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-Structure paper
タイトル | SARS-CoV-2 S2P spike ages through distinct states with altered immunogenicity. |
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ジャーナル・号・ページ | J Biol Chem, Vol. 297, Issue 4, Page 101127, Year 2021 |
掲載日 | 2021年8月27日 |
著者 | Adam S Olia / Yaroslav Tsybovsky / Steven J Chen / Cuiping Liu / Alexandra F Nazzari / Li Ou / Lingshu Wang / Wing-Pui Kong / Kwan Leung / Tracy Liu / Tyler Stephens / I-Ting Teng / Shuishu Wang / Eun Sung Yang / Baoshan Zhang / Yi Zhang / Tongqing Zhou / John R Mascola / Peter D Kwong / |
PubMed 要旨 | The SARS-CoV-2 spike is the primary target of virus-neutralizing antibodies and critical to the development of effective vaccines against COVID-19. Here, we demonstrate that the prefusion-stabilized ...The SARS-CoV-2 spike is the primary target of virus-neutralizing antibodies and critical to the development of effective vaccines against COVID-19. Here, we demonstrate that the prefusion-stabilized two-proline "S2P" spike-widely employed for laboratory work and clinical studies-unfolds when stored at 4 °C, physiological pH, as observed by electron microscopy (EM) and differential scanning calorimetry, but that its trimeric, native-like conformation can be reacquired by low pH treatment. When stored for approximately 1 week, this unfolding does not significantly alter antigenic characteristics; however, longer storage diminishes antibody binding, and month-old spike elicits virtually no neutralization in mice despite inducing high ELISA-binding titers. Cryo-EM structures reveal the folded fraction of spike to decrease with aging; however, its structure remains largely similar, although with varying mobility of the receptor-binding domain. Thus, the SARS-CoV-2 spike is susceptible to unfolding, which affects immunogenicity, highlighting the need to monitor its integrity. |
リンク | J Biol Chem / PubMed:34461095 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.6 - 3.5 Å |
構造データ | EMDB-23982, PDB-7mtc: EMDB-23983, PDB-7mtd: EMDB-23984, PDB-7mte: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN / COVID-19 / SARS-CoV-2 spike / S2P |