SARS-CoV-2 Nucleocapsid Protein Has DNA-Melting and Strand-Annealing Activities With Different Properties From SARS-CoV-2 Nsp13.

SARS-CoV-2 Nucleocapsid Protein Has DNA-Melting and Strand-Annealing Activities With Different Properties From SARS-CoV-2 Nsp13.
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SARS-CoV-2 核衣壳蛋白具有 DNA 熔解和链退火活性,其特性与 SARS-CoV-2 – Nsp13 不同

DOI:
10.3389/fmicb.2022.851202
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发表时间:
2022
影响因子:
5.2
通讯作者:
Liu, Yang
Liu, Yang
中科院分区:
生物学2区
文献类型:
--
作者:
Zhang, Bo;Xie, Yan;Lan, Zhaoling;Li, Dayu;Tian, Junjie;Zhang, Qintao;Tian, Hongji;Yang, Jiali;Zhou, Xinnan;Qiu, Shuyi;Lu, Keyu;Liu, Yang

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自2019年12月以来,严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)在全球范围内蔓延,对健康和经济造成了毁灭性影响。SARS-CoV-2蛋白的生物化学特性对于药物设计和开发非常重要。在本研究中,我们发现SARS-CoV-2核衣壳蛋白可以在5′-3′方向上解链双链DNA(dsDNA),类似于SARS-CoV-2非结构蛋白13。然而,发现SARS-CoV-2核衣壳蛋白的解旋活性比SARS-CoV-2非结构蛋白13弱22倍以上,并且解旋过程不依赖于核苷三磷酸和Mg 2+。有趣的是,在低浓度下,SARS-CoV-2核衣壳蛋白表现出比SARS-CoV-2非结构蛋白13更强的退火活性;然而,在高浓度下,它促进了dsDNA的解链。这些发现加深了我们对SARS-CoV-2核衣壳蛋白的理解,并将有助于为抗病毒药物开发提供新的见解。
Since December 2019, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread throughout the world and has had a devastating impact on health and economy. The biochemical characterization of SARS-CoV-2 proteins is important for drug design and development. In this study, we discovered that the SARS-CoV-2 nucleocapsid protein can melt double-stranded DNA (dsDNA) in the 5′-3′ direction, similar to SARS-CoV-2 nonstructural protein 13. However, the unwinding activity of SARS-CoV-2 nucleocapsid protein was found to be more than 22 times weaker than that of SARS-CoV-2 nonstructural protein 13, and the melting process was independent of nucleoside triphosphates and Mg2+. Interestingly, at low concentrations, the SARS-CoV-2 nucleocapsid protein exhibited a stronger annealing activity than SARS-CoV-2 nonstructural protein 13; however, at high concentrations, it promoted the melting of dsDNA. These findings have deepened our understanding of the SARS-CoV-2 nucleocapsid protein and will help provide novel insights into antiviral drug development.
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