例如:"lncRNA", "apoptosis", "WRKY"

Valyl-tRNA synthetase gene of Escherichia coli K12. Primary structure and homology within a family of aminoacyl-TRNA synthetases.

J Biol Chem. 1988 Jan 15;263(2):868-77
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摘要


The DNA nucleotide sequence of the valS gene encoding valyl-tRNA synthetase of Escherichia coli has been determined. The deduced primary structure of valyl-tRNA synthetase was compared to the primary sequences of the known aminoacyl-tRNA synthetases of yeast and bacteria. Significant homology was detected between valyl-tRNA synthetase of E. coli and other known branched-chain aminoacyl-tRNA synthetases. In pairwise comparisons the highest level of homology was detected between the homologous valyl-tRNA synthetases of yeast and E. coli, with an observed 41% direct identity overall. Comparisons between the valyl- and isoleucyl-tRNA synthetases of E. coli yielded the highest level of homology detected between heterologous enzymes (19.2% direct identity overall). An alignment is presented between the three branched-chain aminoacyl-tRNA synthetases (valyl- and isoleucyl-tRNA synthetases of E. coli and yeast mitochondrial leucyl-tRNA synthetase) illustrating the close relatedness of these enzymes. These results give credence to the supposition that the branched-chain aminoacyl-tRNA synthetases along with methionyl-tRNA synthetase form a family of genes within the aminoacyl-tRNA synthetases that evolved from a common ancestral progenitor gene.

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原始数据


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