Query: NC_014328:1596016 Clostridium ljungdahlii ATCC 49587 chromosome, complete genome Lineage: Clostridium ljungdahlii; Clostridium; Clostridiaceae; Clostridiales; Firmicutes; Bacteria General Information: This strain was isolated from chicken yard waste and is studied for its ability to produce ethanol. This acetogenic species has the ability to convert carbon monoxide into ethanol. The yield of this process has been increased substantially in the laboratory by using a dual-fermentation system. A methanogenic conversion step has also been designed for utilizing some of the waste products generated during the synthetic process.
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General Information: This organism is associated with severe and chronic periodontal (tissues surrounding and supporting the tooth) diseases. Progression of the disease is caused by colonization by this organism in an anaerobic environment in host tissues and severe progression results in loss of the tissues supporting the tooth and eventually loss of the tooth itself. The black pigmentation characteristic of this bacterium comes from iron acquisition that does not use the typical siderophore system of other bacteria but accumulates hemin. Peptides appear to be the predominant carbon and energy source of this organism, perhaps in keeping with its ability to destroy host tissue. Oxygen tolerance systems play a part in establishment of the organism in the oral cavity, including a superoxide dismutase. Pathogenic factors include extracellular adhesins that mediate interactions with other bacteria as well as the extracellular matrix, and a host of degradative enzymes that are responsible for tissue degradation and spread of the organism including the gingipains, which are trypsin-like cysteine proteases.