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2021 ; 39
(11
): 3842-3854
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Withanone and caffeic acid phenethyl ester are predicted to interact with main
protease (M(pro)) of SARS-CoV-2 and inhibit its activity
#MMPMID32431217
Kumar V
; Dhanjal JK
; Kaul SC
; Wadhwa R
; Sundar D
J Biomol Struct Dyn
2021[Jul]; 39
(11
): 3842-3854
PMID32431217
show ga
The recent novel coronavirus, Severe Acute Respiratory Syndrome Coronavirus 2
(SARS-CoV-2/2019-nCoV) has caused a large number of deaths around the globe.
There is an urgent need to understand this new virus and develop prophylactic and
therapeutic drugs. Since drug development is an expensive, intense and
time-consuming path, timely repurposing of the existing drugs is often explored
wherein the research avenues including genomics, bioinformatics, molecular
modeling approaches offer valuable strengths. Here, we have examined the binding
potential of Withaferin-A (Wi-A), Withanone (Wi-N) (active withanolides of
Ashwagandha) and Caffeic Acid Phenethyl Ester (CAPE, bioactive ingredient of
propolis) to a highly conserved protein, M(pro) of SARS-CoV-2. We found that Wi-N
and CAPE, but not Wi-A, bind to the substrate-binding pocket of SARS-CoV-2 M(pro)
with efficacy and binding energies equivalent to an already claimed N3 protease
inhibitor. Similar to N3 inhibitor, Wi-N and CAPE were interacting with the
highly conserved residues of the proteases of coronaviruses. The binding
stability of these molecules was further analyzed using molecular dynamics
simulations. The binding free energies calculated using MM/GBSA for N3 inhibitor,
CAPE and Wi-N were also comparable. Data presented here predicted that these
natural compounds may possess the potential to inhibit the functional activity of
SARS-CoV-2 protease (an essential protein for virus survival), and hence (i) may
connect to save time and cost required for designing/development, and initial
screening for anti-COVID drugs, (ii) may offer some therapeutic value for the
management of novel fatal coronavirus disease, (iii) warrants prioritized further
validation in the laboratory and clinical tests.Communicated by Ramaswamy H.
Sarma.