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This article is part of the supplement: 3rd German Conference on Chemoinformatics: 21. CIC-Workshop

Poster presentation

Multi-body interactions in molecular docking: treatment of water molecules and multiple ligands

Oliver Korb, T Stützle and TE Exner

Theoretische Chemische Dynamik, Fachbereich Chemie, Universität Konstanz, D-78457 Konstanz, Germany

corresponding author email

from 3rd German Conference on Chemoinformatics
Goslar, Germany. 11-13 November 2007

Chemistry Central Journal 2008, 2(Suppl 1):P5doi:10.1186/1752-153X-2-S1-P5

The electronic version of this abstract is the complete one and can be found online at: http://www.journal.chemistrycentral.com/content/2/S1/P5

Published:

26 March 2008

© 2008 Korb et al.

Poster presentation

In the last years, the importance of water molecules in pose prediction experiments has been widely recognized and several approaches to integrate water molecules into the docking process have been proposed [1,2]. The inclusion of water molecules extends the classical two-body problem of docking a flexible ligand into a protein receptor to a multi-body docking problem as protein-ligand, protein-water, water-ligand and water-water interactions need to be taken into account. Our Ant Colony Optimization [4] based protein-ligand docking algorithm PLANTS [3] has been extended by a general multi-body docking kernel, which is able to handle interactions arising between several molecules. This kernel allows us, on the one hand, to include essential water molecules located in the binding site into docking experiments and, on the other hand, also to score interactions between multiple ligands that are docked concurrently into the binding site. Water molecules are modeled as rigid bodies that are allowed to move and rotate inside a predefined spherical domain making it possible to adapt to structural deviations in cross-docking experiments. Additionally, water molecules can be displaced by ligands or flexible protein side-chains. All ligands considered in the docking experiment are treated fully flexible.

We present the water model parameterization carried out on a set of benchmark complexes and show some preliminary results for docking multiple ligands concurrently.

References

1. Verdonk ML, Chessari G, Cole JC, Hartshorn MJ, Murray C, Nissink JWM, Taylor RD, Taylor R: Modeling Water Molecules in Protein-Ligand Docking Using GOLD.

   J Med Chem 2005, 48(20):6504-6515. PubMed Abstract | Publisher Full Text

2. Rarey M, Kramer B, Lengauer T: The particle concept: Placing discrete water molecules during protein-ligand docking predictions.

   PROTEINS: Structure, Functions, and Genetics 1999, 34:17-24. Publisher Full Text

3. Korb O, Stützle T, Exner TE: PLANTS: Application of Ant Colony Optimization to Structure-Based Drug Design.

   LNCS 2006, 4150:247-258.

4. Dorigo M, Stützle T: Ant Colony Optimization.

   MIT Press 2004.

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