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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...

Cooperative Allosteric Transitions

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...

Cooperative Allosteric Transitions

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...

Conserved Binding Sites

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses 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 9, 2026

Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry

Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry

Published on: October 15, 2018

Protein dynamics and ligand migration interplay as studied by computer simulation.

Pau Arroyo-Mañez¹, Damián E Bikiel, Leonardo Boechi

¹Departamento de Química Inorgánica, Analítica y Química-Física (INQUIMAE-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina.

Biochimica Et Biophysica Acta

|August 28, 2010

Summary

This summary is machine-generated.

This study explores protein dynamics and ligand migration using atomistic simulations. It reviews sampling schemes and applies them to diverse proteins, revealing insights into function and pathways.

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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry

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Area of Science:

Biophysics
Computational Biology
Structural Biology

Background:

Proteins are dynamic molecules essential for biological functions.
Understanding protein dynamics is crucial for deciphering their mechanisms.
Ligand migration within proteins influences their activity.

Purpose of the Study:

To investigate the relationship between protein dynamics and ligand migration.
To review and apply computational sampling schemes for studying ligand migration pathways and thermodynamics.
To analyze ligand migration in various protein systems.

Main Methods:

Classical mechanical atomistic simulations.
Review of different sampling schemes for molecular dynamics.
Application of simulation methods to myoglobin, neuroglobin, truncated hemoglobins, nitrophorins, catalase, hydrogenase, P450, and haloalkane dehalogenase.

Main Results:

Identification of ligand migration pathways, tunnels, and cavities in various proteins.
Analysis of ligand escape and conformational changes in nitrophorins.
Investigation of ligand selectivity in enzymes like catalase and hydrogenase.
Examination of larger ligand migration in P450 and haloalkane dehalogenase systems.

Conclusions:

Atomistic simulations effectively reveal the connection between protein dynamics and ligand migration.
The reviewed sampling schemes provide valuable thermodynamic and pathway information.
Understanding ligand migration dynamics is key to protein function across diverse families.