Molecular mechanism underlying selective inhibition of mRNA nuclear export by herpesvirus protein ORF10.
Molecular mechanism underlying selective inhibition of mRNA nuclear export by herpesvirus protein ORF10.
复制标题
疱疹病毒蛋白ORF10选择性抑制mRNA核输出的分子机制
DOI:
10.1073/pnas.2007774117
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发表时间:
2020-10-27
影响因子:
11.1
通讯作者:
Gao P
中科院分区:
文献类型:
--
作者:
Feng H;Tian H;Wang Y;Zhang Q;Lin N;Liu S;Yu Y;Deng H;Gao P
Significance Nuclear export of host mRNAs is critical for proper cellular functions and survival. To mitigate this effort, viruses have evolved multiple strategies to inhibit this process. Distinct to the generally nonselective inhibition mechanisms, ORF10 from gammaherpesviruses blocks nuclear export of selective mRNAs by forming a complex with Rae1 (RNA export 1) and Nup98 (nucleoporin 98). Here we determine the structure of the ORF10–Rae1–Nup98 ternary complex and demonstrate that the intermolecular interactions are critical for both complex assembly and mRNA export inhibition. Moreover, we find that the ORF10-RNA direct interaction is important for ORF10-mediated mRNA export inhibition. This work is essential to understand the diversity of viral-mediated mRNA export inhibition and to design potential antiviral therapies. Viruses employ multiple strategies to inhibit host mRNA nuclear export. Distinct to the generally nonselective inhibition mechanisms, ORF10 from gammaherpesviruses inhibits mRNA export in a transcript-selective manner by interacting with Rae1 (RNA export 1) and Nup98 (nucleoporin 98). We now report the structure of ORF10 from MHV-68 (murine gammaherpesvirus 68) bound to the Rae1–Nup98 heterodimer, thereby revealing detailed intermolecular interactions. Structural and functional assays highlight that two highly conserved residues of ORF10, L60 and M413, play critical roles in both complex assembly and mRNA export inhibition. Interestingly, although ORF10 occupies the RNA-binding groove of Rae1–Nup98, the ORF10–Rae1–Nup98 ternary complex still maintains a comparable RNA-binding ability due to the ORF10–RNA direct interaction. Moreover, mutations on the RNA-binding surface of ORF10 disrupt its function of mRNA export inhibition. Our work demonstrates the molecular mechanism of ORF10-mediated selective inhibition and provides insights into the functions of Rae1–Nup98 in regulating host mRNA export.
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影响因子:
4.8
作者:
Blevins, MB;Smith, AM;Powers, MA
通讯作者:
Powers, MA
DOI:
10.1073/pnas.0610977104
发表时间:
2007-02-06
影响因子:
11.1
作者:
Satterly, Neal;Tsai, Pei-Ling;Fontoura, Beatriz M. A.
通讯作者:
Fontoura, Beatriz M. A.
影响因子:
64.5
作者:
Cheng, Hong;Dufu, Kobina;Reed, Robin
通讯作者:
Reed, Robin
影响因子:
6
作者:
Delaleau M;Borden KL
通讯作者:
Borden KL
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH