Analysis of pMA67, a predicted rolling-circle replicating, mobilizable, tetracycline-resistance plasmid from the honey bee pathogen, Paenibacillus larvae
| Autor: | Jesse H. de León, K Daniel Murray, Katherine A. Aronstein |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
DNA Replication
DNA Bacterial Molecular Sequence Data Bacillus Microbiology Paenibacillus chemistry.chemical_compound Plasmid Sequence Homology Nucleic Acid Animals Replicon Promoter Regions Genetic Molecular Biology Gene Peptide sequence Conserved Sequence Phylogeny T-DNA Binary system Genetics Base Sequence biology Tetracycline Resistance Bees biology.organism_classification chemistry Genes Bacterial Rolling circle replication Larva DNA Circular DNA Plasmids |
| Zdroj: | Plasmid. 58:89-100 |
| ISSN: | 0147-619X |
| Popis: | This work characterizes a recently discovered natural tetracycline-resistance plasmid called pMA67 from Paenibacillus larvae--a Gram-positive bacterial pathogen of honey bees. We provide evidence that pMA67 replicates by the rolling-circle mechanism, and sequence comparisons place it in the pMV158 family of rolling-circle replicons. The plasmid contains predicted rep, cop, and rnaII genes for control of replication initiating at a predicted double-strand origin. The plasmid has an ssoT single-strand origin, which is efficient enough to allow only very small amounts of the single-stranded DNA intermediate to accumulate. The overall efficiency of replication is sufficient to render the plasmid segregationally stable without selection in P. larvae and in Bacillus megaterium, but not in Escherichia coli. The plasmid is expected to be mobilizable due to the presence of a mob gene and an oriT site. The plasmid contains a tetL gene, whose predicted amino acid sequence implies a relatively ancient divergence from all previously known plasmid-encoded tetL genes. We confirm that the tetL gene alone is sufficient for conferring resistance to tetracyclines. Sequence comparisons, mostly with the well-characterized pMV158, allow us to predict promoters, DNA and RNA secondary structures, DNA and protein motifs, and other elements. |
| Databáze: | OpenAIRE |
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