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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Nature of the genome of the saprophytic spirochete Spirochaeta aurantia and its ribosomal RNA operons.

Using restriction endonucleases DraI, AseI, and I-CeuI in conjunction with pulsed-field gel electrophoresis, we have shown that Spirochaeta aurantia M1 possesses a circular 3.98-Mb genome. This is the second largest spirochete chromosome yet analyzed. The observation that the latter enzyme cuts in 3 places suggests the presence of 3 copies of the large subunit (23S) rRNA gene (rrl), which was confirmed by Southern hybridizations. The complete sequence of 2 of the ribosomal RNA operons was determined, revealing that their structure resembled that of the typical member of the bacterial superkingdom: rrs (16S; 1561 bp), tRNA, rrl (23S; 2972 bp), and rrf (5S; 110 bp). The S. aurantia rrs-rrl intergenic regions, as with Treponema denticola, contain genes specifying a 73-nt tRNA(Ala) (anticodon TGC) and a 77-nt tRNA(Ile) (anticodon GAT).[1]

References

  1. Nature of the genome of the saprophytic spirochete Spirochaeta aurantia and its ribosomal RNA operons. McLaughlin, R., Secko, D.M., Paul, C.J., Kropinski, A.M. Can. J. Microbiol. (2004) [Pubmed]
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