Pre_GI: SWBIT SVG BLASTN

Query: NC_015275:3594890 Clostridium lentocellum DSM 5427 chromosome, complete genome

Lineage: Cellulosilyticum lentocellum; Cellulosilyticum; Lachnospiraceae; Clostridiales; Firmicutes; Bacteria

General Information: Isolation: River sediment with paper mill waste; Temp: Mesophile; Temp: 40C; Isolation:river sediment with paper mill waste; Country:United Kingdom: River Don, Scotland. This genus comprises about 150 metabolically diverse species of anaerobes that are ubiquitous in virtually all anoxic habitats where organic compounds are present, including soils, aquatic sediments and the intestinal tracts of animals and humans. This shape is attributed to the presence of endospores that develop under conditions unfavorable for vegetative growth and distend single cells terminally or sub-terminally. Spores germinate under conditions favorable for vegetative growth, such as anaerobiosis and presence of organic substrates. It is believed that present day Mollicutes (Eubacteria) have evolved regressively (i.e., by genome reduction) from gram-positive clostridia-like ancestors with a low GC content in DNA. This is a cellulolytic bacterium isolated from river sediment containing paper-mill waste.

Subject: NC_011896:2571232 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.