1′-OH of ABA and its analogs is a crucial functional group correspondence to seed germination and development of plants
作者:Chuan Wan、Dongyan Yang、Ruiyuan Liu、Huizhe Lu、Chuanliang Che、Yanjun Xu、Xueqin Zhang、Yumei Xiao、Jia-Qi Li、Zhaohai Qin
DOI:10.1016/j.molstruc.2021.131650
日期:2022.2
plant growth inhibition and abiotic stress responses. Its signal transduction pathway is mediated by a genetically redundant family of ABA receptors (PYLs). In this work, 1′-O methyl ethers of ABA and its analogs were designed for chemically probing PYLs. The results suggested that 1′-OH is a crucial functional group correspondence to seed germination and development of plants, but has little relation
脱落酸 (ABA) 是一种必需的植物激素,参与许多生理过程,包括植物生长抑制和非生物胁迫反应。其信号转导途径由遗传上冗余的 ABA 受体 (PYL) 家族介导。在这项工作中,ABA 的 1'-O 甲基醚及其类似物被设计用于化学探测 PYL。结果表明,1′-OH是植物种子萌发和发育的关键官能团,但与ABA及其类似物调控的气孔运动和干旱胁迫响应关系不大。1'-OH 的甲基化显着降低了它们与单体受体 PYL5 的结合能力,并略微增强了它们与二聚体受体 PYL2 的结合。2a-2c抑制活性降低最有可能归因于与 PYL5 的结合亲和力降低,这是由于氢键网络的破坏。这说明PYL5是一种对植物生长过程有密切反应的选择性受体。