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-Structure paper
タイトル | Mechanism of an RBM-targeted rabbit monoclonal antibody 9H1 neutralizing SARS-CoV-2. |
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ジャーナル・号・ページ | Biochem Biophys Res Commun, Vol. 660, Page 43-49, Year 2023 |
掲載日 | 2023年4月5日 |
著者 | Xiaoyu Chu / Xinyu Ding / Yixuan Yang / Yuchi Lu / Tinghan Li / Yan Gao / Le Zheng / Hang Xiao / Tingting Yang / Hao Cheng / Haibin Huang / Yang Liu / Yang Lou / Chao Wu / Yuxin Chen / Haitao Yang / Xiaoyun Ji / Hangtian Guo / |
PubMed 要旨 | The COVID-19 pandemic, caused by SARS-CoV-2, has led to over 750 million infections and 6.8 million deaths worldwide since late 2019. Due to the continuous evolution of SARS-CoV-2, many significant ...The COVID-19 pandemic, caused by SARS-CoV-2, has led to over 750 million infections and 6.8 million deaths worldwide since late 2019. Due to the continuous evolution of SARS-CoV-2, many significant variants have emerged, creating ongoing challenges to the prevention and treatment of the pandemic. Therefore, the study of antibody responses against SARS-CoV-2 is essential for the development of vaccines and therapeutics. Here we perform single particle cryo-electron microscopy (cryo-EM) structure determination of a rabbit monoclonal antibody (RmAb) 9H1 in complex with the SARS-CoV-2 wild-type (WT) spike trimer. Our structural analysis shows that 9H1 interacts with the receptor-binding motif (RBM) region of the receptor-binding domain (RBD) on the spike protein and by directly competing with angiotensin-converting enzyme 2 (ACE2), it blocks the binding of the virus to the receptor and achieves neutralization. Our findings suggest that utilizing rabbit-derived mAbs provides valuable insights into the molecular interactions between neutralizing antibodies and spike proteins and may also facilitate the development of therapeutic antibodies and expand the antibody library. |
リンク | Biochem Biophys Res Commun / PubMed:37062240 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.5 - 3.59 Å |
構造データ | EMDB-34686, PDB-8heb: EMDB-34687, PDB-8hec: EMDB-34688, PDB-8hed: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / VIRAL PROTEIN-IMMUNE SYSTEM COMPLEX |