Download MendeleyStructural insights into the Oryza sativa cation transporters HKTs in salt tolerance.
Gao, R., Jia, Y., Xu, X., Fu, P., Zhou, J., Yang, G.(2024) J Integr Plant Biol 66: 700-708
- PubMed: 38409933 Search on PubMed
- DOI: https://doi.org/10.1111/jipb.13632
- Primary Citation Related Structures:
8Y6J, 8Y6L, 8Y6M, 8Y6N - PubMed Abstract:
The high-affinity potassium transporters (HKTs), selectively permeable to either Na + alone or Na + /K + , play pivotal roles in maintaining plant Na + /K + homeostasis. Although their involvement in salt tolerance is widely reported, the molecular underpinnings of Oryza sativa HKTs remain elusive. In this study, we elucidate the structures of OsHKT1;1 and OsHKT2;1, representing two distinct classes of rice HKTs. The dimeric assembled OsHKTs can be structurally divided into four domains. At the dimer interface, a half-helix or a loop in the third domain is coordinated by the C-terminal region of the opposite subunit. Additionally, we present the structures of OsHKT1;5 salt-tolerant and salt-sensitive variants, a key quantitative trait locus associated with salt tolerance. The salt-tolerant variant of OsHKT1;5 exhibits enhanced Na + transport capability and displays a more flexible conformation. These findings shed light on the molecular basis of rice HKTs and provide insights into their role in salt tolerance.
- State Key Laboratory of Plant Environmental Resilience, Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
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