title: Characterization by molecular cloning and sequencing of the gene encoding an aminopeptidase from Listeria monocytogenes.
abstract: The pepC gene of Listeria monocytogenes encodes aminopeptidase C that is predicted to share 72% amino acid sequence similarity and 53% sequence identity with the cysteine aminopeptidase PepC from Lactococcus lactis. The gene product also shows strong similarity to aminopeptidase C from Streptococcus thermophilus and Lactobacillus helveticus, and to a cysteine proteinase/bleomycin hydrolase from Saccharomyces cerevisiae. The enzyme from L. monocytogenes displayed broad N-terminal hydrolytic activity, with a similar substrate specificity to its lactic acid bacterial counterpart. The inhibition spectrum shows a great deal of similarity with enzymes from the family of lactic acid bacteria. In addition, one of the clones studied contained DNA sequences that could encode a regulatory protein of the deoR helix-turn-helix DNA binding protein family. The organization of the locus, designated pep, is presented along with the characterization of the gene products of the pep locus.
authors.affiliation: University, of Arkansas, Department of Food Science, Fayetteville 72701, USA.
authors.forename: D K
authors.initials: DK
authors.lastname: Winters
authors.forename: D M
authors.initials: DM
authors.lastname: Ivey
authors.forename: T P
authors.initials: TP
authors.lastname: Maloney
authors.forename: M G
authors.initials: MG
authors.lastname: Johnson
mesh_terms: D000595:Amino Acid Sequence; D000626:Aminopeptidases / Q000235:genetics* / Q000302:isolation & purification; D000911:Antibodies, Monoclonal; D001426:Bacterial Proteins; D001483:Base Sequence; D003001:Cloning, Molecular; D004269:DNA, Bacterial / Q000032:analysis; D004268:DNA-Binding Proteins; D005798:Genes, Bacterial; D019077:Helix-Turn-Helix Motifs; D015151:Immunoblotting; D008089:Listeria monocytogenes / Q000201:enzymology / Q000235:genetics*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012045:Regulatory Sequences, Nucleic Acid; D012097:Repressor Proteins / Q000235:genetics; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D000911:Antibodies, Monoclonal; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; D012097:Repressor Proteins; D000626:Aminopeptidases; C086319:PepC thiol aminopeptidase; C427186:pepR protein, Listeria monocytogenes