Abstract
Background: Studies on the interaction between bioactive molecules and HIV-1 virus have been the focus of recent research in the scope of medicinal chemistry and pharmacology.
Objective: Investigating the structural parameters and physico-chemical properties of elucidating and identifying the antiviral pharmacophore sites.
Methods: A mixed computational Petra/Osiris/Molinspiration/DFT (POM/DFT) based model has been developed for the identification of physico-chemical parameters governing the bioactivity of 22 3-hydroxy-indolin-2-one derivatives of diacetyl-L-tartaric acid and aromatic amines containing combined antiviral/antitumor/antibacterial pharmacophore sites. Molecular docking study was carried out with HIV-1 integrase (pdb ID: 5KGX) in order to provide information about interactions in the binding site of the enzyme.
Results: The POM analyses of physico-chemical properties and geometrical parameters of compounds 3a-5j, show that they are bearing a two combined (O,O)-pockets leading to a special platform which is able to coordinate two transition metals. The increased activity of series 3a-5j, as compared to standard drugs, contains (Osp2,O sp3,O sp2)-pharmacophore site. The increase in bioactivity from 4b (R1, R2 = H, H) to 3d (R1, R2 = 4-Br, 2-OCH3) could be attributed to the existence of π-charge transfer from para-bromo-phenyl to its amid group (COδ---NHδ+). Similar to the indole-based reference ligand (pdb: 7SK), compound 3d forms hydrogen bonding interactions between the residues Glu170, Thr174 and His171 of HIV-1 integrase in the catalytic core domain of the enzyme.
Conclusion: Study confirmed the importance of oxygen atoms, especially from the methoxy group of the phenyl ring, and electrophilic amide nitrogen atom for the formation of interactions.
Keywords: 3-Hydroxy-indolin-2-ones, POM analyses, HIV antiviral activity, pharmacophore, molecular docking, HIV-1 integrase.
Graphical Abstract
[http://dx.doi.org/10.1001/jama.1994.03520060037029] [PMID: 7913730]
[http://dx.doi.org/10.1097/QAI.0000000000001660] [PMID: 29474268]
[http://dx.doi.org/10.1016/j.bioorg.2018.04.027] [PMID: 29775947]
[http://dx.doi.org/10.1021/bi9907173] [PMID: 10413462]
[http://dx.doi.org/10.1016/j.febslet.2010.03.016] [PMID: 20227411]
[http://dx.doi.org/10.1016/j.bmcl.2016.08.037] [PMID: 27568085]
[http://dx.doi.org/10.1007/s11164-016-2578-8]
[http://dx.doi.org/10.2174/1573407211666151012191902]
[http://dx.doi.org/10.1007/s11094-016-1417-y]
[http://dx.doi.org/10.17344/acsi.2015.1357] [PMID: 26454603]
[http://dx.doi.org/10.1016/j.biopha.2017.06.015] [PMID: 28623784]
[http://dx.doi.org/10.3390/molecules21020222] [PMID: 26901173]
[http://dx.doi.org/10.1007/s008940050128]
[http://dx.doi.org/10.1007/s00894-004-0183-z] [PMID: 14997367]
[http://dx.doi.org/10.1186/1471-2105-12-S1-S33] [PMID: 21342564]
[http://dx.doi.org/10.1038/nchembio.370] [PMID: 20473303]
[http://dx.doi.org/10.1074/jbc.M112.443390] [PMID: 23615903]
[http://dx.doi.org/10.1186/s12977-014-0100-1] [PMID: 25421939]