In silico screening of W. salutaris bioactive constituents reveal betulinic acid, ursolic acid acetate and eucosterol as potential M. tuberculosis antagonists targeting FabF

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Abstract Tuberculosis (TB) remains a long-standing burdening disease to control worldwide. The lengthy current TB treatment, which boasts with unbearable adverse effects, and frequent emergence of drug resistant strains of M. tuberculosis lays an increasing burden. This behests urgent discovery and development of alternative novel medicine to alleviate TB. In this report, in silico methods were applied to examine the propensity of W. salutaris active compounds as potential inhibitors of M. tuberculosis fatty acid biosynthesis protein (FabF). Thirteen compounds were virtually screened against FabF and subjected to molecular dynamics simulations and post-dynamics analyses to examine their inhibitory potential. Betulinic acid, ursolic acid and ursolic acid acetate had the best binding energies and hence the best inhibitory potential against FabF and desirable cytotoxicity profile. These compounds bind and interact with FabF active site residues to exert their inhibitory potential. Findings in this preliminary report warrant further experimental validation towards the development of these compounds as potential drugs targeting FabF in the treatment of tuberculosis.

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