ジャーナル: iScience / 年: 2023 タイトル: ChAdOx1 COVID vaccines express RBD open prefusion SARS-CoV-2 spikes on the cell surface. 著者: Tao Ni / Luiza Mendonça / Yanan Zhu / Andrew Howe / Julika Radecke / Pranav M Shah / Yuewen Sheng / Anna-Sophia Krebs / Helen M E Duyvesteyn / Elizabeth Allen / Teresa Lambe / Cameron Bisset ...著者: Tao Ni / Luiza Mendonça / Yanan Zhu / Andrew Howe / Julika Radecke / Pranav M Shah / Yuewen Sheng / Anna-Sophia Krebs / Helen M E Duyvesteyn / Elizabeth Allen / Teresa Lambe / Cameron Bisset / Alexandra Spencer / Susan Morris / David I Stuart / Sarah Gilbert / Peijun Zhang / 要旨: Vaccines against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have been proven to be an effective means of decreasing COVID-19 mortality, hospitalization rates, and transmission. One ...Vaccines against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have been proven to be an effective means of decreasing COVID-19 mortality, hospitalization rates, and transmission. One of the vaccines deployed worldwide is ChAdOx1 nCoV-19, which uses an adenovirus vector to drive the expression of the original SARS-CoV-2 spike on the surface of transduced cells. Using cryo-electron tomography and subtomogram averaging, we determined the native structures of the vaccine product expressed on cell surfaces . We show that ChAdOx1-vectored vaccines expressing the Beta SARS-CoV-2 variant produce abundant native prefusion spikes predominantly in one-RBD-up conformation. Furthermore, the ChAdOx1-vectored HexaPro-stabilized spike yields higher cell surface expression, enhanced RBD exposure, and reduced shedding of S1 compared to the wild type. We demonstrate structure determination as a powerful means for studying antigen design options in future vaccine development against emerging novel SARS-CoV-2 variants and broadly against other infectious viruses.