PMCCPMCCPMCC

Search tips
Search criteria 

Advanced

 
Logo of narLink to Publisher's site
 
Nucleic Acids Res. 1999 February 1; 27(3): 721–729.
PMCID: PMC148239

tRNA recognition and evolution of determinants in seryl-tRNA synthesis.

Abstract

We have analyzed the evolution of recognition of tRNAsSerby 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. tRNALeuand 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 phylo-genetic 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.

Full Text

The Full Text of this article is available as a PDF (227K).

Articles from Nucleic Acids Research are provided here courtesy of Oxford University Press