Article ; Online: hACE2-Induced Allosteric Activation in SARS-CoV versus SARS-CoV-2 Spike Assemblies Revealed by Structural Dynamics.
ACS infectious diseases
2023 Volume 9, Issue 6, Page(s) 1180–1189
Abstract: SARS-CoV and SARS-CoV-2 cell entry begins when spike glycoprotein (S) docks with the human ACE2 (hACE2) receptor. While the two coronaviruses share a common receptor and architecture of S, they exhibit differences in interactions with hACE2 as well as ... ...
Abstract | SARS-CoV and SARS-CoV-2 cell entry begins when spike glycoprotein (S) docks with the human ACE2 (hACE2) receptor. While the two coronaviruses share a common receptor and architecture of S, they exhibit differences in interactions with hACE2 as well as differences in proteolytic processing of S that trigger the fusion machine. Understanding how those differences impact S activation is key to understand its function and viral pathogenesis. Here, we investigate hACE2-induced activation in SARS-CoV and SARS-CoV-2 S using hydrogen/deuterium-exchange mass spectrometry (HDX-MS). HDX-MS revealed differences in dynamics in unbound S, including open/closed conformational switching and D614G-induced S stability. Upon hACE2 binding, notable differences in transduction of allosteric changes were observed extending from the receptor binding domain to regions proximal to proteolytic cleavage sites and the fusion peptide. Furthermore, we report that dimeric hACE2, the native oligomeric form of the receptor, does not lead to any more pronounced structural effect in S compared to saturated monomeric hACE2 binding. These experiments provide mechanistic insights into receptor-induced activation of |
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MeSH term(s) | Humans ; SARS-CoV-2/metabolism ; COVID-19 ; Angiotensin-Converting Enzyme 2/metabolism ; Allosteric Regulation ; Receptors, Virus/metabolism ; Severe acute respiratory syndrome-related coronavirus ; Spike Glycoprotein, Coronavirus/chemistry |
Chemical Substances | Angiotensin-Converting Enzyme 2 (EC 3.4.17.23) ; Receptors, Virus ; Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2 |
Language | English |
Publishing date | 2023-05-11 |
Publishing country | United States |
Document type | Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't |
ISSN | 2373-8227 |
ISSN (online) | 2373-8227 |
DOI | 10.1021/acsinfecdis.3c00010 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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