Immunodominant linear B cell epitopes in the spike and membrane proteins of SARS-CoV-2 identified by immunoinformatics prediction and immunoassay


Posted: 2021-10-15 19:00:00
SARS-CoV-2 continues to infect an ever-expanding number of people, resulting in an increase in the number of deaths globally. With the emergence of new variants, there is a corresponding decrease in the currently available vaccine efficacy, highlighting the need for greater insights into the viral epitope profile for both vaccine design and assessment. In this study, three immunodominant linear B cell epitopes in the SARS-CoV-2 spike receptor-binding domain (RBD) were identified by immunoinformatics prediction, and confirmed by ELISA with sera from Macaca fascicularis vaccinated with a SARS-CoV-2 RBD subunit vaccine. Further immunoinformatics analyses of these three epitopes gave rise to a method of linear B cell epitope prediction and selection. B cell epitopes in the spike (S), membrane (M), and envelope (E) proteins were subsequently predicted and confirmed using convalescent sera from COVID-19 infected patients. Immunodominant epitopes were identified in three regions of the S2 domain, one region at the S1/S2 cleavage site and one region at the C-terminus of the M protein. Epitope mapping revealed that most of the amino acid changes found in variants of concern are located within B cell epitopes in the NTD, RBD, and S1/S2 cleavage site. This work provides insights into B cell epitopes of SARS-CoV-2 as well as immunoinformatics methods for B cell epitope prediction, which will improve and enhance SARS-CoV-2 vaccine development against emergent variants.

参考サイト PubMed: covid-19



バイオクイックニュース日本語版:COVID-19特集

バイオクイックニュース日本語版
9月 23, 2020 バイオアソシエイツ

既存薬物のエブセレンがCOVID-19の新しい治療戦略の開発に役立つ可能性

2019年後半に中国の武漢市で初めて出現したSARS-CoV-2ウイルスは、世界中で病気と死を引き起こしている。 既に承認された医薬品の転用を含め、 COVID-19 を治療するための複数のソリューションが検討されてきたが、この研究は非常に有望な治療オプションを指摘している。シカゴ大学のプリツカー分子工学大学院(PME)の研究チームは、最先端のコンピューターシミュレーションを使用して、この世界的なパンデミックの解決策を迅速に追跡できる既存の薬物を特定した。 彼らの発見は、2020年8月14日にScience…

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