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Cys-tRNACys formation and cysteine biosynthesis in methanogenic archaea: two faces of the same problem?

Aminoacyl-tRNA (transfer RNA) synthetases are essential components of the cellular translation machinery as they provide the ribosome with aminoacyl-tRNAs. Aminoacyl-tRNA synthesis is generally well understood. However, the mechanism of Cys-tRNACys formation in three methanogenic archaea ( Methanocaldococcus jannaschii, Methanothermobacter thermautotrophicus and Methanopyrus kandleri) is still unknown, since no recognizable gene for a canonical cysteinyl-tRNA synthetase could be identified in the genome sequences of these organisms. Here we review the different routes recently proposed for Cys-tRNACys formation and discuss its possible link with cysteine biosynthesis in these methanogenic archaea.[1]

References

  1. Cys-tRNACys formation and cysteine biosynthesis in methanogenic archaea: two faces of the same problem? Ambrogelly, A., Kamtekar, S., Sauerwald, A., Ruan, B., Tumbula-Hansen, D., Kennedy, D., Ahel, I., Söll, D. Cell. Mol. Life Sci. (2004) [Pubmed]
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