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arXiv 2004.06361q-bio.BM
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印度SARS-CoV-2刺突蛋白1与ACE2的建模和对接:对共病和治疗干预的意义

Modelling and docking of Indian SARS-CoV-2 spike protein 1 with ACE2: implications for co-morbidity and therapeutic intervention

Dhanashree Jagtap, Selvaa Kumar C, Smita Mahale, Vainav Patel

摘要:

目前,印度是糖尿病(DM)、高血压(HT)和心血管疾病(CVD)等非传染性疾病负担最重的国家之一,因此是SARS-CoV-2/COVID-19大流行的脆弱目标。血管紧张素转换酶2(ACE 2)参与SARS-CoV-2感染易感性和发病机制是目前积极追求的研究领域。DM、HT和CVD患者对感染的易感性增加以及这些环境中较高水平的循环ACE 2,提出了一种情况,即与可溶性ACE 2的相互作用可能导致播散性病毒-受体复合物,从而增强病毒的获得和发病机制。因此,了解SARS-CoV-2受体结合结构域-ACE 2相互作用,无论是膜结合还是在无细胞背景下,都可能有助于阐明合并症在感染易感性增加和发病机制中的作用。阿奇霉素和羟氯喹(HCQ)都显示出减轻感染个体病毒携带的疗效。此外,这些化合物中的每一种都产生活性代谢物,其反过来也可以调节病毒-受体相互作用,从而影响临床结果。在这项研究中,我们模拟的结构相互作用的S1全长和可溶性ACE 2。此外,治疗药物及其活性代谢产物与可溶性ACE 2蛋白对接。我们的研究结果表明,S1从任何一个报告的印度序列可以结合全长和可溶性ACE 2,虽然有不同的亲和力,可以归因于一个报告的RBD中的取代。此外,阿奇霉素和HCQ与其活性代谢产物一起可在一定程度上变构影响S1与ACE 2的结合。

英文摘要:

Presently, India bears amongst the highest burden of non-communicable diseases such as diabetes mellitus (DM), hypertension (HT), and cardio vascular disease (CVD) and thus represents a vulnerable target to the SARS-CoV-2/COVID-19 pandemic. Involvement of the angiotensin converting enzyme 2 (ACE2) in susceptibility to infection and pathogenesis by SARS-CoV-2 is currently an actively pursued research area. An increased susceptibility to infection in individuals with DM, HT and CVD together with higher levels of circulating ACE2 in these settings presents a scenario where interaction with soluble ACE2 may result in disseminated virus-receptor complexes that could enhance virus acquisition and pathogenesis. Thus, understanding the SARS-CoV-2 receptor binding domain-ACE2 interaction, both membrane bound and in the cell free context may contribute to elucidating the role of co-morbidities in increased susceptibility to infection and pathogenesis. Both Azithromycin and Hydroxychloroquine (HCQ) have shown efficacy in mitigating viral carriage in infected individuals. Furthermore, each of these compounds generate active metabolites which in turn may also modulate virus-receptor interaction and thus influence clinical outcomes. In this study, we model the structural interaction of S1 with both full-length and soluble ACE2. Additionally, therapeutic drugs and their active metabolites were docked with soluble ACE2 protein. Our results show that S1 from either of the reported Indian sequences can bind both full-length and soluble ACE2, albeit with varying affinity that can be attributed to a reported substitution in the RBD. Furthermore, both Azythromycin and HCQ together with their active metabolites can allosterically affect, to a range of extents, binding of S1 to ACE2.

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