title: Effect of a beta-lactamase inhibitor, tazobactam, on growth and penicillin-binding proteins of Borrelia burgdorferi.
abstract: The effects of tazobactam, a relatively new beta-lactamase inhibitor, were investigated on growth and penicillin-binding proteins (PBPs) of Borrellia burgdorferi. A previous communication from our group demonstrated several proteins capable of binding labelled penicillin in this organism. Of these proteins, 94-kDa and 57-kDa PBPs possessed the highest affinity for penicillin and were assumed to be essential proteins involved in cell-wall synthesis. In these experiments, tazobactam was used in competition binding experiments as well as on whole spirochetes. Only the 94-kDa and 57-kDa PBPs were affected by increasing amounts of tazobactam during competition-binding experiments and growth of B. burgdorferi was also inhibited. These results may explain the in vitro activity of beta-lactamase inhibitors in general and suggest a utility for these compounds when examining PBPs with hydrolysing activity and/or organisms with beta-lactamases.
authors.affiliation: Department of Medicine, Booth Memorial Medical Center, Flushing, NY 11355.
authors.forename: C
authors.initials: C
authors.lastname: Urban
authors.forename: J J
authors.initials: JJ
authors.lastname: Rahal
authors.forename: B
authors.initials: B
authors.lastname: Luft
mesh_terms: D001426:Bacterial Proteins; D015748:Borrelia burgdorferi Group / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D002352:Carrier Proteins / Q000737:chemistry / Q000378:metabolism; D002455:Cell Division / Q000187:drug effects; D006602:Hexosyltransferases; D008970:Molecular Weight; D002267:Muramoylpentapeptide Carboxypeptidase / Q000737:chemistry / Q000378:metabolism; D010397:Penicillanic Acid / Q000494:pharmacology*; D046915:Penicillin-Binding Proteins; D010406:Penicillins / Q000378:metabolism; D010458:Peptidyl Transferases; D000078142:Tazobactam; D065093:beta-Lactamase Inhibitors
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D046915:Penicillin-Binding Proteins; D010406:Penicillins; D065093:beta-Lactamase Inhibitors; D010397:Penicillanic Acid; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D002267:Muramoylpentapeptide Carboxypeptidase; D000078142:Tazobactam