Background: Malaria is endemic in various parts of India particularly in the North-
Eastern states with Plasmodium falciparum-the most prevalent human malaria parasite. Plantderived
compounds have always received tremendous importance in the area of drug discovery and
development and scientific study of traditional medicinal plants are of great importance to mankind.
Objective: The present work deals with the computational study of some antimalarial compounds
obtained from a few medicinal plants used by the tribal inhabitants of the North-Eastern region of
India for treating malaria.
Methods: In silico methodologies were performed to study the ligand-receptor interactions. Target
was identified based on the pharmacophore mapping approach. A total of 18 plant-derived compounds
were investigated in order to estimate the binding energies of the compounds with their drug
target through molecular docking using Autodock 4.2. ADMET filtering for determining the pharmacokinetic
properties of the compounds was done using Mobyle@RPBS server. Subsequent
Quantitative-Structure Activity Relationship analysis for bioactivity prediction (IC50) of the compounds
was done using Easy QSAR 1.0.
Results: The docking result identified Salannin to be the most potent Plasmepsin II inhibitor while
the QSAR analysis identified Lupeol to have the least IC50 value. Most of the compounds have
passed the ADME/Tox filtration.
Conclusion: Salannin and Lupeol were found to be the most potent antimalarial compounds that
can act as successful inhibitors against Plasmepsin II of P. falciparum. The compounds Salannin
and Lupeol are found in Azadirachta indica and Swertia chirata plants respectively, abundantly
available in the North-Eastern region of India and used by many inhabiting tribes for the treatment
of malaria and its symptoms.