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The first report of RNA U to C or G editing in the mitochondrial NADH dehydrogenase subunit 5 (Nad5) transcript of wild barley

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Abstract

Background

Nad dehydrogenase complex in mtDNA has a significant role in cellular respiration. One of the largest subunits in the complex is subunit 5 (Nad5).

Methods and results

Four cDNAs of the Hordeum vulgare subsp. spontaneum nad5 gene have been characterized and subjected to four phases of 0.5 M salinity, at 0 h (control, accession no. MT235236), after 2 h (acc. no. MT235237), after 12 h (acc. no. MT235238) and after 24 h (acc. no. MT235239). Utilizing raw data from RNA-seq, ten RNA editing sites were reported. Seven sites have common editing from C to U in positions (C1490, C1859, C1895, C1900, C1901, C1916, C1918). A rare editing event U to C was detected in two positions (U1650 and U1652) and a novel editing event U to G was for the first time in positions nad5-U231. The highest editing level was shown in 2 and 12 h after salinity exposure. After 24 h, these edits were disrupted, possibly due to the launch of the programed cell death mechanism. However, the RNA editing in positions U1650, U1652 and U231 was fixed at all exposure times.

Conclusions

Although study clarified the role of salinity stress in nad5 RNA editing sites, the main achievements are first report of U to G RNA editing in plants at position U231 and first report of U to C editing in the nad5 gene at U1650 and U1652.

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Data availability

All data generated or analyzed during this study is included in this published article [and its supplementary information files].

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Acknowledgements

This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under Grant No. G- 91-130-1441. The authors, therefore, acknowledge and thank DSR's technical and financial support.

Funding

This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under Grant No. G- 91-130-1441.

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Authors and Affiliations

  1. Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), PO Box 80141, Jeddah, 21589, Saudi Arabia

    Ahmed M. Ramadan, Afnan A. Alnufaei, Thana K. Khan, Hani M. Ali & Sabah M. Hassan

  2. Department of Plant Molecular Biology, Agricultural Genetic Engineering Research Institute (AGERI), Agriculture Research Center (ARC), Giza, Egypt

    Ahmed M. Ramadan & Hala F. Eissa

  3. College of Biotechnology, Misr University for Science and Technology (MUST), 6th October City, Egypt

    Hala F. Eissa

  4. Department of Genetics, Faculty of Agriculture, Ain Shams University, Cairo, Egypt

    Sabah M. Hassan

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  1. Ahmed M. Ramadan
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  2. Afnan A. Alnufaei
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  3. Thana K. Khan
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  4. Hani M. Ali
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Correspondence to Ahmed M. Ramadan.

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Ramadan, A.M., Alnufaei, A.A., Khan, T.K. et al. The first report of RNA U to C or G editing in the mitochondrial NADH dehydrogenase subunit 5 (Nad5) transcript of wild barley. Mol Biol Rep 48, 6057–6064 (2021). https://doi.org/10.1007/s11033-021-06609-1

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