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Ligand Binding Sites

Ligand Binding Sites

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.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

Ligand Binding Sites

Ligand Binding Sites

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.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...

Protein-protein Interfaces

Protein-protein Interfaces

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 polypeptide...

Ligand Binding and Linkage

Ligand Binding and Linkage

Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence the...

Ligand Binding and Linkage

Ligand Binding and Linkage

Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence the...

The Equilibrium Binding Constant and Binding Strength

The Equilibrium Binding Constant and Binding Strength

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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Related Experiment Video

Updated: Jun 6, 2026

Protein Target Prediction and Validation of Small Molecule Compound

Protein Target Prediction and Validation of Small Molecule Compound

Published on: February 23, 2024

Advances and challenges in protein-ligand docking.

Sheng-You Huang¹, Xiaoqin Zou

¹Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO 65211, USA;

International Journal of Molecular Sciences

|December 15, 2010

Summary

Molecular docking predicts how molecules bind. This review covers advances in protein-ligand docking, focusing on protein flexibility, ligand sampling, and scoring functions for drug design.

Keywords:

ligand sampling molecular docking protein flexibility protein-ligand interactions scoring functions

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Area of Science:

Computational chemistry
Structural biology
Pharmacology

Background:

Molecular docking is a key computational method for understanding molecular recognition.
Protein-ligand docking is crucial for structure-based drug design, aiding in the development of new therapeutics.

Purpose of the Study:

To review recent advancements in protein-ligand docking.
To highlight progress in protein flexibility, ligand sampling, and scoring functions.

Main Methods:

Review of recent literature on protein-ligand docking methodologies.
Analysis of key components: protein flexibility, ligand sampling, and scoring functions.

Main Results:

Recent advances have improved the accuracy of predicting binding modes and affinities.
Progress in handling protein flexibility and exploring diverse ligand conformations enhances docking reliability.

Conclusions:

Protein-ligand docking continues to evolve with innovations in flexibility, sampling, and scoring.
Future directions include addressing remaining challenges to further enhance drug design applications.