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FEBS Lett. 2013 May 2;587(9):1429-33. doi: 10.1016/j.febslet.2013.03.022. Epub 2013 Mar 21.

Arabidopsis chloroplast quantitative editotype.

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Molekulare Genetik, Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany.


Chloroplast C-to-U RNA editing is an essential post-transcriptional process. Here we analyzed RNA editing in Arabidopsis thaliana using strand-specific deep sequencing datasets from the wild-type and a mutant defective in RNA 3' end maturation. We demonstrate that editing at all sites is partial, with an average of 5-6% of RNAs remaining unedited. Furthermore, we identified nine novel sites with a low extent of editing. Of these, three sites are absent from the WT transcriptome because they are removed by 3' end RNA processing, but these regions accumulate, and are edited, in a mutant lacking polynucleotide phosphorylase.

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