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Mutations in Putative Mutator Genes of Mycobacterium tuberculosis Strains of the W-Beijing Family

Alterations in genes involved in the repair of DNA mutations (mut genes) result in an increased mutation frequency and better adaptability of the bacterium to stressful conditions. W-Beijing genotype strains displayed unique missense alterations in three putative mut genes, including two of the mutT...

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Detalles Bibliográficos
Autores principales: Rad, Mina Ebrahimi, Bifani, Pablo, Martin, Carlos, Kremer, Kristin, Samper, Sofia, Rauzier, Jean, Kreiswirth, Barry, Blazquez, Jesus, Jouan, Marc, van Soolingen, Dick, Gicquel, Brigitte
Formato: Texto
Lenguaje:English
Publicado: Centers for Disease Control and Prevention 2003
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3023437/
https://www.ncbi.nlm.nih.gov/pubmed/12890325
http://dx.doi.org/10.3201/eid0907.020803
Descripción
Sumario:Alterations in genes involved in the repair of DNA mutations (mut genes) result in an increased mutation frequency and better adaptability of the bacterium to stressful conditions. W-Beijing genotype strains displayed unique missense alterations in three putative mut genes, including two of the mutT type (Rv3908 and mutT2) and ogt. These polymorphisms were found to be characteristic and unique to W-Beijing phylogenetic lineage. Analysis of the mut genes in 55 representative W-Beijing isolates suggests a sequential acquisition of the mutations, elucidating a plausible pathway of the molecular evolution of this clonal family. The acquisition of mut genes may explain in part the ability of the isolates of W-Beijing type to rapidly adapt to their environment.