Abstract
The moss Physcomitrella patens has two RNA editing sites in the chloroplasts. Here we identified a novel DYW-subclass pentatricopeptide repeat (PPR) protein, PpPPR_45, as a chloroplast RNA editing factor in P. patens. Knockdown of the PpPPR_45 gene reduced the extent of RNA editing at the chloroplast rps14-C2 site, whereas over-expression of PpPPR_45 increased the levels of RNA editing at both the rps14-C2 site and its neighboring C site. This indicates that the expression level of PpPPR_45 affects the extent of RNA editing at the two neighboring sites.
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