U-box泛素连接酶调控植物抗逆和生长发育

U-box E3 Ubiquitin Ligases Regulate Stress Tolerance and Growth of Plants

泛素化是真核生物蛋白质转录后修饰的重要方式之一。泛素连接酶决定了泛素化过程底物的特异性,在植物抗病、抗旱、耐盐、抗寒和生长发育各个阶段都发挥重要作用。泛素连接酶包括RING、U-box、HECT和F-box四大类。该文对U-box泛素连接酶在植物抗逆和生长发育过程中的作用进行了总结,并对今后的研究提出了建议,以期为进一步了解植物泛素化调控通路提供依据。

Ubiquitin-mediated proteolysis is an integral part of diverse cellular functions. As a component of the ubiquitin conjugation system, E3 ubiquitin ligase is the key element determining the substrate specificity of ubiquitination. E3 ligase plays an important role against various environmental stresses such as drought, salinity, chilling, and pathogen attack and has a function in plant growth and development. There are 4 different types of E3 ubiquitin ligases： RING, U-box, HECT, and F-box. We summarize the recent progress in the function of U-box E3 ubiquitin ligases in plant biotic/abiotic stress resistance and development. We also discuss possible directions that might provide valuable information for further research of the regulation of ubiquitin-mediated plant proteolysis.