title: The affinity of imipenem (N-formimidoylthienamycin) for the penicillin-binding proteins of Staphylococcus aureus--binding and release.
abstract: Penicillin-binding proteins 1, 2 and 3 in Staphylococcus aureus were found to possess common properties. All have very strong affinities for both benzylpenicillin and imipenem (N-formimidoylthienamycin), and all have an activity which releases bound imipenem, but not bound benzylpenicillin. Lower molecular weight penicillin-binding protein 4, which has a rather weak affinity for benzylpenicillin and also weak penicillinase activity showed an extraordinarily high affinity for imipenem but no antibiotic-releasing activity.
mesh_terms: D000900:Anti-Bacterial Agents / Q000378:metabolism*; D001426:Bacterial Proteins; D002250:Carbon Radioisotopes; D002268:Carboxypeptidases / Q000378:metabolism*; D002352:Carrier Proteins / Q000378:metabolism*; D006602:Hexosyltransferases; D006358:Hot Temperature; D015378:Imipenem; D002267:Muramoylpentapeptide Carboxypeptidase / Q000378:metabolism*; D010400:Penicillin G / Q000378:metabolism; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D013211:Staphylococcus aureus / Q000378:metabolism*; D013845:Thienamycins / Q000378:metabolism*; D001618:beta-Lactamases / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D002250:Carbon Radioisotopes; D002352:Carrier Proteins; D046915:Penicillin-Binding Proteins; D013845:Thienamycins; D015378:Imipenem; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D002268:Carboxypeptidases; D002267:Muramoylpentapeptide Carboxypeptidase; D001618:beta-Lactamases; D010400:Penicillin G