生长素极性运输中PIN蛋白磷酸化修饰研究进展  

Review on the Phosphorylation of PIN Protein in Auxin Transport

作　　者：闫佳 白玉娥[1] Yan Jia;Bai Yu’e(Forestry College of Inner Mongolia Agricultural University,Hohhot,010000)

机构地区：[1]内蒙古农业大学林学院,呼和浩特010000

出　　处：《分子植物育种》2020年第24期8138-8146,共9页Molecular Plant Breeding

基　　金：国家自然科学基金(31660212);国家科技重大专项(2018ZX08020002-005)共同资助。

摘　　要：生长素在植物生长发育过程中具有重要功能,调控其生长发育的诸多过程。生长素通过极性运输建立浓度梯度,维持植物组织器官形成、生长以及形态建成。而PIN蛋白作为生长素运输载体在细胞膜上不对称分布,决定生长素流向,形成浓度梯度,为植物体内各部位细胞的生长发育提供特异的位置和方向信息。在此过程中PIN蛋白磷酸化/去磷酸化修饰以及网格蛋白所介导的胞吞作用等影响着PIN蛋白的极性分布,从而调控植株的形态建成。本研究主要讨论了PIN蛋白磷酸化修饰在生长素极性运输中作用机制,为深入剖析生长素极性运输中PIN蛋白磷酸化机制提供新的见解,也为进一步揭示生长素运输调控的作用机理提供理论参考。Auxin plays an important role in regulating of many development processes at the plants growth. It could establish concentration gradient through polar transport to maintain the formation, growth and morphogenesis of plant tissues and organs. As an auxin transport carrier on the cell membrane, the asymmetric distribution of PIN protein determines the flow direction of auxin, forms a concentration gradient, provides specific position and direction information for the growth and development of cells in various parts of the plant. In this process, the phosphorylation/dephosphorylation of PIN protein and the endocytosis mediated by clathrin affect the polar positioning of PIN protein, thereby regulating the morphogenesis of plants. This study mainly discuss the mechanism of the phosphorylation modification of PIN protein in the polar transport of auxin. It will provide new insights into the molecular mechanism of PIN phosphorylation in auxin polar transport. Furthermore, it also provides a theoretical reference for further revealing the mechanism of auxin transport regulation.

关 键 词：生长素 极性运输 PIN蛋白 蛋白磷酸化 

分 类 号：Q945[生物学—植物学]