Key Laboratory of Ministry of Education for Medicinal Plant Resource and Natural Pharmaceutical Chemistry, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, China.
National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, China.
Int J Mol Sci. 2023 May 15;24(10):8783. doi: 10.3390/ijms24108783.
Abscisic acid (ABA) plays an important role in the response of plants to drought stress. However, the chemical structure of ABA is unstable, which severely limits its application in agricultural production. Here, we report the identification of a small molecule compound of tetrazolium as an ABA analog (named SLG1) through virtual screening. SLG1 inhibits the seedling growth and promotes drought resistance of with higher stability. Yeast two-hybrid and PP2C inhibition assays show that SLG1 acts as a potent activator of multiple ABA receptors in . Results of molecular docking and molecular dynamics show that SLG1 mainly binds to PYL2 and PYL3 through its tetrazolium group and the combination is stable. Together, these results demonstrate that SLG1, as an ABA analogue, protects from drought stress. Moreover, the newly identified tetrazolium group of SLG1 that binds to ABA receptors can be used as a new option for structural modification of ABA analogs.
脱落酸（ABA）在植物对干旱胁迫的响应中起着重要作用。然而，ABA 的化学结构不稳定，严重限制了其在农业生产中的应用。在这里，我们通过虚拟筛选报告了一种四唑类小分子化合物 ABA 类似物（命名为 SLG1）的鉴定。SLG1 抑制幼苗生长并提高 的抗旱性，具有更高的稳定性。酵母双杂交和 PP2C 抑制试验表明，SLG1 作为一种有效的 ABA 受体激动剂，在 中发挥作用。分子对接和分子动力学的结果表明，SLG1 主要通过其四唑基团与 PYL2 和 PYL3 结合，结合稳定。总之，这些结果表明，SLG1 作为一种 ABA 类似物，可保护 免受干旱胁迫。此外，新鉴定的 SLG1 的结合 ABA 受体的四唑基团可作为 ABA 类似物结构修饰的新选择。
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