Abstract
Mammalian mitochondria have their own dedicated protein synthesis system, which produces 13 essential subunits of the oxidative phosphorylation complexes. Here, we describe the in vitro reconstitution of the mammalian mitochondrial translation system, utilizing purified recombinant mitochondrial translation factors, 55S ribosomes from pig liver mitochondria, and a heterologous yeast tRNA mixture. The system is capable of translating leaderless mRNAs encoding model proteins, such as nanoluciferase with a molecular weight of 19 kDa, and is readily applicable for in vitro evaluations of mRNAs and nascent peptide chain sequences, as well as factors and small molecules that affect mitochondrial translation.
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Acknowledgements
We would like to thank all the laboratory members who were involved in this project. This work was supported in part by grants to N.T. from MEXT/JSPS Grant-in-Aid for Scientific Research (18K06054), The Naito Foundation, The Hamaguchi Foundation for the Advancement of Biochemistry, The Koyanagi Foundation, and The TERUMO LIFE SCIENCE FOUNDATION.
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Lee, M., Takeuchi-Tomita, N. (2023). Reconstitution of Mammalian Mitochondrial Translation System Capable of Long Polypeptide Synthesis. In: Barrientos, A., Fontanesi, F. (eds) The Mitoribosome. Methods in Molecular Biology, vol 2661. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3171-3_14
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DOI: https://doi.org/10.1007/978-1-0716-3171-3_14
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