title: Cloning and expression of methicillin resistance from Staphylococcus epidermidis in Staphylococcus carnosus.
abstract: A 6.2-kilobase chromosomal DNA fragment from a methicillin-resistant Staphylococcus epidermidis strain was cloned into Staphylococcus carnosus by using staphylococcal plasmid pCA44 as the vector. The recombinant plasmid obtained, pBBB21, conferred methicillin resistance on its host and was responsible for the synthesis of a low-affinity penicillin-binding protein (PBP), PBP 2'. PBP 2' determined by the S. epidermidis DNA and expressed as a membrane-bound PBP in S. carnosus reacted with monoclonal antibodies directed against PBP 2' of Staphylococcus aureus origin, and the cloned S. epidermidis DNA hybridized to the methicillin (mec)-specific DNA from S. aureus. These findings point to a common origin of the methicillin resistance determinant in staphylococci.
mesh_terms: D001426:Bacterial Proteins; D002352:Carrier Proteins; D005819:Genetic Markers; D005822:Genetic Vectors; D006602:Hexosyltransferases / Q000096:biosynthesis; D008712:Methicillin / Q000494:pharmacology*; D009097:Multienzyme Complexes / Q000096:biosynthesis; D002267:Muramoylpentapeptide Carboxypeptidase; D010403:Penicillin Resistance / Q000235:genetics; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases / Q000096:biosynthesis; D010957:Plasmids; D012150:Polymorphism, Restriction Fragment Length; D015183:Restriction Mapping; D013210:Staphylococcus / Q000187:drug effects* / Q000235:genetics; D013212:Staphylococcus epidermidis / Q000187:drug effects / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D005819:Genetic Markers; D009097:Multienzyme Complexes; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D002267:Muramoylpentapeptide Carboxypeptidase; D008712:Methicillin