选择性自噬接头蛋白p62/sequestosome 1的研究进展

摘要

p62/sequestosome-1（SQSTM1）是一种重要的选择性自噬接头蛋白，其含有泛素相关结构域、Kelch样环氧氯丙烷相关蛋白的作用区、微管相关蛋白1A/1B轻链3作用域、肿瘤坏死因子受体相关因子6、Phox和Bem1p结构域和ZZ型锌指区6个功能区域。p62/SQSTM1在清除泛素化蛋白中起着重要作用；它同时调节核转录相关因子2-抗氧化反应元件、NF-κB和胱天蛋白酶8介导的凋亡等信号通路；p62/SQSTM1的异常表达与神经退行性病变（如亨廷顿病、阿尔茨海默病、帕金森病）、肿瘤、感染性疾病、遗传性疾病以及慢性疾病的发生发展过程密切相关。目前许多研究进一步明确了p62/SQSTM1的结构功能和作用机制。本文综述了p62/SQSTM1在蛋白质代谢、多个信号通路的调控及其在疾病发生中所起的作用，以期对自噬靶向治疗相关疾病研究提供新的理论依据。%p62/sequestosome-1(SQSTM1)is an important selective autophagy adaptor protein, which contains six functional regions:ubiquitin-binding domain,Keap1 interacting region,LC3 interaction region,tumor necrosis factor receptor-associated factor 6 binding domain,Phox and Bem1p and ZZ-type zinc finger domain. p62/SQSTM1 plays an important role in the removal of ubiquitin proteins. It also regulates the signaling pathway of nuclear factor erythroid 2 related factor 2-antioxidant respose element, NF-κB and the caspase-8 mediated apoptosis. The abnormal expression of p62/SQSTM 8 is closely related to neurodegenerative diseases (such as Huntington disease,Alzheimer disease,Parkinson disease),cancer,infective diseases,genetic diseases and chronic diseases. So far many researchers have shed light on the structure function and mechanism of p62/SQSTM1. This paper reviews the role of p62/SQSTM1 in the metabolism of proteins,the regulation of multiple signaling pathways and in the occurrence of diseases in order to provide a new theoretical basis for the treatment of autophagy targets.