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In silico  studies are attracting considerable interest due to their ability to understand protein–ligand interactions at the atomic level. The main principal tools of this  in silico  analyses are molecular docking and molecular dynamic (MD) simulation. This paper examines how can natural compounds that are derived from  Salviae miltiorrhizae  to block Neisseria adhesion A Regulatory protein (NadR). In molecular docking analysis, only four compounds were found in higher binding affinity with NadR among 10 candidates (tanshinol B, tanshinol A, lithospermic acid and tournefolal were −7.61, −7.56, −8.22 and −7.81 kcal/mol, respectively, compared to −7.23 kcal/mol of native ligand). Absorption, distribution, metabolism, excretion (ADME) and toxicity properties, medicinal chemistry profile, and physicochemical features were displayed that tournefolal contains good properties to work as a safe and good anti-adhesive drug. Therefore, the complexes of these four ligands with NadR protein were subjected to 100 ns of MD simulation. RMSD, RMSF, RG and hydrogen bonding exhibited that tournefolal showed stable binding affinity and molecular interaction with NadR protein. In light of these results, there is now a need to conduct much more  in vitro  and  in vivo  studies about the efficacy of tournefolal. Communicated by Ramaswamy H. Sarma

Computer-based identification of potential compounds from Salviae miltiorrhizae against Neirisaral adhesion A regulatory protein