Comparative analyses of two cryptic plasmids from Haemophilus somnus ( Histophilus somni)

Haemophilus somnus is an opportunistic bacterial pathogen capable of causing pneumonia, septicemia, and other systemic infections in bovines. An H. somnus isolate from bovine abortion (strain 649) was found to carry a ∼1.3 kb plasmid (pHS649) that contained partial homology to two previously sequenc...

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Veröffentlicht in:Plasmid 2006-05, Vol.55 (3), p.227-234
Hauptverfasser: Siddaramappa, Shivakumara, Duncan, Alison J., Brettin, Thomas, Inzana, Thomas J.
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container_end_page 234
container_issue 3
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container_title Plasmid
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creator Siddaramappa, Shivakumara
Duncan, Alison J.
Brettin, Thomas
Inzana, Thomas J.
description Haemophilus somnus is an opportunistic bacterial pathogen capable of causing pneumonia, septicemia, and other systemic infections in bovines. An H. somnus isolate from bovine abortion (strain 649) was found to carry a ∼1.3 kb plasmid (pHS649) that contained partial homology to two previously sequenced Haemophilus/ Histophilus plasmids by BLAST analyses. Sequence analysis of pHS649 identified a putative RepA protein with 48% similarity to the RepA protein of Escherichia coli plasmid pKL1. A ∼5 kb plasmid (pHS129) from H. somnus preputial isolate 129Pt was also sequenced and found to encode two copies of a putative RepB protein. Whereas pHS649 stably replicated in E. coli DH5α, pHS129 did not. Genetic relatedness and possible replication mechanisms of these plasmids are described.
doi_str_mv 10.1016/j.plasmid.2005.11.004
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subjects Amino Acid Sequence
Animals
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Base Sequence
Cattle
DNA Replication
DNA, Bacterial - genetics
Escherichia coli
Female
Genome
Haemophilus
Haemophilus Infections - microbiology
Haemophilus Infections - veterinary
Haemophilus somnus
Haemophilus somnus - isolation & purification
Histophilus
Molecular Sequence Data
Plasmids
Plasmids - genetics
Pregnancy
RepA
RepB
Sequence Homology, Amino Acid
Sequence Homology, Nucleic Acid
title Comparative analyses of two cryptic plasmids from Haemophilus somnus ( Histophilus somni)
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