Related Experiment Video
Updated: Jan 28, 2026
05:50
Pharmacophore Modeling for Targets with Extensive Ligand Libraries: A Case Study on SARS-CoV-2 Mpro
Published on: September 26, 2025
1.5K
Conservation and Relevance of Pharmacophore Point Types.
Tobias Fehlmann1, Michael C Hutter1
1Center for Bioinformatics , Saarland University , Campus E2.1 , 66123 Saarbruecken , Germany.
Journal of Chemical Information and Modeling
|February 27, 2019
Summary
Pharmacophore models can be flexible. This study shows that certain features, like negative ionizable groups, are highly conserved, while others can be interchanged, offering insights into drug design.
Area of Science:
- Computational chemistry and cheminformatics
- Molecular modeling and drug discovery
- Structure-based drug design
Background:
- Pharmacophore models represent key chemical features of ligands.
- Traditionally, pharmacophore features require strict one-to-one matching.
- The justification for this stringent matching needs statistical validation.
Purpose of the Study:
- To statistically analyze the interchangeability and conservation of pharmacophore features.
- To identify the most relevant and potentially obsolete pharmacophore features.
- To investigate the influence of target class on feature conservation.
Main Methods:
- Statistical analysis of 581 unique ligands from BindingDB with known binding pocket orientations.
- Assessment of feature conservation and likelihood of exchanges between different pharmacophore feature types.
- Derivation of feature relevance rankings using different schemes (mutual information, geometric series).
Main Results:
- Negative ionizable features (acids) are the most conserved, followed by hydrogen-bond donors and positive ionizable features (basic nitrogens).
- Most likely exchanges occur between carboxylates and hydrogen-bond acceptors, and between basic nitrogens and hydrogen-bond donors.
- Target type did not significantly impact feature conservation; ranking schemes influenced feature relevance, with hydrophobic features ranked low by mutual information.
Conclusions:
- The one-to-one matching of pharmacophore features may not always be justified, suggesting flexibility in model development.
- Understanding feature interchangeability and conservation aids in refining pharmacophore modeling for drug discovery.
- Negative ionizable features are consistently significant across different ranking methods.
Related Concept Videos
01:57What is Conservation Biology?
24.3K
Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
24.3K
02:04Conservation of Small Populations
17.1K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
17.1K
01:49Conserved Binding Sites
5.1K
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...
5.1K
02:26Conservation of Protein Domains Over Different Proteins
14.4K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.4K
01:17Non-conservative Forces
9.8K
Non-conservative forces are dissipative forces such as friction or air resistance. These forces take energy away from a system as it progresses. Unlike conservative forces, non-conservative forces do not have potential energy associated with them. This is because the energy is lost to the system and cannot be turned into useful work later.
Also unlike their conservative counterparts, they are path-dependent; where the object starts and stops does matter. For example, a grinding wheel applies a...
Also unlike their conservative counterparts, they are path-dependent; where the object starts and stops does matter. For example, a grinding wheel applies a...
9.8K
00:54Conservation of Energy
11.2K
The terms 'conserved quantity' and 'conservation law' have specific scientific meanings in physics, which differ from the meanings associated with their everyday use. For example, in everyday usage, water could be conserved by not using it, by using less of it, or by re-using it. However, in scientific terms, a conserved quantity of a system stays constant, changes by a definite amount that is transferred to other systems, and is converted into other forms of that...
11.2K