title: An amino acid substitution that blocks the deacylation step in the enzyme mechanism of penicillin-binding protein 5 of Escherichia coli.
abstract: A mutant of Escherichia coli has been described that produces an altered form of penicillin-binding protein 5 which still binds penicillin but is unable to catalyse the release of the bound penicilloyl moiety. We show that the mutation is caused by a single nucleotide transition that results in a change from glycine at residue 105 of the wild-type sequence of penicillin-binding protein 5 to aspartate in the mutant.
mesh_terms: D000215:Acylation; D000595:Amino Acid Sequence; D001426:Bacterial Proteins; D001483:Base Sequence; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial / Q000235:genetics; D004926:Escherichia coli / Q000201:enzymology* / Q000235:genetics; D006602:Hexosyltransferases; D002267:Muramoylpentapeptide Carboxypeptidase; D009154:Mutation; D010400:Penicillin G / Q000378:metabolism; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D013329:Structure-Activity Relationship
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D004269:DNA, Bacterial; D046915:Penicillin-Binding Proteins; D010458:Peptidyl Transferases; D006602:Hexosyltransferases; D004262:DNA Restriction Enzymes; D002267:Muramoylpentapeptide Carboxypeptidase; D010400:Penicillin G