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Type: Journal article
Title: Plastid Sequences Contribute to Some Plant Mitochondrial Genes
Author: Wang, D.
Rousseau, M.
Timmis, J.
Citation: Molecular Biology and Evolution, 2012; 29(7):1707-1711
Publisher: Oxford Univ Press
Issue Date: 2012
ISSN: 0737-4038
Statement of
Dong Wang, Mathieu Rousseau-Gueutin and Jeremy N. Timmis
Abstract: DNA of plastid (chloroplast) origin comprises between 1% and 10% of the mitochondrial genomes of higher plants, but functions are currently considered to be limited to rare instances where plastid tRNA genes have replaced their mitochondrial counterparts, where short patches of mitochondrial genes evolved using their homologous plastidic copies by gene conversion or where a new promoter region is created. Here, we show that, in some angiosperms, plastid-derived DNA in mitochondrial genomes (also called mtpt for mitochondrial plastid DNA) contributes codons to unrelated mitochondrial protein-coding sequences and may also have a role in posttranscriptional RNA processing. We determined that these transfers of plastid DNA occurred a few to 150 Ma and that mtpts can sometimes remain dormant many millions of years before contributing to the mitochondrial proteome.
Keywords: chloroplast; DNA transfer; mitochondrion; mtpts.
Rights: © The Author 2012
RMID: 0020120255
DOI: 10.1093/molbev/mss016
Appears in Collections:Genetics publications

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