title: Nucleotide sequence of a new class A beta-lactamase gene from the chromosome of Yersinia enterocolitica: implications for the evolution of class A beta-lactamases.
abstract: The nucleotide sequence has been determined of a 1400 bp fragment from the chromosome of Yersinia enterocolitica containing the gene for beta-lactamase I. An ORF of 882 bp was identified, which could code for a polypeptide of 294 amino acids, closely related to other beta-lactamases of molecular class A. Amino acids 1-30 could constitute a signal peptide. The mature protein would be 264 amino acids long with a calculated pI of 6.2. Alignment of the amino acid sequence of the class A beta-lactamases suggested the existence of two subgroups in the same class, and this is discussed in the context of the evolution of the enzymes.
authors.affiliation: Departamento de Biología Molecular, F. de Medicina, Universidad de Cantabria, Santander, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Seoane
authors.forename: J M
authors.initials: JM
authors.lastname: García Lobo
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D005075:Biological Evolution; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D016366:Open Reading Frames / Q000235:genetics; D010957:Plasmids; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid; D015008:Yersinia enterocolitica / Q000235:genetics*; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D001618:beta-Lactamases