NDLI: Dual targeting is the rule for organellar aminoacyl-tRNA synthetases in Arabidopsis thaliana

Content Provider	PubMed Central
Author	Duchêne, Anne-marie Anatoli, Giritch Hoffmann, Beate Cognat, Valérie Dominique, Lancelin Peeters, Nemo M. Zaepfel, Marlyse Laurence, Maréchal-drouard Small, Ian D.
Copyright Year	2005
Abstract	In plants, protein synthesis occurs in the cytosol, mitochondria, and plastids. Each compartment requires a full set of tRNAs and aminoacyl-tRNA synthetases. We have undertaken a systematic analysis of the targeting of organellar aminoacyl-tRNA synthetases in the model plant Arabidopsis thaliana. Dual targeting appeared to be a general rule. Among the 24 identified organellar aminoacyl-tRNA synthetases (aaRSs), 15 (and probably 17) are shared between mitochondria and plastids, and 5 are shared between cytosol and mitochondria (one of these aaRSs being present also in chloroplasts). Only two were shown to be uniquely chloroplastic and none to be uniquely mitochondrial. Moreover, there are no examples where the three aaRS genes originating from the three ancestral genomes still coexist. These results indicate that extensive exchange of aaRSs has occurred during evolution and that many are now shared between two or even three compartments. The findings have important implications for studies of the translation machinery in plants and on protein targeting and gene transfer in general.
Related Links	http://dx.doi.org/10.1073/pnas.0504682102
Ending Page	16489
Page Count	6
Starting Page	16484
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	45
Volume Number	102
Language	English
Publisher	National Academy of Sciences
Publisher Date	2005-11-08
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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