Abstract
The complete amino acid and nucleotide sequence of a secreted metalloprotease produced by Actinobacillus pleuropneumoniae serotype 1 is reported. A clone showing proteolytic activity in cell-free culture media was selected from a genomic library of A. pleuropneumoniae serotype 1 in pUC 19. The sequence obtained contained an open reading frame encoding a protein with 869 amino acids. This protein was identified as a zinc neutral-metalloprotease belonging to the aminopeptidase family, with a predicted molecular weight of approximately 101 kDa. This sequence showed high homology with other predicted or sequenced aminopeptidases reported for different Gram-negative bacteria. Expression of the protease was observed in lung tissue from pigs that died of porcine pleuropneumonia suggesting a role in pathogenesis.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Actinobacillus Infections / microbiology
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Actinobacillus Infections / veterinary
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Actinobacillus pleuropneumoniae / enzymology*
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Actinobacillus pleuropneumoniae / genetics*
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Actinobacillus pleuropneumoniae / pathogenicity
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Amino Acid Motifs
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Amino Acid Sequence
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Animals
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Cloning, Molecular
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DNA, Bacterial / chemistry
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DNA, Bacterial / isolation & purification
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Escherichia coli / genetics
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Escherichia coli / metabolism
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Gene Expression
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Genes, Bacterial
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Lung / pathology
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Metalloproteases / chemistry
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Metalloproteases / genetics*
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Metalloproteases / immunology
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Metalloproteases / metabolism*
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Microscopy, Fluorescence
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Molecular Sequence Data
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Molecular Weight
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Open Reading Frames
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Pleuropneumonia / microbiology
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Pleuropneumonia / veterinary
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Recombinant Proteins / metabolism
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Sequence Homology
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Swine / microbiology
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Swine Diseases / microbiology
Substances
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DNA, Bacterial
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Recombinant Proteins
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Metalloproteases