id author title date pages extension mime words sentences flesch summary cache txt cord-274280-x5s4l0pp Yang, Jinsung Molecular interaction and inhibition of SARS-CoV-2 binding to the ACE2 receptor 2020-09-11 .txt text/plain 7278 403 56 Here, we analyze the biophysical properties of the SARS-CoV-2 S-glycoprotein binding, on model surfaces and on living cells, to ACE2 receptors using force-distance (FD) curve-based atomic force microscopy (FD-curve-based AFM) (Fig. 1c) . used FD-curve-based AFM to evaluate at the single-molecule level the binding strength of the interaction established between the glycosylated S1 subunit and ACE2 receptors on model surfaces (Fig. 2a) . To investigate the properties of the binding complex, force-distance (FD) curves were recorded by repeatedly approaching and withdrawing the S1 subunit or RBD-functionalized tip from the ACE2 model surface (Fig. 2a, b) . To this end, we synthetized four different peptides (sequences provided in Supplementary Fig. 9 ), which have been selected to mimic the regions of ACE2 that interact with the S1 subunit as determined by the crystal structure 29 , and we tested their binding inhibition properties using our single-molecule force spectroscopy approach (Fig. 4a, b) . ./cache/cord-274280-x5s4l0pp.txt ./txt/cord-274280-x5s4l0pp.txt