期刊
NUCLEIC ACIDS RESEARCH
卷 45, 期 10, 页码 6119-6134出版社
OXFORD UNIV PRESS
DOI: 10.1093/nar/gkx162
关键词
-
资金
- Institut National de la Recherche Agronomique [INRA UMR 1318]
- China Scholarship Council
- French Ministere de l'Enseignement et de la Recherche
- Fondation pour la Recherche Medicale [FDT20160736470]
- Institut Jean-Pierre Bourgin [INRA UMR1318]
RNA expression in plant mitochondria implies a large number of post-transcriptional events in which transcript processing and stabilization are essential. In this study, we analyzed the function of the Arabidopsis mitochondrial stability factor 2 gene (MTSF2) and show that the encoded pentatricopeptide repeat protein is essential for the accumulation of stable nad1 mRNA. The production of mature nad1 requires the assembly of three independent RNA precursors via two trans-splicing reactions. Genetic analyses revealed that the lack of nad1 in mtsf2 mutants results from the specific destabilization of the nad1 exons 2-3 precursor transcript. We further demonstrated that MTSF2 binds to its 3' extremity with high affinity, suggesting a protective action by blocking exoribonuclease progression. By defining the 3' end of nad1 exons 2-3 precursor, MTSF2 concomitantly determines the 3' extremity of the first half of the trans-intron found at the end of the transcript. Therefore, binding of the MTSF2 protein to nad1 exons 2-3 precursor evolved both to stabilize the transcript and to define a 3' extremity compatible with the trans-splicing reaction needed to reconstitute mature nad1. We thus reveal that the range of transcripts stabilized by association with protective protein on their 3' end concerns also mitochondrial precursor transcripts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据