期刊文献+

SARS冠状病毒PLpro蛋白酶的结构与功能 被引量:18

Structure and Functions of Papain-like Protease of Severe Acute Respiratory Syndrome(SARS) Coronavirus
下载PDF
导出
摘要 SARS冠状病毒基因组编码2种病毒蛋白酶,即木瓜样蛋白酶(PLpro)和3C样蛋白酶(3CLpro).其中,PLpro蛋白酶结构与功能研究是近年来冠状病毒分子生物学研究的热点之一.PLpro蛋白酶参与SARS冠状病毒1a(1ab)复制酶多聚蛋白N端部分的切割加工,是SARS冠状病毒复制酶复合体(RC)形成的重要调节蛋白分子;最新研究表明,SARS冠状病毒PLpro蛋白酶是一种病毒编码的去泛素化酶(DUB),对细胞蛋白具有明显去泛素化作用;而且对泛素(Ub)和泛素样分子ISG15均具有活性.PLpro蛋白酶对宿主抗病毒天然免疫反应具有负调节作用,是SARS冠状病毒的一种重要干扰素拮抗分子.PLpro蛋白酶是一种多功能病毒蛋白酶.本文结合作者课题组研究工作,对SARS冠状病毒PLpro蛋白酶结构和功能研究最新进展进行综述. Severe acute respiratory syndrome(SARS) coronavirus genome encodes two viral proteases: a papain-like protease(PLpro) and a 3C-like protease(3CLpro).PLpro has proteolytic activity in the cleavage and processing of N-terminals of replicase protein pp1a(pp1ab) to release the processed products of nonstructural proteins(nsp) 1 to nsp3,which plays an important regulatory role in assembling of SARS coronavirus functional replicase complex(RC) on intracellular membrane.Recent studies have revealed that SARS PLpro is a viral encoded deubiquitinase(DUB) enzyme capable of deubiquitinating cellular proteins in vivo.The DUB activity of PLpro is effective against both ubiquitin and the ubiquitin-like molecule,ISG15.PLpro is able to inhibit antiviral innate immunity response and therefore functions as interferon antagonist by blocking phosphorylation and activation of IRF-3,thereby antagonizing IFNβ induction.SARS-CoV PLpro is a multifunctional protease with nature of viral protease,DUB and IFN antagonist.This review will focus on recent progresses in our understanding of structure and functions of PLpro of SARS coronavirus.
出处 《中国生物化学与分子生物学报》 CAS CSCD 北大核心 2010年第1期15-21,共7页 Chinese Journal of Biochemistry and Molecular Biology
基金 国家自然科学基金项目(No.30972761 No.30870536 No.30671843) 北京市自然科学基金项目(No.7092075) 国家"863"高技术项目(No.2006AA02Z412)~~
关键词 SARS冠状病毒 PLpro蛋白酶 去泛素化酶 抗病毒天然免疫 干扰素拮抗剂 SARS coronavirus papain-like protease deubiquitinase antiviral innate immunity interferon antagonist
  • 相关文献

参考文献4

二级参考文献57

  • 1AndreaK.PERRY,GangCHEN,DahaiZHENG,HongTANG,GenhongCHENG.The host type I interferon response to viral and bacterial infections[J].Cell Research,2005,15(6):407-422. 被引量:12
  • 2Honda K, Yanai H, Takaoka A, Taniguchi T. Regulation of the type I IFN induction: a current view. Int Immunol 2005; 17:1367-78. 被引量:1
  • 3Medzhitov R ,Janeway CA Jr. Decoding the patterns of self and nonself by the innate immune system. Science 2002; 296:298-300. 被引量:1
  • 4Akira S Takeda K. Toll-like receptor signalling. Nat Rev Immunol 2004; 4:499-511. 被引量:1
  • 5Yoneyama M, Kikuchi M, Natsukawa T, et al. The RNA helicase RIG-I has an essential function in double-stranded RNA-induced innate antiviral responses. Nat Immunol 2004; 5:730-7. 被引量:1
  • 6Maniatis T, Falvo JV, Kim TH, et al. Structure and function of the interferon-beta enhanceosome. Cold Spring Harb Symp Quant Biol 1998; 63:609-620. 被引量:1
  • 7Silverman N, Maniatis T. NF-kappa B signaling pathways in mammalian and insect innate immunity. Genes Dev 2001;15:2321-42. 被引量:1
  • 8Fitzgerald KA, Mc Whirter SM, Faia KL, et al. IKKepsilon and TBKI are essential components of the IRF3 signaling pathway.Nat Immunol 2003; 4:491-6. 被引量:1
  • 9Sharma S, tenOever BR, Grandvaux N, et al. Triggering the interferon antiviral response through an IKK-related pathway.Science 2003; 300:1148-51. 被引量:1
  • 10Honda K, Yanai H, Negishi H, et al, IRF-7 is the master regulator of type-Ⅰ interferon-dependent immune responses, Nature 2005;434:772-7. 被引量:1

共引文献81

同被引文献234

引证文献18

二级引证文献119

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部