Identification of a minimal peptide derived from heptad repeat (HR) 2 of spike protein of SARS-CoV and combination of HR1-derived peptides as fusion inhibitors.

Identification of a minimal peptide derived from heptad repeat (HR) 2 of spike protein of SARS-CoV and combination of HR1-derived peptides as fusion inhibitors.
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DOI:
10.1016/j.antiviral.2008.10.001
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发表时间:
2009-01
期刊:
影响因子:
7.6
通讯作者:
Wang WK
Wang WK
中科院分区:
医学2区
文献类型:
--
作者:
Liu IJ;Kao CL;Hsieh SC;Wey MT;Kan LS;Wang WK

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SARS-CoV刺突蛋白的七肽重复序列(HR 1和HR 2)是高度保守的区域,在病毒进入的融合步骤中形成关键的6-螺旋束,并且是有吸引力的进入抑制剂的靶点。在本研究中,我们报道了一个最小的HR 2肽,23-mer的P6,可以阻断SARS-CoV的融合,IC 50为1.04 ± 0.22 μM。这一发现支持了HR 1三聚体的深沟作为融合抑制剂靶点的结构预测,并表明P6作为未来药物开发的潜在先导肽。此外,HR-1肽N46及其突变形式N46 eg的组合显示出协同抑制作用,IC 50为1.39 ± 0.05 μM,组合指数为0.75 ± 0.15,这表明HR 1肽对其他I类包膜病毒实现有希望的抑制的常见策略。
The heptad repeats (HR1 and HR2) of the spike protein of SARS-CoV are highly conserved regions forming a critical 6-helix bundle during the fusion step of virus entry and are attractive targets of entry inhibitors. In this study, we report that a minimal HR2 peptide, P6 of 23-mer, can block the fusion of SARS-CoV with an IC50 of 1.04 ± 0.22 μM. This finding supports the structural prediction of the deep groove of HR1 trimer as a target for fusion inhibitors, and suggests P6 as a potential lead peptide for future drug development. Moreover, combination of an HR-1 peptide, N46, and its mutated version, N46eg, shows synergistic inhibition with an IC50 of 1.39 ± 0.05 μM and combination index of 0.75 ± 0.15, suggesting a common strategy to achieve promising inhibition by HR1 peptide for other class I envelope viruses.
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