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arXiv 2008.12830q-bio.BM
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特征在于PDKEEPAAA通过氨基酸残基的保守进化模式结合SARS-CoV和SARS-CoV-2

Featuring ACE2 binding SARS-CoV and SARS-CoV-2 through a conserved evolutionary pattern of amino acid residues

Patrícia P. D. Carvalho, Nelson A. Alves

摘要:

刺突(S)糖蛋白介导冠状病毒进入宿主细胞。S蛋白的S1亚基包含受体结合结构域(RBD),能够识别不同的宿主受体,突出了其在病毒进化过程中适应宿主的显著能力。虽然刺突蛋白中的RBD是病毒-受体相互作用的决定因素,但活性残基位于受体结合基序(RBM)处,该区域位于RBD中,其在结合其受体的外表面中起基本作用。在这里,我们解决的假设,SARS-CoV和SARS-CoV-2株能够使用血管紧张素转换酶2(ACE 2)蛋白已经适应了他们的RBM沿病毒进化,探索特定的构象拓扑结构驱动的残基YGF感染宿主细胞。我们还推测,这种基于YGF的机制可以作为位于RBM的蛋白质签名,以区分能够使用ACE 2作为细胞进入受体的冠状病毒。

英文摘要:

Spike (S) glycoproteins mediate the coronavirus entry into the host cell. The S1 subunit of S-proteins contains the receptor-binding domain (RBD) that is able to recognize different host receptors, highlighting its remarkable capacity to adapt to their hosts along the viral evolution. While RBD in spike proteins is determinant for the virus-receptor interaction, the active residues lie at the receptor-binding motif (RBM), a region located in RBD that plays a fundamental role binding the outer surface of their receptors. Here, we address the hypothesis that SARS-CoV and SARS-CoV-2 strains able to use angiotensin-converting enzyme 2 (ACE2) proteins have adapted their RBM along the viral evolution to explore specific conformational topology driven by the residues YGF to infect host cells. We also speculate that this YGF-based mechanism can act as a protein signature located at the RBM to distinguish coronaviruses able to use ACE2 as a cell entry receptor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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