title: The penicillin-binding proteins of Caulobacter crescentus.
abstract: The proteins that specifically bind penicillin G were studied with Caulobacter crescentus. This organism possessed at least 5 penicillin-binding proteins (PBPs): PBP 1A (132 K), PBP 1Bs (98 K), PBP 2 (77 K), PBP 3 (64 K), and PBP 4 (50 K). As expected from the unique morphology, the C. crescentus PBPs were different from those of other sources in molecular weight and localization: C. crescentus did not possess PBPs of low molecular weight. PBP 4 was found only in the outer membrane, while the other PBPs were present mostly in the inner membrane.
mesh_terms: D001419:Bacteria / Q000032:analysis*; D001426:Bacterial Proteins; D002352:Carrier Proteins / Q000302:isolation & purification*; D002462:Cell Membrane / Q000032:analysis; D004926:Escherichia coli / Q000032:analysis; D006602:Hexosyltransferases; D008565:Membrane Proteins / Q000302:isolation & purification*; D008970:Molecular Weight; D002267:Muramoylpentapeptide Carboxypeptidase; D010400:Penicillin G; D046915:Penicillin-Binding Proteins; D010406:Penicillins / Q000302:isolation & purification*; D010458:Peptidyl Transferases; D013045:Species Specificity
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D008565:Membrane Proteins; D046915:Penicillin-Binding Proteins; D010406:Penicillins; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D002267:Muramoylpentapeptide Carboxypeptidase; D010400:Penicillin G