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Journal of Computer-Aided Molecular Design

, Volume 19, Issue 4, pp 213–228 | Cite as

In-silico Screening using Flexible Ligand Binding Pockets: A Molecular Dynamics-based Approach

  • Dakshanamurthy Sivanesan
  • Rajendram V Rajnarayanan
  • Jason Doherty
  • Nagarajan PattabiramanEmail author
Article

Summary

In-silico screening of flexible ligands against flexible ligand binding pockets (LBP) is an emerging approach in structure-based drug discovery. Here, we describe a molecular dynamics (MD) based docking approach to investigate the influence on the high-throughput in-silico screening of small molecules against flexible ligand binding pockets. In our approach, an ensemble of 51 energetically favorable structures of the LBP of human estrogen receptor α (hERα) were collected from 3 ns MD simulations. In-silico screening of 3500 endocrine disrupting compounds against these flexible ligand binding pockets resulted in thousands of ER–ligand complexes of which 582 compounds were unique. Detailed analysis of MD generated structures showed that only 17 of the LBP residues significantly contribute to the overall binding pocket flexibility. Using the flexible LBP conformations generated, we have identified 32 compounds that bind better to the flexible ligand-binding pockets compared to the crystal structure. These compounds, though chemically divergent, are structurally similar to the natural hormone. Our MD-based approach in conjunction with grid–based distributed computing could be applied routinely for in-silico screening of large databases against any given target.

Keywords

docking endocrine disrupting chemicals estrogen receptor in-silico screening molecular dynamics receptor conformation receptor flexibility 

Abbreviations

MDGS

molecular dynamics generated structures

ER

estrogen receptor

EDC

endocrine disrupting chemicals

LBP

ligand binding pocket

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Copyright information

© Springer 2005

Authors and Affiliations

  • Dakshanamurthy Sivanesan
    • 1
  • Rajendram V Rajnarayanan
    • 1
  • Jason Doherty
    • 1
    • 3
  • Nagarajan Pattabiraman
    • 1
    • 2
    Email author
  1. 1.Department of Oncology, Lombardi Comprehensive Cancer CenterGeorgetown UniversityWashingtonUSA
  2. 2.Department of Biochemistry and Molecular Biology, Lombardi Comprehensive Cancer CenterGeorgetown UniversityNWUSA
  3. 3.Department of PathologyWashington University in St. LouisSt. LouisUSA

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