Selenomonas ruminantium subsp. lactilytica, a strictly anaerobic ruminal bacterium, possesses typical Gram-negative cell surface structure comprising cytoplasmic membrane, peptidoglycan layer and outer membrane, whereas its 16S rRNA-based taxonomy shows that the bacteria belongs to Gram-positive Firmicutes. Complete genome analysis showed that genes or gene clusters involved in Gram-negative cell structure were scattered in the S. ruminantium genome, and might provide the new insight of phylogenetic relationship between the bacterium and other bacterial species.
Keywords: Negativicutes; Selenomonas ruminantium; complete genome sequence.
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