RNA metabolism in plant mitochondria.
Mitochondria are essential for the eukaryotic cell and are derived from the endosymbiosis of an α-proteobacterial ancestor. Compared to other eukaryotes, RNA metabolism in plant mitochondria is complex and combines bacterial-like traits with novel features that evolved in the host cell. These complex RNA processes are regulated by families of nucleus-encoded RNA-binding proteins. Transcription is particularly relaxed and is initiated from multiple promoters covering the entire genome. The variety of RNA precursors accumulating in mitochondria highlights the importance of post-transcriptional processes to determine the size and abundance of transcripts. Here we review RNA metabolism in plant mitochondria, from RNA transcription to translation, with a special focus on their unique features that are controlled by trans-factors.
Centre National de la Recherche Scientifique (CNRS), Institut de Biologie Moléculaire des Plantes, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg, France. Electronic address: kamel.hammani@ibmp-cnrs.unistra.fr.
Kamel
K
Hammani
Centre National de la Recherche Scientifique (CNRS), Institut de Biologie Moléculaire des Plantes, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg, France.
Philippe
P
Giegé
D008928:Mitochondria / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D014176:Protein Biosynthesis; D012313:RNA / Q000378:metabolism; D000077278:RNA, Mitochondrial; D018749:RNA, Plant / Q000378:metabolism*; D014158:Transcription, Genetic
D000077278:RNA, Mitochondrial; D018749:RNA, Plant; D012313:RNA
RNA-binding proteins; gene expression; organelle; post-transcriptional steps; regulatory factors