DATABASE ENRICHMENTS OF MAO-B THROUGH ENSEMBLE DOCKING

EMILIO MATEEV; IVA VALKOVA; MAYA GEORGIEVA; ALEXANDER ZLATKOV

doi:10.22159/ijpps.2021v13i8.41956

Authors

EMILIO MATEEV Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University–Sofia
IVA VALKOVA Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University–Sofia
MAYA GEORGIEVA Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University–Sofia
ALEXANDER ZLATKOV Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University–Sofia

DOI:

https://doi.org/10.22159/ijpps.2021v13i8.41956

Keywords:

Molecular docking, MAO-B, Ensemble docking, Enrichment factor

Abstract

Objective: The recent growth of highly resoluted crystallographic structures, together with the continuous improvements of the computing power, has established molecular docking as a leading drug design technique. However, the problems concerning the receptor flexibility and the lowered ability of docking software to correctly score the occurred interactions in some receptors are still relevant.

Methods: Recently, several research groups have reported an enhancement in enrichment values when ensemble docking has been applied. Therefore, we utilized the latest technique for a dataset of Monoamine Oxidase–B (MAO-B) inhibitors. The docking program GOLD 5.3 was used in our study. Several docking parameters (grid space, scoring functions and ligand flexibility) were altered in order to achieve the optimal docking protocol.

Results: The results of 200 000+docking simulations are represented in a modest table. The ensembled simulations demonstrated low ability of the docking software to correctly score the actives seeded in the dataset. However, the superimposed complex-1S3B-1OJA-1OJC, achieved a moderate enrichment value equaled to 9. No significant improvements were noted when five complexed receptors were employed.

Conclusion: As a conclusion, it should be noted that in some cases the ensemble docking enhanced the database enrichments, however overall the value is not suitable for future virtual screening. Further investigations in that area should be considered.

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