alexa The evolution of mycobacterial pathogenicity: clues from comparative genomics.
Microbiology

Microbiology

Journal of Medical Microbiology & Diagnosis

Author(s): Brosch R, Pym AS, Gordon SV, Cole ST

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Abstract Comparative genomics, and related technologies, are helping to unravel the molecular basis of the pathogenesis, host range, evolution and phenotypic differences of the slow-growing mycobacteria. In the highly conserved Mycobacterium tuberculosis complex, where single-nucleotide polymorphisms are rare, insertion and deletion events (InDels) are the principal source of genome plasticity. InDels result from recombinational or insertion sequence (IS)-mediated events, expansion of repetitive DNA sequences, or replication errors based on repetitive motifs that remove blocks of genes or contract coding sequences. Comparative genomic analyses also suggest that loss of genes is part of the ongoing evolution of the slow-growing mycobacterial pathogens and might also explain how the vaccine strain BCG became attenuated.
This article was published in Trends Microbiol and referenced in Journal of Medical Microbiology & Diagnosis

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