The plasma membrane Na+/H+ antiporter SOS1 has a pivotal role in determining salinity tolerance in plants. This study investigates the structure and function of SOS1 from Oryza sativa (rice), elucidating its architecture and activation mechanism, with notable implications for improving crop salt tolerance.
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References
Munns, R. & Tester, M. Mechanisms of salinity tolerance. Annu. Rev. Plant Biol. 59, 651–681 (2008). A review article summarizing the physiology and molecular mechanisms in response to salinity stress in plants.
Zhu, J. K. Abiotic stress signalling and responses in plants. Cell 167, 313–324 (2016). A review article that presents the core stress-signalling pathways in plants and their involvement in the regulation of stress response proteins.
Wu, S. J. et al. SOS1, a genetic locus essential for salt tolerance and potassium acquisition. Plant Cell 8, 617–627 (1996). This work reports that SOS1 is essential for salt tolerance in plants.
Shi, H. et al. The Arabidopsis thaliana salt tolerance gene SOS1 encodes a putative Na+/H+ antiporter. Proc. Natl Acad. Sci. USA 97, 6896–6901 (2000). This paper characterizes SOS1 as a Na+/H+ antiporter and its regulation by the SOS2–SOS3 pathway.
Quintero, F. J. et al. Activation of the plasma membrane Na/H antiporter Salt-Overly-Sensitive 1 (SOS1) by phosphorylation of an auto-inhibitory C-terminal domain. Proc. Natl Acad. Sci. USA 108, 2611–2616 (2011). This paper reports the identification of an auto-inhibitory domain in SOS1 and of two key residues regulated by SOS2 kinase.
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This is a summary of: Zhang, X. et al. Structure and activation mechanism of the rice Salt Overly Sensitive 1 (SOS1) Na+/H+ antiporter. Nat. Plants https://doi.org/10.1038/s41477-023-01551-5 (2023).
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Structural insight into SOS signalling in response to salt stress. Nat. Plants 9, 1793–1794 (2023). https://doi.org/10.1038/s41477-023-01553-3
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DOI: https://doi.org/10.1038/s41477-023-01553-3
