title: Cloning and characterization of the gene encoding penicillin-binding protein A of Streptomyces griseus.
abstract: An internal segment of the penicillin-binding protein gene, pbpA, of Streptomyces griseus was amplified from genomic DNA using the polymerase chain reaction and used as a hybridization probe to isolate the complete gene from a cosmid library. pbpA encodes a 485 amino acid sequence that conserves three motifs of PBPs, SXXK, SXN, and KTG. The pbpA gene was located downstream of a gene homologous to the Bacillus subtilis spoVE gene. The pbpA gene was disrupted by replacing an ApaI fragment of the pbpA gene in S. griseus chromosome with an apramycin resistance gene cassette or directly inserting this apramycin resistance gene cassette at the NcoI site of pbpA penicillin-binding domain. No obvious defects in growth, sporulation, or spore sonication resistance were observed in the constructed pbpA mutants, suggesting that PBPA is not essential for growth and sporulation under normal laboratory conditions in S. griseus.
authors.affiliation: Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA. hijang@pharmacy.wisc.edu
authors.forename: H
authors.initials: H
authors.lastname: Jiang
authors.forename: K E
authors.initials: KE
authors.lastname: Kendrick
mesh_terms: D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D001426:Bacterial Proteins; D001483:Base Sequence; D015139:Blotting, Southern; D002352:Carrier Proteins / Q000737:chemistry / Q000235:genetics* / Q000502:physiology; D003001:Cloning, Molecular; D005798:Genes, Bacterial; D006602:Hexosyltransferases; D008969:Molecular Sequence Data; D002267:Muramoylpentapeptide Carboxypeptidase / Q000737:chemistry / Q000235:genetics* / Q000502:physiology; D016254:Mutagenesis, Insertional; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D010641:Phenotype; D016133:Polymerase Chain Reaction; D013171:Spores, Bacterial / Q000502:physiology; D013305:Streptomyces griseus / Q000737:chemistry / Q000235:genetics* / Q000502:physiology
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D002267:Muramoylpentapeptide Carboxypeptidase