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This study by Jeremy Horst and Ram Samudrala from the University of Washington discusses the Consensus RAPDF rTAD refinement process, highlighting both its successes and failures in predicting interatomic distances and modeling structures. The results demonstrate improvements in metrics like RMSD and GDT-TS across various targets, showcasing the method’s effectiveness against competitors. Insights into side chain packing, loop search strategies, and the importance of addressing challenging targets are presented, alongside recommendations for future benchmarks and methodologies. The work emphasizes the need for more innovative approaches in atomic movement and functional site refinement.
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Consensus RAPDF rTAD RefinementSuccesses & Failures Jeremy Horst Ram Samudrala’sCompBio Group University of Washington
Consensus RAPDF rTAD Refinement Derive interatomic distances Bayesian probabilities Distance bin Nonredundant structure set Atom type Atom type J.Horst & R.Samudrala
Consensus RAPDF rTAD Refinement - RESULTS TR488 TR464 2.111.46 aRMSD0.870.91 GDT-TS 2.943.51 aaRMSD0.610.68 GDT-TS J.Horst & R.Samudrala
Consensus RAPDF rTAD Refinement – SIDE CHAIN PACKING J.Horst & R.Samudrala
CASP8R Perks + no focus on specific regions; automated + never much worse (454) CASP8 FM targets Perks + absolute best on 5/96targets (407,409,414,455,510) + always better than 2ndbest initial model (on ~all servers)
Needs - Larger loop search space (looser/less constraints) - De-constrain problem areas (Seq vs. Str entropy) - Functional sites (?functional refinement target?) Advice Benchmark on past CASPs (in papers) Do not avoid hard targets (show limits) Expensive methods should be iteratable Combine Methods • Focus physics based methods here. • We need a new way to move atoms (according to Nicolay Grishin) • Are heuristics and regression / SVM okay?
Acknowledgements Folks who wrote code • Ram Samudrala • Tianyun Liu • Charles Mader • Ling-Hong Hung Idea bouncers ++ • Michal Guerquin • Brady Bernard • WeerayuthKittichotirat • Stewart Moughon