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EMBIO – Cambridge Particle Swarm Optimization applied to Automated Docking Automated docking of a ligand to a macromolecule Particle Swarm Optimization Multi-objective PSO + Clustering Docking experiments Conclusion
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EMBIO – Cambridge Automated Docking Predict binding of a ligand molecule to a receptor macromolecule Minimize resulting binding energy
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EMBIO – Cambridge Energy Evaluation [Morris et al.]
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EMBIO – Cambridge Autodock 3.05 Determine energies using trilinear interpolation on precalculated grid maps Minimize docking energy with various optimization techniques Simulated Annealing Genetic Algorithm with Local Search Sum of energies is minimized
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EMBIO – Cambridge Particle Swarm Optimization Multi-dimensional, numerical optimization by a swarm of particles Each particle has current position, best position and velocity Attracted by personal best position and neighbourhood best position
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EMBIO – Cambridge PSO Algorithm
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EMBIO – Cambridge Clustering Particles are clustered into K separate swarm K-means Clustering m data-vectors are clustered into k clusters Iteratively calculate centroids of each cluster
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EMBIO – Cambridge Multiple Objectives Optimize, simultaneously Find dominating solutions Non-Dominated Front
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EMBIO – Cambridge Clust-MPSO Update personal best position Each swarm has non-dominated front is dominated if no particle is in Dominated swarms are relocated Neighbourhood best particle Picked for several iterations
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EMBIO – Cambridge
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1hvr Docking
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EMBIO – Cambridge 4cha Docking
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EMBIO – Cambridge Convergence – 1hvr
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EMBIO – Cambridge Convergence – 4cha
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EMBIO – Cambridge Conclusions Application of PSO to Automated Docking Optimization of two objectives Clustering to divide the search space
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