Cited by 34Mitochondrial Function and PathologyRNA and protein synthesis mechanismsRNA Research and Splicing

The Schizosaccharomyces pombe PPR protein Ppr10 associates with a novel protein Mpa1 and acts as a mitochondrial translational activator

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Wang, Yirong, Yan, Jianhua, Zhang, Qingzhen, Ma, Xuting, Zhang, Juan, Su, Minghui, Wang, Xiaojun, Huang, Ying·2017·Nucleic Acids Research

Abstract

The pentatricopeptide repeat (PPR) proteins characterized by tandem repeats of a degenerate 35-amino-acid motif function in all aspects of organellar RNA metabolism, many of which are essential for organellar gene expression. In this study, we report the characterization of a fission yeast Schizosaccharomyces pombe PPR protein, Ppr10 and a novel Ppr10-associated protein, designated Mpa1. The ppr10 deletion mutant exhibits growth defects in respiratory media, and is dramatically impaired for viability during the late-stationary phase. Deletion of ppr10 affects the accumulation of specific mitochondrial mRNAs. Furthermore, deletion of ppr10 severely impairs mitochondrial protein synthesis, suggesting that Ppr10 plays a general role in mitochondrial protein synthesis. Ppr10 interacts with Mpa1 in vivo and in vitro and the two proteins colocalize in the mitochondrial matrix. The ppr10 and mpa1 deletion mutants exhibit very similar phenotypes. One of Mpa1's functions is to maintain the normal protein level of Ppr10 protein by protecting it from degradation by the mitochondrial matrix protease Lon1. Our findings suggest that Ppr10 functions as a general mitochondrial translational activator, likely through interaction with mitochondrial mRNAs and mitochondrial translation initiation factor Mti2, and that Ppr10 requires Mpa1 association for stability and function.

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  1. [50]Ausubel F.M., Brent R., Kingston R.E., Moore D.D., Seidman J.G., Struhl K. Current Protocols in Molecular Biology. 1993; Boston, Mass: John Wiley & sons.

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Authors
Wang, Y., Yan, J., Zhang, Q., Ma, X., Zhang, J., Su, M., Wang, X., & Huang, Y.
Affiliations
Nanjing Normal University (CN)
Corresponding author
Huang, Ying
Venue
Nucleic Acids Research
Published
2017-02-22
Volume
45
Issue
6
Pages
3323-3340
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2589975971
Cited by
34
References
84
Citations by year
2026: 3 · 2025: 3 · 2024: 6 · 2023: 1 · 2022: 8 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 7
FWCI
1.12
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (31470778)
  • Priority Academic Program Development of Jiangsu Higher Education Institutions
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
Keywords
pentatricopeptide repeat proteins, mitochondrial translation, mitochondrial mRNA, protein stability, Schizosaccharomyces pombe, protein-protein interaction
MeSH terms
RNA, Mitochondrial, Carrier Proteins, DNA, Mitochondrial, Mitochondria, Mutation, Phenotype, RNA, RNA, Messenger, Schizosaccharomyces, Protein Biosynthesis, RNA-Binding Proteins, Mitochondrial Proteins, Schizosaccharomyces pombe Proteins, Eukaryotic Initiation Factors

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