Transcriptome map of plant mitochondria reveals islands of unexpected transcribed regions
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- 作者：Sota Fujii (1) (2)
Takushi Toda (1)
Shunsuke Kikuchi (3)
Ryutaro Suzuki (3)
Koji Yokoyama (3)
Hiroko Tsuchida (3)
Kentaro Yano (3)
Kinya Toriyama (1) - 刊名：BMC Genomics
- 出版年：2011
- 出版时间：December 2011
- 年：2011
- 卷：12
- 期：1
- 全文大小：3110KB
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Takushi Toda (1)
Shunsuke Kikuchi (3)
Ryutaro Suzuki (3)
Koji Yokoyama (3)
Hiroko Tsuchida (3)
Kentaro Yano (3)
Kinya Toriyama (1)
1. Laboratory of Environmental Biotechnology, Graduate School of Agricultural Science, Tohoku University, Sendai, 981-8555, Japan
2. Graduate School of Science, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
3. School of Agriculture, Meiji University, Kawasaki, 214-8571, Japan
文摘
Background Plant mitochondria contain a relatively large amount of genetic information, suggesting that their functional regulation may not be as straightforward as that of metazoans. We used a genomic tiling array to draw a transcriptomic atlas of Oryza sativa japonica (rice) mitochondria, which was predicted to be approximately 490-kb long. Results Whereas statistical analysis verified the transcription of all previously known functional genes such as the ones related to oxidative phosphorylation, a similar extent of RNA expression was frequently observed in the inter-genic regions where none of the previously annotated genes are located. The newly identified open reading frames (ORFs) predicted in these transcribed inter-genic regions were generally not conserved among flowering plant species, suggesting that these ORFs did not play a role in mitochondrial principal functions. We also identified two partial fragments of retrotransposon sequences as being transcribed in rice mitochondria. Conclusion The present study indicated the previously unexpected complexity of plant mitochondrial RNA metabolism. Our transcriptomic data (Oryza sativa Mitochondrial rna Expression Server: OsMES) is publicly accessible at [http://bioinf.mind.meiji.ac.jp/cgi-bin/gbrowse/OsMes/#search].