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A structure-kinetic relationship study using matched molecular pair analysis.

Doris A Schuetz1, Lars Richter1, Riccardo Martini1

  • 1Department of Pharmaceutical Chemistry, University of Vienna UZA 2, Althanstrasse 14 1090 Vienna Austria gerhard.f.ecker@univie.ac.at.

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This summary is machine-generated.

Drug-target residence time is key for efficacy and safety. This study analyzed 3812 molecules, revealing ligand polarity impacts binding rates but not always residence time, offering strategies for optimization.

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Area of Science:

  • Pharmacology and Drug Discovery
  • Computational Chemistry
  • Biophysics

Background:

  • Drug-target complex lifetime, or residence time, is crucial for therapeutic efficacy and minimizing adverse effects.
  • Optimizing binding kinetics, particularly residence time, is a key goal in modern drug discovery.
  • Understanding structure-kinetic relationships (SKR) can guide the rational design of improved drug candidates.

Purpose of the Study:

  • To investigate the influence of ligand structural properties on drug-target binding kinetics.
  • To analyze large-scale datasets to identify quantitative structure-kinetic relationships (SKR).
  • To provide insights into strategies for modulating drug-target residence time through ligand modification.

Main Methods:

  • Assembled a dataset of 3812 small molecules across 78 targets from 21 publications and the K4DD database.
  • Utilized matched molecular pair (MMP) analysis to explore structure-kinetic relationships.
  • Performed large-scale data analysis to correlate molecular features with kinetic parameters (on-rate, off-rate).

Main Results:

  • Identified a significant impact of ligand polarity on the association rate (on-rate) of drug-target binding.
  • Observed that increased polarity can destabilize both the transition and ground states, potentially negating benefits to residence time.
  • Demonstrated through case studies how ligand modifications can be designed to specifically alter on-rates, off-rates, or both.

Conclusions:

  • Ligand polarity is a critical factor influencing drug-target binding kinetics, particularly the association rate.
  • Simply increasing polarity does not guarantee improved residence time due to potential destabilization effects.
  • Rational ligand design strategies can be employed to fine-tune binding kinetics for enhanced drug efficacy and safety.