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Ligand Binding Sites02:40

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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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Exploring Protein-Glycan Interactions: Advances in Nuclear Magnetic Resonance
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Underappreciated Chemical Interactions in Protein-Ligand Complexes.

Andrew Anighoro1

  • 1Evotec (UK) Ltd., Oxfordshire, UK. andrew.anighoro@evotec.com.

Methods in Molecular Biology (Clifton, N.J.)
|February 5, 2020
PubMed
Summary

Medicinal chemistry often overlooks crucial non-covalent interactions in drug design. Exploring these underappreciated forces can significantly enhance drug potency and guide structure-based drug design strategies.

Keywords:
Cation–πDrug designHalogen bondHalogen–πHydrophobic interactionsMedicinal chemistryNon-classical hydrogen bondNon-covalent interactionsOrthogonal multipolar interactionsQuantum mechanicsπ–π stacking

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Area of Science:

  • * Medicinal Chemistry and Computational Drug Design

Background:

  • * Non-covalent interactions are fundamental to molecular recognition and drug-target binding.
  • * Traditional focus in medicinal chemistry is on hydrophobic contacts, hydrogen bonds, salt bridges, and aromatic stacking interactions.
  • * Underappreciated non-covalent interactions significantly stabilize protein-ligand complexes, impacting drug efficacy.

Purpose of the Study:

  • * To highlight selected underappreciated non-covalent interactions in protein-ligand complexes.
  • * To discuss the impact of these interactions on drug design strategies.
  • * To provide examples of how understanding these interactions can improve lead compound potency.

Main Methods:

  • * Review of scientific literature on protein-ligand interactions.
  • * Analysis of computational studies on non-covalent interactions.
  • * Case studies illustrating the role of specific non-covalent interactions in drug design.

Main Results:

  • * Identification of various non-covalent interactions beyond the commonly studied ones.
  • * Demonstration of the significant contribution of these interactions to binding affinity and stability.
  • * Examples showing how targeting these interactions can lead to improved drug candidates.

Conclusions:

  • * A broader consideration of non-covalent interactions is essential for effective drug design.
  • * Computational analysis of diverse non-covalent interactions aids in understanding structure-activity relationships (SAR).
  • * Recognizing and leveraging underappreciated interactions can optimize drug potency and guide future medicinal chemistry efforts.