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Nonsense-mediated mRNA decay pathway in plants under stress: general gene regulatory mechanism and advances

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Abstract

Main conclusion

Nonsense-mediated mRNA decay in eukaryotes is vital to cellular homeostasis. Further knowledge of its putative role in plant RNA metabolism under stress is pivotal to developing fitness-optimizing strategies.

Abstract

Nonsense-mediated mRNA decay (NMD), part of the mRNA surveillance pathway, is an evolutionarily conserved form of gene regulation in all living organisms. Degradation of mRNA-bearing premature termination codons and regulation of physiological RNA levels highlight NMD’s role in shaping the cellular transcriptome. Initially regarded as purely a tool for cellular RNA quality control, NMD is now considered to mediate various aspects of plant developmental processes and responses to environmental changes. Here we offer a basic understanding of NMD in eukaryotes by explaining the concept of premature termination codon recognition and NMD complex formation. We also provide a detailed overview of the NMD mechanism and its role in gene regulation. The potential role of effectors, including ABCE1, in ribosome recycling during the translation process is also explained. Recent reports of alternatively spliced variants of corresponding genes targeted by NMD in Arabidopsis thaliana are provided in tabular format. Detailed figures are also provided to clarify the NMD concept in plants. In particular, accumulating evidence shows that NMD can serve as a novel alternative strategy for genetic manipulation and can help design RNA-based therapies to combat stress in plants. A key point of emphasis is its function as a gene regulatory mechanism as well as its dynamic regulation by environmental and developmental factors. Overall, a detailed molecular understanding of the NMD mechanism can lead to further diverse applications, such as improving cellular homeostasis in living organisms.

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All data generated or analysed during this study are included in this published article.

Abbreviations

ABCE1:

ATP binding cassette E1

AS:

Alternative splicing

CBC:

Cap-binding complex

eIF:

Eukaryotic translation initiation factor

EJC:

Exon-junction complex

IR:

Intron retention

NMD:

Nonsense-mediated mRNA decay

P-body:

Processing body

PTC:

Premature termination codon

SR:

Serine–arginine

SURF:

SMG1–UPF1–eRF

UPF:

Up-frameshift protein

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Acknowledgements

The authors thank the Vice-Chancellor of Central University of Punjab, India for providing support for the present assignment. Varnika Rana acknowledges the SERB for fellowship. The authors also acknowledge the SERB funding agency for financial help under project CRG/2020/000368. All figure contents were created using Biorender.com. AV is an incumbent of the Wolfson Chair in Floriculture.

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Contributions

VK and AV conceived and designed the study. VK, RL and VR analysed data. RL, VR and VK wrote the manuscript. All authors read and approved the manuscript.

Corresponding author

Correspondence to Vinay Kumar.

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The authors declare that they have no conflict of interest.

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Communicated by Gerhard Leubner.

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Luha, R., Rana, V., Vainstein, A. et al. Nonsense-mediated mRNA decay pathway in plants under stress: general gene regulatory mechanism and advances. Planta 259, 51 (2024). https://doi.org/10.1007/s00425-023-04317-7

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  • DOI: https://doi.org/10.1007/s00425-023-04317-7

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