title: Cloning, characterization, and inactivation of the gene pbpC, encoding penicillin-binding protein 3 of Staphylococcus aureus.
abstract: The gene pbpC from Staphylococcus aureus was sequenced: it encodes a 691-amino-acid protein with all of the conserved motifs of a class B high-molecular-weight penicillin-binding protein (PBP), including the transpeptidase conserved motifs SXXK, SXN, and KTG. Insertional inactivation of pbpC and introduction of the intact gene in a laboratory mutant missing PBP 3 showed that the pbpC gene encodes the staphylococcal PBP 3. Inactivation of pbpC caused no detectable change in the muropeptide composition of cell wall peptidoglycan and had only minimum, if any, effect on growth rates, but caused a small but significant decrease in rates of autolysis. Cells of abnormal size and shape and disoriented septa were produced when bacteria with inactivated pbpC were grown in the presence of a sub-MIC of methicillin.
authors.affiliation: Laboratory of Microbiology, The Rockefeller University, New York, New York 10021, USA.
authors.forename: M G
authors.initials: MG
authors.lastname: Pinho
authors.forename: H
authors.initials: H
authors.lastname: de Lencastre
authors.forename: A
authors.initials: A
authors.lastname: Tomasz
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins; D015152:Blotting, Northern; D002352:Carrier Proteins; D003001:Cloning, Molecular; D004269:DNA, Bacterial / Q000235:genetics; D018274:Electroporation; D020868:Gene Silencing; D005816:Genetic Complementation Test; D006602:Hexosyltransferases / Q000235:genetics* / Q000378:metabolism*; D008854:Microscopy, Electron; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000235:genetics* / Q000378:metabolism*; D002267:Muramoylpentapeptide Carboxypeptidase; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases / Q000235:genetics* / Q000378:metabolism*; D017422:Sequence Analysis, DNA; D013211:Staphylococcus aureus / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D014158:Transcription, Genetic; D014161:Transduction, Genetic
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D004269:DNA, Bacterial; D009097:Multienzyme Complexes; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D002267:Muramoylpentapeptide Carboxypeptidase