Query: NC_011896:363448 Mycobacterium leprae Br4923, complete genome Lineage: Mycobacterium leprae; Mycobacterium; Mycobacteriaceae; Actinomycetales; Actinobacteria; Bacteria General Information: This strain was isolated from a human skin biopsy in Brazil, and passaged in nude mice and armadillos. The bacterium is a close relative of M. tuberculosis. However, compared to the latter, the genome of M. leprae is smaller due to reductive genome evolution, with many important metabolic activities including siderophore production, part of the oxidative chain, most of the microaerophilic and anaerobic respiratory chains, and numerous catabolic systems and their regulatory circuits eliminated due to extensive recombination events between dispersed repetitive sequences. It is evident that this species has undergone massive genome reduction over time as a result of its parasitic nature, discarding more than half its genes and rendering it the most striking example of genome reduction in a microbial pathogen.
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General Information: Country: USA; Temp: Mesophile; Temp: 28 - 36C; Habitat: Marine, Skin microflora. Strain DSM 20547, the type strain, is a free-living, nonmotile, Gram-positive bacterium, originally isolated from a marine environment in about 1944. It grows as spherical/coccoid and occurs predominantly in tetrads which can be arranged in cubical packets. It is non-encapsulated and does not form endospores, is strictly aerobic and chemoorganotrophic, requires methionine and other amino acids for growth, and grows well in NaCl at concentrations up to 10% (w/v). This organism is a normal commensal of human skin, however has been implicated in pitted keratolysis, pneumonia, and other opportunistic infections.