Molecular mechanism of divalent-metal-induced activation of NS3 helicase and insights into Zika virus inhibitor design.
Molecular mechanism of divalent-metal-induced activation of NS3 helicase and insights into Zika virus inhibitor design.
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DOI:
10.1093/nar/gkw941
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发表时间:
2016-12-01
影响因子:
14.9
通讯作者:
Jin T
中科院分区:
文献类型:
--
作者:
Cao X;Li Y;Jin X;Li Y;Guo F;Jin T
Zika virus has attracted increasing attention because of its potential for causing human neural disorders, including microcephaly in infants and Guillain–Barré syndrome. Its NS3 helicase domain plays critical roles in NTP-dependent RNA unwinding and translocation during viral replication. Our structural analysis revealed a pre-activation state of NS3 helicase in complex with GTPγS, in which the triphosphate adopts a compact conformation in the absence of any divalent metal ions. In contrast, in the presence of a divalent cation, GTPγS adopts an extended conformation, and the Walker A motif undergoes substantial conformational changes. Both features contribute to more extensive interactions between the GTPγS and the enzyme. Thus, this study provides structural evidence on the allosteric modulation of MgNTP2− on the NS3 helicase activity. Furthermore, the compact conformation of inhibitory NTP identified in this study provides precise information for the rational drug design of small molecule inhibitors for the treatment of ZIKV infection.
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影响因子:
4.8
作者:
Luo, Dahai;Wei, Na;Vasudevan, Subhash G.
通讯作者:
Vasudevan, Subhash G.
影响因子:
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作者:
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DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
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Zwart PH
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4.3
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Lu S;Huang W;Wang Q;Shen Q;Li S;Nussinov R;Zhang J
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影响因子:
5.6
作者:
Appleby TC;Anderson R;Fedorova O;Pyle AM;Wang R;Liu X;Brendza KM;Somoza JR
通讯作者:
Somoza JR