Details

Autor(en) / Beteiligte

• Zhu, Xing
• Mannar, Dhiraj
• Srivastava, Shanti S
• Berezuk, Alison M
• Demers, Jean-Philippe
• Saville, James W
• Leopold, Karoline
• Li, Wei
• Dimitrov, Dimiter S
• Tuttle, Katharine S
• Zhou, Steven
• Chittori, Sagar
• Subramaniam, Sriram
• Bhella, David

Titel

Cryo-electron microscopy structures of the N501Y SARS-CoV-2 spike protein in complex with ACE2 and 2 potent neutralizing antibodies

Ist Teil von

• PLoS biology, 2021-04, Vol.19 (4), p.e3001237-e3001237

Ort / Verlag

United States: Public Library of Science

Erscheinungsjahr

2021

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The recently reported "UK variant" (B.1.1.7) of SARS-CoV-2 is thought to be more infectious than previously circulating strains as a result of several changes, including the N501Y mutation. We present a 2.9-Å resolution cryo-electron microscopy (cryo-EM) structure of the complex between the ACE2 receptor and N501Y spike protein ectodomains that shows Y501 inserted into a cavity at the binding interface near Y41 of ACE2. This additional interaction provides a structural explanation for the increased ACE2 affinity of the N501Y mutant, and likely contributes to its increased infectivity. However, this mutation does not result in large structural changes, enabling important neutralization epitopes to be retained in the spike receptor binding domain. We confirmed this through biophysical assays and by determining cryo-EM structures of spike protein ectodomains bound to 2 representative potent neutralizing antibody fragments.