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  Importance of adenosine-to-inosine editing adjacent to the anticodon in an Arabidopsis alanine tRNA under environmental stress

Zhou, W., Karcher, D., & Bock, R. (2013). Importance of adenosine-to-inosine editing adjacent to the anticodon in an Arabidopsis alanine tRNA under environmental stress. Nucleic Acids Research, 41(5), 3362-3372. doi:10.1093/nar/gkt013.

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Zhou, W.1, Autor           
Karcher, D.1, Autor           
Bock, R.1, Autor           
Affiliations:
1Organelle Biology and Biotechnology, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753326              

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 Zusammenfassung: In all organisms, transfer RNAs (tRNAs) undergo extensive post-transcriptional modifications. Although base modifications in the anticodon are known to alter decoding specificity or improve decoding accuracy, much less is known about the functional relevance of modifications in other positions of tRNAs. Here, we report the identification of an A-to-I tRNA editing enzyme that modifies the tRNA-Ala(AGC) in the model plant Arabidopsis thaliana. The enzyme is homologous to Tad1p, a yeast tRNA-specific adenosine deaminase, and it selectively deaminates the adenosine in the position 3'-adjacent to the anticodon (A(37)) to inosine. We show that the AtTAD1 protein is exclusively localized in the nucleus. The tad1 loss-of-function mutants isolated in Arabidopsis show normal accumulation of the tRNA-Ala(AGC), suggesting that the loss of the I(37) modification does not affect tRNA stability. The tad1 knockout mutants display no discernible phenotype under standard growth conditions, but produce less biomass under environmental stress conditions. Our results provide the first evidence in support of a physiological relevance of the A(37)-to-I modification in eukaryotes.

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Sprache(n): eng - English
 Datum: 2013-01-292013
 Publikationsstatus: Erschienen
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Titel: Nucleic Acids Research
  Andere : Nucleic Acids Res.
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 41 (5) Artikelnummer: - Start- / Endseite: 3362 - 3372 Identifikator: ISSN: 0301-5610
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000262810