植物泛素/26S蛋白酶体途径的研究进展

泛素/26S蛋白酶体途径（ubiquitin/26S proteasome pathway，UPP）是目前已知最有效的、最具特异性的蛋白质降解途径。该途径介导了真核生物80%-85%的蛋白质降解，参与了细胞多项生命活动过程，对于维持细胞正常生理功能具有重要意义。研究结果表明，植物生长发育的诸多方面以及干旱胁迫响应等过程都受到该途径的调控。概述了泛素/26S蛋白酶体途径及其在植物生长发育过程中的作用，并着重阐述了由泛素-蛋白连接酶E3介导的植物干旱胁迫响应及其作用机制的研究进展。

The Progress on the Ubiquitin/26S Proteasome Pathway in Plants

Ubiquitin/26S proteasome pathway (UPP) is the most effective, highly selective proteolytic pathway. It mediates 80% to 85% of the protein degradation in eukaryotic cell, participates in various cellular life courses, and plays an important role in maintaining the normal physiological function of the cells. The results show that many aspects of plant growth and development as well as some processes such as drought stress response are all affected by this pathway. It summarizes ubiquitin/26S proteasome pathway, which roles in the processes of plant growth and development, and emphatically elaborates the progress of the plant drought stress response and its mechanism mediated by the ubiquitin-protein ligase E3.