Quantitative trait locus mapping identifies REME2, a PPR-DYW protein required for editing of specific C targets in Arabidopsis mitochondria

• Published in: RNA biology 2013, Vol.10 (9), p.1520-1525
• Main Authors: Bentolila, Stéphane, Babina, Arianne M, Germain, Arnaud, Hanson, Maureen R
• Format: Article
• Language: English
• Subjects: Amino Acid Sequence; Arabidopsis - genetics; Arabidopsis - growth & development; Arabidopsis Proteins - genetics; Arabidopsis Proteins - metabolism; DNA, Bacterial; Gene Expression Regulation, Plant; Gene Knockdown Techniques; Mitochondria - genetics; Molecular Sequence Data; plant mitochondria; Plant Proteins - genetics; Plant Proteins - metabolism; Polymorphism, Single Nucleotide; QTL mapping; Quantitative Trait Loci; Regulatory Sequences, Nucleic Acid; Research Paper; Ribosomal Proteins - genetics; Ribosomal Proteins - metabolism; RNA Editing; RNA-Binding Proteins - genetics; RNA-Binding Proteins - metabolism; RPS3; RPS4; Sequence Homology, Amino Acid; virus-induced gene silencing
• ISSN: 1547-6286; 1555-8584; 1555-8584
• DOI: 10.4161/rna.25297

Targeted RNA editing by C-to-U alteration occurs at hundreds of sites in the mitochondrial transcriptome of flowering plants. By using natural variation and positional cloning on a population of Arabidopsis recombinant inbred lines between the ecotypes Col and Ler, we found that two of these occurrences involve the Arabidopsis PPR-DYW protein REME2 (Required for Efficiency of Mitochondrial Editing2). The analysis of a knockdown mutant along with silenced tissues confirms the specificity of REME2 for both sites located in mitochondrial ribosomal protein genes (rps3-1534 and rps4-175). The conservation level of both cis elements is relatively high, as is the amino acid conservation among flowering plants for both genes in that location, underlining the importance of these editing events and REME2.