Related Experiment Video
Updated: Jan 13, 2026
08:31
Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions
Published on: December 1, 2020
5.5K
How to efficiently characterize the interaction pathways of protein-ligand recognition? A comparative analysis on
Zhiliang Jiang1, Mingyun Shen2, Zhe Wang3,4
1Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, Jiangsu, People's Republic of China.
The Journal of Chemical Physics
|January 9, 2026
Summary
Comparing enhanced sampling methods, random acceleration molecular dynamics (RAMD) offers a faster approach for exploring drug-target dissociation pathways, especially when protein stability is maintained. Well-tempered metadynamics is recommended when protein stability is a concern.
Area of Science:
- Computational Chemistry
- Molecular Dynamics
- Drug Discovery
Background:
- Drug candidates often fail in experiments despite favorable binding pocket interactions.
- Drug-target recognition dynamics are crucial but challenging to characterize.
- Existing enhanced sampling simulations lack systematic investigation of optimal settings.
Purpose of the Study:
- To systematically compare well-tempered metadynamics (MetaD) and random acceleration molecular dynamics (RAMD) for characterizing protein-ligand dissociation.
- To investigate optimal simulation strategies for efficient drug-target interaction pathway analysis.
- To evaluate these methods on both pathway-obvious (kinase) and pathway-unobvious (nuclear receptor) systems.
Main Methods:
- Comparative analysis of MetaD and RAMD simulations.
- Utilized two target families: kinase (TRK1) and nuclear receptor (THRβ).
- Assessed protein structure stability, drug residence time, and interaction pathway consistency.
Main Results:
- MetaD and RAMD (with high force) maintain protein structure stability.
- Both methods correlate residence time with experimental binding strength; RAMD is faster.
- Consistent interaction pathway preferences were observed for both methods across target families.
Conclusions:
- RAMD with high random force is time-efficient for exploring dissociation pathways if protein stability is ensured.
- MetaD with high bias factor is a suitable alternative balancing accuracy and efficiency when protein stability is compromised.
- These findings guide the selection of enhanced sampling techniques for drug-target interaction studies.
More Related Videos
Related Concept Videos
02:04Protein-protein Interfaces
14.4K
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...
14.4K
02:40Ligand Binding Sites
14.9K
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-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...
14.9K
02:26Protein Networks
4.5K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
4.5K
01:49Conserved Binding Sites
5.0K
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...
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...
5.0K
01:22Protein-Drug Binding: Determination Methods
611
Determining protein-drug binding can be achieved through indirect and direct methods, each providing valuable insights into the interaction between proteins and drugs.
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
Indirect methods involve isolating the bound drug from its free form in biological samples such as blood, serum, or plasma. These techniques aim to measure the percentage of drugs bound to proteins. Equilibrium dialysis is a commonly used method where the free drug concentration at equilibrium is measured by separating the bound...
611
02:18The Equilibrium Binding Constant and Binding Strength
14.8K
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:
14.8K