Cited by 366Mitochondrial Function and PathologyRNA Research and SplicingRNA and protein synthesis mechanisms

PNPASE Regulates RNA Import into Mitochondria

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Wang, Geng, Chen, Hsiao-Wen, Oktay, Yavuz, Zhang, Jin, Allen, Eric L., Smith, Geoffrey M., Fan, Kelly C., Hong, Jason S. +6 more·2010·Cell

Abstract

RNA import into mammalian mitochondria is considered essential for replication, transcription, and translation of the mitochondrial genome but the pathway(s) and factors that control this import are poorly understood. Previously, we localized polynucleotide phosphorylase (PNPASE), a 3' --> 5' exoribonuclease and poly-A polymerase, in the mitochondrial intermembrane space, a location lacking resident RNAs. Here, we show a new role for PNPASE in regulating the import of nuclear-encoded RNAs into the mitochondrial matrix. PNPASE reduction impaired mitochondrial RNA processing and polycistronic transcripts accumulated. Augmented import of RNase P, 5S rRNA, and MRP RNAs depended on PNPASE expression and PNPASE-imported RNA interactions were identified. PNPASE RNA processing and import activities were separable and a mitochondrial RNA targeting signal was isolated that enabled RNA import in a PNPASE-dependent manner. Combined, these data strongly support an unanticipated role for PNPASE in mediating the translocation of RNAs into mitochondria.

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Authors
Wang, G., Chen, H.-W., Oktay, Y., Zhang, J., Allen, E. L., Smith, G. M., Fan, K. C., Hong, J. S., French, S. W., McCaffery, J. M., Lightowlers, R. N., Morse, H. C., Koehler, C. M., & Teitell, M. A.
Affiliations
  • University of California, Los Angeles (US)
  • University of California, Irvine (US)
  • Johns Hopkins University (US)
  • Newcastle University (GB)
  • National Institutes of Health (US)
  • California NanoSystems Institute (US)
Corresponding author
  • Koehler, Carla M.
  • Teitell, Michael A.
Venue
Cell
Publisher
Elsevier BV
Published
2010-08
Volume
142
Issue
3
Pages
456-467
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2154990937
Cited by
366
References
42
Citations by year
2026: 16 · 2025: 21 · 2024: 25 · 2023: 17 · 2022: 31 · 2021: 28 · 2020: 24 · 2019: 27 · 2018: 26 · 2017: 18 · 2016: 20 · 2015: 22 · 2014: 14 · 2013: 26 · 2012: 26
FWCI
9.91
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Newcastle University ePrints (Newcastle Univesity)
Funders
  • Wellcome Trust (074454)
  • National Institutes of Health
  • National Eye Institute (PN2EY018228)
  • National Cancer Institute (R01CA107300, R01 CA90571, K22CA120147, R01CA090571, R01CA156674)
  • National Institute of General Medical Sciences (R01GM073981, R01GM061721)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
polynucleotide phosphorylase, mitochondrial RNA import, mitochondrial intermembrane space, mitochondrial matrix, mitochondrial RNA processing, polycistronic transcripts, RNase P, 5S rRNA, 3'-5' exoribonuclease, poly(A) polymerase
MeSH terms
Animals, Cell Line, Humans, Mice, Inbred C57BL, Mitochondria, Polyribonucleotide Nucleotidyltransferase, RNA, RNA Processing, Post-Transcriptional, Saccharomyces cerevisiae, Ribonuclease P, Mice, Gene Knockout Techniques

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