Structure of the Vif-binding domain of the antiviral enzyme APOBEC3G.
Structure of the Vif-binding domain of the antiviral enzyme APOBEC3G.
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DOI:
10.1038/nsmb.3033
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发表时间:
2015-06
影响因子:
16.8
通讯作者:
Matsuo, Hiroshi
中科院分区:
文献类型:
--
作者:
Kouno, Takahide;Luengas, Elizabeth M.;Shigematsu, Megumi;Shandilya, Shivender M. D.;Zhang, JingYing;Chen, Luan;Hara, Mayuko;Schiffer, Celia A.;Harris, Reuben S.;Matsuo, Hiroshi
The human APOBEC3G (A3G) DNA cytosine deaminase restricts and hypermutates DNA-based parasites including HIV-1. The viral infectivity factor (Vif) prevents restriction by triggering A3G degradation. While the structure of the A3G catalytic domain is known, the structure of the N-terminal Vif-binding domain has proven more elusive. Here, evolution- and structure-guided mutagenesis was used to solubilize the Vif-binding domain of A3G permitting structural determination by NMR spectroscopy. A smaller zinc-coordinating pocket and altered helical packing distinguish it from catalytic domain structures, and help explain the reported inactivity of this domain. This soluble A3G N-terminal domain is bound by Vif, which enabled mutagenesis and biochemical experiments to identify a unique Vif-interacting surface formed by α1-β1, β2-α2, and β4-α4 loops. This structure sheds new light on the Vif-A3G interaction and provides critical information for future drug development.
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影响因子:
16.6
作者:
通讯作者:
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影响因子:
5.6
作者:
Desimmie, Belete A.;Delviks-Frankenberrry, Krista A.;Burdick, Ryan C.;Qi, DongFei;Izumi, Taisuke;Pathak, Vinay K.
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Pathak, Vinay K.
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64.8
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5.4
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3.5
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