Bordetella pertussis, Bordetella parapertussis and Bordetella bronchiseptica are closely related Gram-negative Beta-proteobacteria that colonizes the respiratory tracts of mammals. B. pertussis is a strict human pathogen of recent evolutionary origin and is the primary etiologic agent of whooping cough. D-Alanine is a necessary precursor in the biosynthesis of cell wall in this bacterium (Ref.1).
Nat Rev Microbiol. 2014 Apr;12(4):274-88
J Enzyme Inhib Med Chem. 2016 Aug;31(4):517-26.
J Comput Aided Mol Des. 2002 Dec; 16(12):935-53
Nat Genet. 2003 Sep; 35(1):32-40
Biochemistry 2003 May 20; 42(19):5775-83
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