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10.1002/jev2.12170

http://scihub22266oqcxt.onion/10.1002/jev2.12170
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suck abstract from ncbi


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pmid34874124      J+Extracell+Vesicles 2021 ; 10 (14): e12170
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  • Millisecond dynamic of SARS-CoV-2 spike and its interaction with ACE2 receptor and small extracellular vesicles #MMPMID34874124
  • Lim K; Nishide G; Yoshida T; Watanabe-Nakayama T; Kobayashi A; Hazawa M; Hanayama R; Ando T; Wong RW
  • J Extracell Vesicles 2021[Dec]; 10 (14): e12170 PMID34874124show ga
  • SARS-CoV-2 spike protein (S) binds to human angiotensin-converting enzyme 2 (hACE2), allowing virus to dock on cell membrane follow by viral entry. Here, we use high-speed atomic force microscopy (HS-AFM) for real-time visualization of S, and its interaction with hACE2 and small extracellular vesicles (sEVs). Results show conformational heterogeneity of S, flexibility of S stalk and receptor-binding domain (RBD), and pH/temperature-induced conformational change of S. S in an S-ACE2 complex appears as an all-RBD up conformation. The complex acquires a distinct topology upon acidification. S and S2 subunit demonstrate different membrane docking mechanisms on sEVs. S-hACE2 interaction facilitates S to dock on sEVs, implying the feasibility of ACE2-expressing sEVs for viral neutralization. In contrary, S2 subunit docks on lipid layer and enters sEV using its fusion peptide, mimicking the viral entry scenario. Altogether, our study provides a platform that is suitable for real-time visualization of various entry inhibitors, neutralizing antibodies, and sEV-based decoy in blocking viral entry. Teaser: Comprehensive observation of SARS-CoV-2 spike and its interaction with receptor ACE2 and sEV-based decoy in real time using HS-AFM.
  • |Angiotensin-Converting Enzyme 2/chemistry/*metabolism[MESH]
  • |Extracellular Vesicles/*metabolism[MESH]
  • |Humans[MESH]
  • |Hydrogen-Ion Concentration[MESH]
  • |Lipid Bilayers/metabolism[MESH]
  • |Microscopy, Atomic Force[MESH]
  • |Protein Binding[MESH]
  • |Protein Conformation[MESH]
  • |Protein Domains[MESH]
  • |Protein Subunits[MESH]
  • |SARS-CoV-2/drug effects/physiology[MESH]
  • |Spike Glycoprotein, Coronavirus/chemistry/*metabolism[MESH]
  • |Temperature[MESH]


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