Import and editing of plant mitochondrial transfer RNAs
The recombinations and mutations that higher plant mitochondrial (mt) DNA has undergone during evolution have led to the inactivation or complete loss of a number of the native transfer RNA (tRNA) genes deriving from the genome of the ancestral endosymbiont. Whereas the mt genome of the bryophyte Marchantia polymorpha still contains almost all these native tRNA genes (Oda et al. 1992a and b), one third to one half of them have disappeared from higher plant mitochondria and the remaining genes cannot provide for the needs of the mt translation system (Ceci et al. 1996, Sangaré et al. 1990, Unseld et al. 1997, Weber-Lotfi et al. 1993).
KeywordsMaize Codon Recombination Electrophoresis Lysine
Unable to display preview. Download preview PDF.
- Kumar R, Marechal-Drouard L, Akama K, Small I (1996) Striking differences in mitochondrial tRNA import among different plant species. Mol. Gen. Genet. 252:Google Scholar
- Maréchal-Drouard L, Cosset A, Remacle C, Ramamonjisoa D, Dietrich A (1996a) A single editing event is a prerequisite for efficient processing of potato mitochondrial phenylalanine tRNA. Mol. Cell. Biol. 16:3504–3510Google Scholar
- Marechal-Drouard L, Kumar R, Remacle C, Small I (1996b) RNA editing of larch mitochondrial tRNAHis precursors is a prerequisite for processing. Nucleic Acids Res. 24: 3229–3234Google Scholar
- Oda K, Yamato K, Ohta E, Nakamura Y, Takemura M, Nozato N, Akashi K, Kanegae T, Ogura Y, Kohchi T, Ohyama K (1992a) Gene organization deduced from the complete sequence of liverwort Marchantía polymorpha mitochondrial DNA - A primitive form of plant mitochondrial genome. J. Mol. Biol. 223: 1–7CrossRefGoogle Scholar
- Schneider A, Martin J, Agabian N (1994) A nuclear-encoded tRNA of Trypanosoma brucei is imported into mitochondria. Mol. Cell. Biol. 14: 2317–2322Google Scholar
- Small I, Marechal-Drouard L, Masson J, Pelletier G, Cosset A, Weil JH, Dietrich A (1992) In vivo import of a normal or mutagenized heterologous transfer RNA into the mitochondria of transgenic plants: Towards novel ways of influencing mitochondrial gene expression ? EMBO J. 11:1291–1296PubMedGoogle Scholar