Genome sequence alterations detected upon passage of Burkholderia mallei ATCC 23344 in culture and in mammalian hostsReportar como inadecuado




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BMC Genomics

, 7:228

First Online: 05 September 2006Received: 17 April 2006Accepted: 05 September 2006

Abstract

BackgroundMore than 12,000 simple sequence repeats SSRs have been identified in the genome of Burkholderia mallei ATCC 23344. As a demonstrated mechanism of phase variation in other pathogenic bacteria, these may function as mutable loci leading to altered protein expression or structure variation. To determine if such alterations are occurring in vivo, the genomes of various single-colony passaged B. mallei ATCC 23344 isolates, one from each source, were sequenced from culture, a mouse, a horse, and two isolates from a single human patient, and the sequence compared to the published B. mallei ATCC 23344 genome sequence.

ResultsForty-nine insertions and deletions indels were detected at SSRs in the five passaged strains, a majority of which 67.3% were located within noncoding areas, suggesting that such regions are more tolerant of sequence alterations. Expression profiling of the two human passaged isolates compared to the strain before passage revealed alterations in the mRNA levels of multiple genes when grown in culture.

ConclusionThese data support the notion that genome variability upon passage is a feature of B. mallei ATCC23344, and that within a host B. mallei generates a diverse population of clones that accumulate genome sequence variation at SSR and other loci.

AbbreviationsSSRSimple Sequence Repeat

indelInsertion or Deletion

SNPSingle-Nucleotide Polymorphism

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Fuente: https://link.springer.com/article/10.1186/1471-2164-7-228



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