Cited by 72RNA Research and SplicingPhotosynthetic Processes and MechanismsPlant Molecular Biology Research

The mitochondrial pentatricopeptide repeat protein PPR 19 is involved in the stabilization of NADH dehydrogenase 1 transcripts and is crucial for mitochondrial function and Arabidopsis thaliana development

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Lee, Kwanuk, Han, Ji Hoon, Park, Youn‐Il, Colas des Francs‐Small, Catherine, Small, Ian, Kang, Hunseung·2017·New Phytologist

Abstract

Despite the importance of pentatricopeptide repeat (PPR) proteins in organellar RNA metabolism and plant development, the functions of many PPR proteins remain unknown. Here, we determined the role of a mitochondrial PPR protein (At1g52620) comprising 19 PPR motifs, thus named PPR19, in Arabidopsis thaliana. The ppr19 mutant displayed abnormal seed development, reduced seed yield, delayed seed germination, and retarded growth, indicating that PPR19 is indispensable for normal growth and development of Arabidopsis thaliana. Splicing pattern analysis of mitochondrial genes revealed that PPR19 specifically binds to the specific sequence in the 3'-terminus of the NADH dehydrogenase 1 (nad1) transcript and stabilizes transcripts containing the second and third exons of nad1. Loss of these transcripts in ppr19 leads to multiple secondary effects on accumulation and splicing of other nad1 transcripts, from which we can infer the order in which cis- and trans-spliced nad1 transcripts are normally processed. Improper splicing of nad1 transcripts leads to the absence of mitochondrial complex I and alteration of the nuclear transcriptome, notably influencing the alternative splicing of a variety of nuclear genes. Our results indicate that the mitochondrial PPR19 is an essential component in the splicing of nad1 transcripts, which is crucial for mitochondrial function and plant development.

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Authors
Lee, K., Han, J. H., Park, Y., Colas des Francs‐Small, C., Small, I., & Kang, H.
Affiliations
  • Chonnam National University (KR)
  • Chungnam National University (KR)
  • ARC Centre of Excellence in Plant Energy Biology University of Western Australia 35 Stirling Highway Crawley WA 6009 Australia
  • The University of Western Australia (AU)
Corresponding author
  • Small, Ian
  • Kang, Hunseung
Venue
New Phytologist
Publisher
Wiley
Published
2017-03-23
Volume
215
Issue
1
Pages
202-216
ISSN
  • 0028-646X (ISSN-L)
  • 1469-8137
OpenAlex
W2602371245
Cited by
72
References
69
Citations by year
2026: 4 · 2025: 1 · 2024: 6 · 2023: 9 · 2022: 12 · 2021: 8 · 2020: 9 · 2019: 13 · 2018: 6 · 2017: 3 · 2012: 1
FWCI
3.46
Type
journal article
Language
en
Open access
Locations
  • New Phytologist (publishedVersion)
  • PubMed (publishedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion, other-oa)
Funders
  • Rural Development Administration
  • National Research Foundation of Korea
  • Ministry of Science, ICT and Future Planning (NRF‐2016R1A2B4009172, NRF-2016R1A2B4009172)
  • Australian Research Council (CE140100008)
  • Next-Generation BioGreen21 Program (PJ01105401)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
Keywords
pentatricopeptide repeat proteins, mitochondrial RNA processing, transcript stability, mitochondrial complex I, alternative splicing, seed development, seed germination, plant development, Arabidopsis thaliana
MeSH terms
Mitochondria, RNA, Messenger, Arabidopsis, Reactive Oxygen Species, Alternative Splicing, Arabidopsis Proteins, Electron Transport Complex I

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