acellera labs & computational science lab at: d3r grand …€¦ · (10) the wyrm -verb......
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D3R Grand Challenge 4: How we did it.
Alejandro Varela Rial, Industrial PhD student at:
Acellera Labs & Computational Science Lab
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Pose prediction challenge: Exploiting structural knowledge
Search for homologs (BLAST)
SkeleDock (MCS like)
Optional refinement (MD/rDock)
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SkeleDock: How does it work?
Graph comparison:Template VS query molecule
Autocompletion step
Tethering
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MD refinement step: Double purpose
SkeleDock
Minimization
Equilibration (3 ns)
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Pose prediction: results
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Affinity prediction challenges: SkeleDock & KDeep
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Affinity prediction results
Free EnergyPrediction (n=34)
Ligand Scoring (n=154)
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log P challenge, by Boris Sattarov
● EPI Kow dataset (from EPA’s OPERA toolkit)
● After filtering, training set size was 12,746 compounds
● Features: (ECFP4 + Avalon1024 + MACCS keys), and 199 RDKit (MolWt, Chi’s, ...)
● Extreme gradient boosting trees-based method
● 2nd out of 90 others in mean RMSE (0.39) and achieved mean 0.74 R2
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Usual problems:
● Converting between formats
● Assigning charges and partial charges
● Chemistry (in general)
● Manual supervision
● How to systematically use previous affinity knowledge
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PlayMolecule: A repository of molecular applications
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Thanks!
● To the D3R organizers
● To my colleagues at Acellera and the Computational Science Lab
● And… To this audience!