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- W2021769293 abstract "Several tRNA species have a long variable arm composed of over ten nucleotides, which are relevant to those specific to serine, leucine and tyrosine in prokaryotes, while there are only serine and leucine-specific tRNAs in eukaryotes. To clarify the evolutionary aspects of the identity determination mechanism of these tRNAs, the tRNASer recognition in Saccharomyces cerevisiae was studied. Unmodified tRNALeu transcript had serylation ability of low efficiency, but native tRNALeu did not, indicating that some modification of tRNALeu serves as a negative identity determinant for seryl-tRNA synthetase. Changing the discriminator base did not seriously affect the serine accepting efficiency. The tRNALeu transcript possessing the variable arm of tRNASer was efficiently aminoacylated with serine. Eventually, it was found that only one nucleotide insertion to the variable arm of tRNALeu was sufficient to confer an efficient serine accepting activity. The mode of serine tRNA recognition is similar to that in Escherichia coli in that the end of the long variable arm, but not the anticodon or discriminator base, is important. However,S. cerevisiae seryl-tRNA synthetase adopts a substantially different mechanism for rejection of tRNALeu from that of its E. coli counterpart." @default.
- W2021769293 created "2016-06-24" @default.
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- W2021769293 date "1997-05-01" @default.
- W2021769293 modified "2023-10-14" @default.
- W2021769293 title "Only one nucleotide insertion to the long variable arm confers an efficient serine acceptor activity upon Saccharomyces cerevisiae tRNALeu in vitro" @default.
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- W2021769293 doi "https://doi.org/10.1006/jmbi.1997.0991" @default.
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