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Thermodynamics and Kinetics in Antibody Resistance of the 501Y.V2 SARS-CoV-2 Variant

revised on 19.04.2021, 05:04 and posted on 19.04.2021, 09:39 by Son Tung Ngo, Trung Hai Nguyen, Duc-Hung Pham, Nguyen Thanh Tung, Pham Cam Nam
Understanding thermodynamics and kinetics of the binding process of antibody to SARS-CoV-2 receptor-binding domain (RBD) of Spike protein is very important for the development of COVID19 vaccines. Especially, it is essential to understand how the binding mechanism may change under the effects of RBD mutations. In this context, we have demonstrated that the South African variant (B1.351 or 501Y.V2) can resist the neutralizing antibody (NAb). Three substitutions in RBD including K417N, E484K, and N501Y alters the free energy landscape, binding pose, binding free energy, binding kinetics, and unbinding pathway of RBD + NAb complexes. The low binding affinity of NAb to 501Y.V2 RBD confirms the antibody resistance of the South African variant.


NAFOSTED with grant number of 104.99-2019.57


Email Address of Submitting Author


Ton Duc Thang University



ORCID For Submitting Author


Declaration of Conflict of Interest

No Conflict of Interest

Version Notes

Version 1.1