ArticlePlant physiology2016
The MTL1 Pentatricopeptide Repeat Protein Is Required for Both Translation and Splicing of the Mitochondrial NADH DEHYDROGENASE SUBUNIT7 mRNA in Arabidopsis.
Article in Plant physiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.
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40 citing papers in PubMed, 77 citations in OpenAlex.
- Translational activation by a synthetic PPR protein elucidates control of psbA translation in Arabidopsis chloroplasts.The Plant cell · 2024Article
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- Genome-Wide Association Study Identifies a Rice Panicle Blast Resistance GeneInternational journal of molecular sciences · 2022Article
- A chloroplast-localized pentatricopeptide repeat protein involved in RNA editing and splicing and its effects on chloroplast development in rice.BMC plant biology · 2022Article
- Pentatricopeptide repeat protein MITOCHONDRIAL STABILITY FACTOR 3 ensures mitochondrial RNA stability and embryogenesis.Plant physiology · 2022Article
- The P-type pentatricopeptide repeat protein DWEORG1 is a non-previously reported rPPR protein of Arabidopsis mitochondria.Scientific reports · 2022Article
- Mitochondrion-encoded circular RNAs are widespread and translatable in plants.Plant physiology · 2022Article
- A mitochondrial RNA processing protein mediates plant immunity to a broad spectrum of pathogens by modulating the mitochondrial oxidative burst.The Plant cell · 2022Article
- Article
- Nucleo-cytoplasmic interactions affect the 5' terminal transcription of mitochondrial genes between the isonuclear CMS line UG93A and its maintainer line UG93B of kenaf (Hibiscus cannabinus).Development genes and evolution · 2021Article
- OsNBL3, a mitochondrion-localized pentatricopeptide repeat protein, is involved in splicing nad5 intron 4 and its disruption causes lesion mimic phenotype with enhanced resistance to biotic and abiotic stresses.Plant biotechnology journal · 2021Article
- Functions of PPR Proteins in Plant Growth and Development.International journal of molecular sciences · 2021Review
- PPR647 Protein Is Required for Chloroplast RNA Editing, Splicing and Chloroplast Development in Maize.International journal of molecular sciences · 2021Article
- The radish Ogura fertility restorer impedes translation elongation along its cognate CMS-causing mRNA.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- A Case of Gene Fragmentation in Plant Mitochondria Fixed by the Selection of a Compensatory Restorer of Fertility-Like PPR Gene.Molecular biology and evolution · 2021Article
- A RanBP2-type zinc finger protein functions in intron splicing in Arabidopsis mitochondria and is involved in the biogenesis of respiratory complex I.Nucleic acids research · 2021Article
- EMP32 is required for theRNA biology · 2021Article
- Rice FLOURY SHRUNKEN ENDOSPERM 5 Encodes a Putative Plant Organelle RNA Recognition Protein that Is Required for cis-Splicing of Mitochondrial nad4 Intron 1.Rice (New York, N.Y.) · 2021Article
- Cotton Fiber Development Requires the Pentatricopeptide Repeat Protein GhIm for Splicing of Mitochondrial nad7 mRNA.Genetics · 2021Article
- OsPPR939, a nad5 splicing factor, is essential for plant growth and pollen development in rice.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2021Article
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Authors and funding
8 authors at 2 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Mitochondrial translation involves a complex interplay of ancient bacteria-like features and host-derived functionalities. Although the basic components of the mitochondrial translation apparatus have been recognized, very few protein factors aiding in recruiting ribosomes on mitochondria-encoded messenger RNA (mRNAs) have been identified in higher plants. In this study, we describe the identification of the Arabidopsis (Arabidopsis thaliana) MITOCHONDRIAL TRANSLATION FACTOR1 (MTL1) protein, a new member of the Pentatricopeptide Repeat family, and show that it is essential for the translation of the mitochondrial NADH dehydrogenase subunit7 (nad7) mRNA. We demonstrate that mtl1 mutant plants fail to accumulate the Nad7 protein, even though the nad7 mature mRNA is produced and bears the same 5' and 3' extremities as in wild-type plants. We next observed that polysome association of nad7 mature mRNA is specifically disrupted in mtl1 mutants, indicating that the absence of Nad7 results from a lack of translation of nad7 mRNA. These findings illustrate that mitochondrial translation requires the intervention of gene-specific nucleus-encoded PPR trans-factors and that their action does not necessarily involve the 5' processing of their target mRNA, as observed previously. Interestingly, a partial decrease in nad7 intron 2 splicing was also detected in mtl1 mutants, suggesting that MTL1 is also involved in group II intron splicing. However, this second function appears to be less essential for nad7 expression than its role in translation. MTL1 will be instrumental to understand the multifunctionality of PPR proteins and the mechanisms governing mRNA translation and intron splicing in plant mitochondria.
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