tRNA recognition and evolution of determinants in seryl-tRNA synthesis

We have analyzed the evolution of recognition of tRNAsSer by seryl-tRNA synthetases, and compared it to other type 2 tRNAs, which contain a long extra arm. In Eubacteria and chloroplasts this type of tRNA is restricted to three families: tRNALeu, tRNASer and tRNATyr. tRNALeu and tRNASer also carry a...

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Bibliographic Details
Published in:Nucleic acids research 1999-02, Vol.27 (3), p.721-729
Main Authors: Lenhard, Boris, Orellana, Omar, Ibba, Michael, Weygand-Durasevic, Ivana
Format: Article
Language:English
Subjects:
Acylation
Animals
Archaea
Escherichia coli
Eubacteria
Evolution, Molecular
Phylogeny
Protein Biosynthesis
RNA, Transfer, Amino Acid-Specific - metabolism
RNA, Transfer, Amino Acyl - biosynthesis
Serine-tRNA Ligase - metabolism
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Summary:We have analyzed the evolution of recognition of tRNAsSer by seryl-tRNA synthetases, and compared it to other type 2 tRNAs, which contain a long extra arm. In Eubacteria and chloroplasts this type of tRNA is restricted to three families: tRNALeu, tRNASer and tRNATyr. tRNALeu and tRNASer also carry a long extra arm in Archaea, Eukarya and all organelles with the exception of animal mitochondria. In contrast, the long extra arm of tRNATyr is far less conserved: it was drastically shortened after the separation of Archaea and Eukarya from Eubacteria, and it is also truncated in animal mitochondria. The high degree of phylogenetic divergence in the length of tRNA variable arms, which are recognized by both class I and class II aminoacyl-tRNA synthetases, makes type 2 tRNA recognition an ideal system with which to study how tRNA discrimination may have evolved in tandem with the evolution of other components of the translation machinery.
ISSN:0305-1048
1362-4962
DOI:10.1093/nar/27.3.721