Transfer RNA modifications and genes for modifying enzymes in Arabidopsis thaliana

BMC Plant Biology
Peng ChenBo Zheng


In all domains of life, transfer RNA (tRNA) molecules contain modified nucleosides. Modifications to tRNAs affect their coding capacity and influence codon-anticodon interactions. Nucleoside modification deficiencies have a diverse range of effects, from decreased virulence in bacteria, neural system disease in human, and gene expression and stress response changes in plants. The purpose of this study was to identify genes involved in tRNA modification in the model plant Arabidopsis thaliana, to understand the function of nucleoside modifications in plant growth and development. In this study, we established a method for analyzing modified nucleosides in tRNAs from the model plant species, Arabidopsis thaliana and hybrid aspen (Populus tremula × tremuloides). 21 modified nucleosides in tRNAs were identified in both species. To identify the genes responsible for the plant tRNA modifications, we performed global analysis of the Arabidopsis genome for candidate genes. Based on the conserved domains of homologs in Sacccharomyces cerevisiae and Escherichia coli, more than 90 genes were predicted to encode tRNA modifying enzymes in the Arabidopsis genome. Transcript accumulation patterns for the genes in Arabidopsis and the phylogene...Continue Reading


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