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Updated: Jul 7, 2025

Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
Published on: January 16, 2016
Kinetic solubility: Experimental and machine-learning modeling perspectives
Shamkhal Baybekov1, Pierre Llompart1,2, Gilles Marcou1
1Laboratoire de Chémoinformatique UMR 7140 CNRS, Institut Le Bel, University of Strasbourg, 4 Rue Blaise Pascal, 67081, Strasbourg, France.
This study shows that kinetic solubility assays are reproducible and can be modeled. Predictive models for kinetic solubility are essential as it cannot be substituted by thermodynamic solubility in drug discovery.
Area of Science:
- Medicinal Chemistry
- Computational Chemistry
- Drug Discovery
Background:
- Kinetic solubility is crucial for high-throughput screening in early drug discovery.
- Kinetic solubility assays often exhibit low reproducibility due to protocol sensitivity.
- Limited efforts exist in developing Quantitative Structure-Property Relationship (QSPR) models for kinetic solubility compared to thermodynamic solubility.
Purpose of the Study:
- To investigate the reproducibility and modelability of kinetic solubility assays.
- To analyze the relationship between kinetic and thermodynamic solubility.
- To assess the consistency of data across different kinetic solubility assays.
Main Methods:
- Analysis of the correlation between kinetic and thermodynamic solubility data.
- Examination of data consistency from various kinetic solubility assays.
- Development and evaluation of QSPR models for kinetic solubility using merged datasets.
Main Results:
- Observed differences between kinetic and thermodynamic solubility align with existing literature.
- Demonstrated good agreement between data from different kinetic solubility campaigns, contrary to expectations.
- Achieved high-performing QSPR models for kinetic solubility using combined datasets.
- Showcased poor performance of thermodynamic solubility QSPR models on kinetic solubility data, confirming their lack of correlation.
Conclusions:
- Kinetic and thermodynamic solubilities are distinct properties and cannot be used interchangeably.
- Kinetic solubility assays exhibit better reproducibility than commonly assumed.
- The development of predictive QSPR models for kinetic solubility is feasible and encouraged.
- A freely accessible kinetic solubility QSPR model is available via the Predictor web service.
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