Role of the horizontal gene exchange in evolution of pathogenic Mycobacteria

Show simple item record Reva, Oleg N. Korotetskiy, I. Ilin, A. 2015-09-18T06:18:44Z 2015-09-18T06:18:44Z 2015-02
dc.description.abstract BACKGROUND : Mycobacterium tuberculosis is one of the most dangerous human pathogens, the causative agent of tuberculosis. While this pathogen is considered as extremely clonal and resistant to horizontal gene exchange, there are many facts supporting the hypothesis that on the early stages of evolution the development of pathogenicity of ancestral Mtb has started with a horizontal acquisition of virulence factors. Episodes of infections caused by non-tuberculosis Mycobacteria reported worldwide may suggest a potential for new pathogens to appear. If so, what is the role of horizontal gene transfer in this process? RESULTS : Availing of accessibility of complete genomes sequences of multiple pathogenic, conditionally pathogenic and saprophytic Mycobacteria, a genome comparative study was performed to investigate the distribution of genomic islands among bacteria and identify ontological links between these mobile elements. It was shown that the ancient genomic islands from M. tuberculosis still may be rooted to the pool of mobile genetic vectors distributed among Mycobacteria. A frequent exchange of genes was observed between M. marinum and several saprophytic and conditionally pathogenic species. Among them M. avium was the most promiscuous species acquiring genetic materials from diverse origins. CONCLUSIONS : Recent activation of genetic vectors circulating among Mycobacteria potentially may lead to emergence of new pathogens from environmental and conditionally pathogenic Mycobacteria. The species which require monitoring are M. marinum and M. avium as they eagerly acquire genes from different sources and may become donors of virulence gene cassettes to other micro-organisms. en_ZA
dc.description.librarian hb2015 en_ZA
dc.description.sponsorship The program “Study on the reversion of antibiotic resistance in pathogenic microorganisms” funded in Kazakhstan (#0113PК00831). Programming and bioinformatics research was funded by the National Research Foundation of South Africa (#86941). en_ZA
dc.description.uri en_ZA
dc.identifier.citation Reva, ON, Korotetskiy, I & Ilin, A. 2015, 'Role of the horizontal gene exchange in evolution of pathogenic Mycobacteria', BMC Evolutionary Biology, vol. 15, suppl. 1, S2, pp. 1-8. en_ZA
dc.identifier.issn 1471-2148
dc.identifier.other 10.1186/1471-2148-15-S1-S2
dc.language.iso en en_ZA
dc.publisher BioMed Central en_ZA
dc.rights © 2015 Reva et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.orglicenses/by/4.0). en_ZA
dc.subject Mycobacterium tuberculosis en_ZA
dc.subject Horizontal gene en_ZA
dc.subject Most dangerous en_ZA
dc.subject Human pathogens en_ZA
dc.subject Multiple pathogenic en_ZA
dc.title Role of the horizontal gene exchange in evolution of pathogenic Mycobacteria en_ZA
dc.type Article en_ZA

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