From delta to Omicron: S1-RBD/S2 mutation/deletion equilibrium in SARS-CoV-2 defined variants.

From delta to Omicron: S1-RBD/S2 mutation/deletion equilibrium in SARS-CoV-2 defined variants.
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DOI:
10.1016/j.gene.2021.146134
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发表时间:
2022-03-10
期刊:
影响因子:
3.5
通讯作者:
Mastronikolis N
Mastronikolis N
中科院分区:
生物学3区
文献类型:
--
作者:
Papanikolaou V;Chrysovergis A;Ragos V;Tsiambas E;Katsinis S;Manoli A;Papouliakos S;Roukas D;Mastronikolis S;Peschos D;Batistatou A;Kyrodimos E;Mastronikolis N

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2002/2003年冠状病毒相关的严重急性呼吸系统综合征(SARS-CoV),2012/2013年的中东呼吸系统综合征(MERS-CoV),特别是当前的2019/2021年严重急性呼吸系统综合征-2(SARS-CoV-2)对全球各国卫生系统的承受力产生了负面影响。SARS-Cov-2病毒属于β-CoV的谱系B,与BatCoVRaTG 13型具有很强的系统发育相似性。刺突(S)糖蛋白突出物-由两个亚基S1/S2组成-在病毒粒子表面上提供独特的冠状形成(冠)。关于它们的功能作用,S1代表主要的受体结合结构域(RBD),而S2参与病毒-细胞膜融合机制。2021年11月26日,世卫组织将新的SARS-CoV-2菌株命名为Omicron,来自希腊字母表中的字母“μικρο”,作为关注变体(B.1.1529变体)。这种新的变异可能与高传染性相关,导致感染性升高,并可能增加再感染率。其对发病率/死亡率的影响仍在调查之中。在本文中,分析和比较SARS-CoV-2 S RNA序列在定义的变体(Alpha到Omicron)中的改变,我们观察到一些关于S1-RBD/S2突变/缺失平衡的有趣发现,这些平衡可能影响和改变其活性。
Coronavirus-related Severe Acute Respiratory Syndrome (SARS-CoV) in 2002/2003, Middle-East Respiratory Syndrome (MERS-CoV) in 2012/2013, and especially the current 2019/2021 Severe Acute Respiratory Syndrome-2 (SARS-CoV-2) affected negatively the national health systems’ endurance worldwide. SARS-Cov-2 virus belongs to lineage b of beta-CoVs demonstrating a strong phylogenetic similarity with BatCoVRaTG13 type. Spike (S) glycoprotein projections -consisting of two subunits S1/S2- provide a unique crown-like formation (corona) on virion’s surface. Concerning their functional role, S1 represents the main receptor-binding domain (RBD), whereas S2 is involved in the virus-cell membrane fusion mechanism. On Nov 26th 2021, WHO designated the new SARS-CoV-2 strain – named Omicron, from letter ‘’όμικρον’’ in the Greek alphabet - as a variant of concern (B.1.1529 variant). Potentially this new variant is associated with high transmissibility leading to elevated infectivity and probably increased re-infection rates. Its impact on morbidity/mortality remains under investigation. In the current paper, analyzing and comparing the alterations of SARS-CoV-2 S RNA sequences in the defined variants (Alpha to Omicron), we observed some interesting findings regarding the S1-RBD/S2 mutation/deletion equilibrium that maybe affect and modify its activity.
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