The chloroplast genome of Pellia endiviifolia: gene content, RNA-editing pattern, and the origin of chloroplast editing.

The chloroplast genome of Pellia endiviifolia: gene content, RNA-editing pattern, and the origin of chloroplast editing.
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DOI:
10.1093/gbe/evs114
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发表时间:
2012
影响因子:
3.3
通讯作者:
Zauner S
Zauner S
中科院分区:
生物学2区
文献类型:
--
作者:
Grosche C;Funk HT;Maier UG;Zauner S

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RNA编辑是一种转录后过程,可以作用于来自线粒体、核和叶绿体基因组的转录物。在叶绿体中,通过RNA编辑的mRNA中的单核苷酸转换在整个植物王国中以不同的频率发生。这些范围从一些苔藓和蕨类植物中的数百个编辑位点到种子植物中的较低频率以及地钱中完全缺乏RNA编辑。在这里,我们报告的序列和编辑位点的叶绿体基因组从苔Pellia endiviifolia。叶绿体RNA编辑的类型和频率显示出与种子植物高度相似的模式。对C到U转换和嵌入编辑位点的基因组背景的分析提供了支持叶绿体RNA编辑进化以补偿第一种陆地植物中突变的假设的证据。
RNA editing is a post-transcriptional process that can act upon transcripts from mitochondrial, nuclear, and chloroplast genomes. In chloroplasts, single-nucleotide conversions in mRNAs via RNA editing occur at different frequencies across the plant kingdom. These range from several hundred edited sites in some mosses and ferns to lower frequencies in seed plants and the complete lack of RNA editing in the liverwort Marchantia polymorpha. Here, we report the sequence and edited sites of the chloroplast genome from the liverwort Pellia endiviifolia. The type and frequency of chloroplast RNA editing display a pattern highly similar to that in seed plants. Analyses of the C to U conversions and the genomic context in which the editing sites are embedded provide evidence in favor of the hypothesis that chloroplast RNA editing evolved to compensate mutations in the first land plants.
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