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10.1016/j.bpj.2020.10.036

http://scihub22266oqcxt.onion/10.1016/j.bpj.2020.10.036
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33189680!7661960!33189680
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suck abstract from ncbi


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pmid33189680      Biophys+J 2021 ; 120 (6): 1072-1084
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  • The flexibility of ACE2 in the context of SARS-CoV-2 infection #MMPMID33189680
  • Barros EP; Casalino L; Gaieb Z; Dommer AC; Wang Y; Fallon L; Raguette L; Belfon K; Simmerling C; Amaro RE
  • Biophys J 2021[Mar]; 120 (6): 1072-1084 PMID33189680show ga
  • The coronavirus disease 2019 (COVID-19) pandemic has swept over the world in the past months, causing significant loss of life and consequences to human health. Although numerous drug and vaccine development efforts are underway, there are many outstanding questions on the mechanism of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) viral association to angiotensin-converting enzyme 2 (ACE2), its main host receptor, and host cell entry. Structural and biophysical studies indicate some degree of flexibility in the viral extracellular spike glycoprotein and at the receptor-binding domain (RBD)-receptor interface, suggesting a role in infection. Here, we perform explicitly solvated, all-atom, molecular dynamics simulations of the glycosylated, full-length, membrane-bound ACE2 receptor in both an apo and spike RBD-bound state to probe the intrinsic dynamics of the ACE2 receptor in the context of the cell surface. A large degree of fluctuation in the full-length structure is observed, indicating hinge bending motions at the linker region connecting the head to the transmembrane helix while still not disrupting the ACE2 homodimer or ACE2-RBD interfaces. This flexibility translates into an ensemble of ACE2 homodimer conformations that could sterically accommodate binding of the spike trimer to more than one ACE2 homodimer and suggests a mechanical contribution of the host receptor toward the large spike conformational changes required for cell fusion. This work presents further structural and functional insights into the role of ACE2 in viral infection that can potentially be exploited for the rational design of effective SARS-CoV-2 therapeutics.
  • |Angiotensin-Converting Enzyme 2/chemistry/*metabolism[MESH]
  • |COVID-19/*enzymology/*virology[MESH]
  • |Humans[MESH]
  • |Molecular Dynamics Simulation[MESH]
  • |Protein Multimerization[MESH]


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