Correction of Frameshift Mutations in the atpB Gene by Translational Recoding 
in Chloroplasts of Oenothera and Tobacco

Malinova, I.; Zupok, A.; Massouh, A.; Schöttler, M. A.; Meyer, E. H.; Yaneva-Roder, L.; Szymanski, Witold G.; Rößner, M.; Ruf, S.; Bock, R.; Greiner, S.

doi:10.1093/plcell/koab050

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Correction of Frameshift Mutations in the atpB Gene by Translational Recoding in Chloroplasts of Oenothera and Tobacco

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Malinova, I.
Cytoplasmic and Evolutionary Genetics, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Zupok, A.
Cytoplasmic and Evolutionary Genetics, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Massouh, A.
Cytoplasmic and Evolutionary Genetics, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Schöttler, M. A.
Photosynthesis Research, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Meyer, E. H.
Organelle Biology and Biotechnology, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Yaneva-Roder, L.
Cytoplasmic and Evolutionary Genetics, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Szymanski, Witold G.
Signalling Proteomics, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Rößner, M.
Organelle Biology and Biotechnology, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Ruf, S.
Organelle Biology and Biotechnology, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Bock, R.
Organelle Biology and Biotechnology, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Greiner, S.
Cytoplasmic and Evolutionary Genetics, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Citation

Malinova, I., Zupok, A., Massouh, A., Schöttler, M. A., Meyer, E. H., Yaneva-Roder, L., et al. (2021). Correction of Frameshift Mutations in the atpB Gene by Translational Recoding in Chloroplasts of Oenothera and Tobacco. The Plant Cell, 33(5), 1682-1705. doi:10.1093/plcell/koab050.

Cite as: https://hdl.handle.net/21.11116/0000-0008-2FBD-0

Abstract

Translational recoding, also known as ribosomal frameshifting, is a process that causes ribosome slippage along the messenger RNA, thereby changing the amino acid sequence of the synthesized protein. Whether the chloroplast employs recoding is unknown. I-iota, a plastome mutant of Oenothera (evening primrose), carries a single adenine insertion in an oligoA stretch [11A] of the atpB coding region (encoding a β-subunit of the ATP synthase). The mutation is expected to cause synthesis of a truncated, non-functional protein. We report that a full-length AtpB protein is detectable in I-iota leaves, suggesting operation of a recoding mechanism. To characterize the phenomenon, we generated transplastomic tobacco lines in which the atpB reading frame was altered by insertions or deletions in the oligoA motif. We observed that insertion of two adenines was more efficiently corrected than insertion of a single adenine, or deletion of one or two adenines. We further show that homopolymeric composition of the oligoA stretch is essential for recoding, as an additional replacement of AAA lysine codon by AAG resulted in an albino phenotype. Our work provides evidence for the operation of translational recoding in chloroplasts. Recoding enables correction of frameshift mutations and can restore photoautotrophic growth in the presence of mutation that otherwise would be lethal.