Molecular-genetic evidence for the relationship of Mycobacterium leprae to slow-growing pathogenic mycobacteria
- PMID: 2458422
Molecular-genetic evidence for the relationship of Mycobacterium leprae to slow-growing pathogenic mycobacteria
Abstract
A total of 1170 nucleotides of the 16S rRNA from Mycobacterium leprae were compared to the homologous regions of M. tuberculosis, M. bovis Vallée, M. avium, M. scrofulaceum, M. phlei, M. fortuitum and one representative each of the genera Corynebacterium, Nocardia, and Rhodococcus. Homology values were calculated and a phylogenetic tree was constructed from the evolutionary distance values. Despite differences in DNA G + C content and genome size, M. leprae is a true member of the slow-growing pathogenic mycobacteria, branching off intermediate to the other members of this subgroup. Slow- and fast-growing mycobacteria are phylogenetically well separated but constitute an individual branch of the actinomycetes proper. Significant structural variation of certain regions of the 16S rRNA may allow construction of M. leprae-specific probes used for rapid identification.
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