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Related Concept Videos

Ligand Binding Sites02:40

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 Sites02:40

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...
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
The Equilibrium Binding Constant and Binding Strength02:18

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:
The Equilibrium Binding Constant and Binding Strength02:18

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:
Ligand Binding and Linkage00:49

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...

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Related Experiment Video

Updated: Jun 26, 2026

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach
10:01

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach

Published on: June 23, 2026

Ligand-binding interactions and stability.

John W Shriver1, Stephen P Edmondson

  • 1Department of Chemistry and Biological Sciences, University of Alabama in Huntsville, Huntsville, AL, USA.

Methods in Molecular Biology (Clifton, N.J.)
|January 23, 2009
PubMed
Summary
This summary is machine-generated.

Understanding ligand binding to macromolecules requires measuring affinity and stoichiometry, considering linked reactions like protonation and folding. This study emphasizes defining binding and linkage effects on stability using spectroscopic and calorimetric data.

Related Experiment Videos

Last Updated: Jun 26, 2026

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach
10:01

Structure-Guided Design and Development of Novel Cyclophilin A Inhibitors and Ganoderiol-F Derivatives: An In-Silico Approach

Published on: June 23, 2026

Area of Science:

  • Biochemistry and molecular biology
  • Chemical thermodynamics

Background:

  • Ligand binding to biological macromolecules is central to biochemical processes.
  • Binding events are often coupled with other reactions, influencing overall molecular behavior.

Purpose of the Study:

  • To define ligand binding and the impact of linked reactions on binding affinity and stability.
  • To highlight the necessity of considering coupled reactions for a comprehensive understanding of binding.

Main Methods:

  • Utilizing spectroscopic techniques to analyze binding interactions.
  • Employing calorimetric methods to quantify binding thermodynamics and linked processes.

Main Results:

  • Demonstrated that binding affinity and stability are significantly influenced by coupled reactions.
  • Provided a framework for analyzing complex binding scenarios.

Conclusions:

  • A thorough understanding of ligand-macromolecule interactions necessitates quantifying affinity, stoichiometry, and linked reaction contributions.
  • Spectroscopic and calorimetric data are crucial for elucidating the influence of linkage on binding and stability.