecanoic acid.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Biological Sciences
Peer reviewedYes
NRC numberHAMID2008
NPARC number15336765
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Record identifier3b595b46-7eba-4c5e-9f67-30f254645835
Record created2010-05-21
Record modified2016-05-09
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