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Published on: August 16, 2018
Assessing probe reliability: Functional group-specific biases revealed by interactome-wide docking of general
Dai-Bei Yang1,2, Xiangyu Chen1,2, E Railey White3
1Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104.
Summary
General anesthetics
Area of Science:
- Neuroscience
- Pharmacology
- Computational Biology
Background:
- General anesthetics induce reversible unconsciousness, but their molecular targets and mechanisms are not fully understood.
- Anesthetic-protein interactions are structurally selective despite low binding affinities.
- Chemically modified probes are used to identify anesthetic targets, but modification-induced biases are unknown.
Purpose of the Study:
- To computationally characterize anesthetic-protein interactions at an interactome scale.
- To investigate how chemical modifications of anesthetic ligands introduce biases in target identification.
- To provide mechanistic insights into anesthetic binding and guide drug design.
Main Methods:
- High-throughput molecular docking of anesthetic ligands (propofol, etomidate, and analogs) against 2,388 mouse neuronal protein structures.
- Comparison of docking results between parent and modified ligands to identify functional group-specific biases.
- Analysis of binding poses, energies, and 3D spatial distribution functions to visualize interaction hotspots.
Main Results:
- Identified how specific functional group modifications alter anesthetic ligand engagement with protein environments.
- Quantified how small chemical modifications reshape anesthetic-protein interaction profiles.
- Exposed conserved and variable elements of anesthetic recognition across the neuronal interactome.
Conclusions:
- Developed a computational approach to map anesthetic-protein interactions and their biases.
- Demonstrated that chemical modifications can significantly alter observed binding patterns.
- Provided a statistical and structural framework for understanding anesthetic binding and improving probe/drug design.
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