Perks, Kara L and Rossetti, Giulia and Kuznetsova, Irina and Hughes, Laetitia A and Ermer, Judith A and Ferreira, Nicola and Busch, Jakob D and Rudler, Danielle L and Spahr, Henrik and Schöndorf, Thomas and Shearwood, Ann-Marie J and Viola, Helena M and Siira, Stefan J. and Hool, Livia C and Milenkovic, Dusanka and Larsson, Nils-Göran and Rackham, Oliver and Filipovska, Aleksandra (2018) PTCD1 Is Required for 16S rRNA Maturation Complex Stability and Mitochondrial Ribosome Assembly. Cell Reports, 23 (1). pp.127-142. ISSN 22111247 (OA)
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Abstract
The regulation of mitochondrial RNA life cycles and their roles in ribosome biogenesis and energy metabolism are not fully understood. We used CRISPR/Cas9 to generate heart- and skeletal-muscle-specific knockout mice of the pentatricopeptide repeat domain protein 1, PTCD1, and show that its loss leads to severe cardiomyopathy and premature death. Our detailed transcriptome-wide and functional analyses of these mice enabled us to identify the molecular role of PTCD1 as a 16S rRNA-binding protein essential for its stability, pseudouridylation, and correct biogenesis of the mitochondrial large ribosomal subunit. We show that impaired mitoribosome biogenesis can have retrograde signaling effects on nuclear gene expression through the transcriptional activation of the mTOR pathway and upregulation of cytoplasmic protein synthesis and pro-survival factors in the absence of mitochondrial translation. Taken together, our data show that impaired assembly of the mitoribosome exerts its consequences via differential regulation of mitochondrial and cytoplasmic protein synthesis.
| Item Type: | Article |
|---|---|
| Subjects: | R Medicine > R Medicine (General) |
| Depositing User: | Repository Administrator |
| Date Deposited: | 09 Apr 2018 00:00 |
| Last Modified: | 24 Apr 2018 06:31 |
| URI: | https://eprints.victorchang.edu.au/id/eprint/714 |
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