Related Experiment Video
Updated: Jul 16, 2026
09:39
Mapping Dysfunctional Protein-Protein Interactions in Disease
Published on: October 24, 2025
Similar binding sites and different partners: implications to shared proteins in cellular pathways
1Koc University, Center for Computational Biology and Bioinformatics and College of Engineering, Rumelifeneri Yolu, 34450 Sariyer Istanbul, Turkey.
Structure (London, England : 1993)
|March 16, 2007
Summary
Proteins with similar binding sites can interact with different partners by using conserved interactions. Helices facilitate these multi-partner interactions, suggesting these proteins are key "date hubs" in biological networks.
Area of Science:
- Protein-protein interactions
- Structural biology
- Systems biology
Background:
- Understanding how proteins bind to multiple partners is crucial for deciphering complex biological networks.
- Structurally similar protein interfaces can interact with diverse partners, suggesting underlying principles of binding promiscuity.
- Identifying proteins that bind multiple partners, termed 'date hubs', is key to understanding network organization.
Purpose of the Study:
- To investigate the molecular basis of how structurally similar protein interfaces bind to different partners.
- To characterize the interaction patterns and structural features of multi-partner protein interfaces.
- To explore the role of these interfaces in predicting 'date hubs' and network connectivity.
Main Methods:
- Analysis of a dataset of structurally similar protein interfaces.
- Clustering of multipartner protein interfaces to identify common binding-site motifs.
- Characterization of interface properties such as packing, architecture, and size.
- Examination of protein connectivity and interaction networks.
Main Results:
- Proteins with common binding-site motifs utilize conserved interactions at similar interface locations, irrespective of the binding partner.
- Alpha-helices are frequently involved in binding different partners, offering versatile association strategies.
- These multi-partner binding sites exhibit imperfect packing, planar structures, bridging water molecules, and smaller average sizes.
- Proteins with these interfaces show higher connectivity within protein-protein interaction networks.
Conclusions:
- Conserved interactions and adaptable structural features, particularly helices, enable proteins to bind diverse partners.
- The identified characteristics of multi-partner interfaces are indicative of 'date hub' proteins.
- These findings contribute to predicting 'date hubs' and understanding their role in linking biological networks.
Related Concept Videos
02:26Protein Networks
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,...
00:49Ligand 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...
01:19Interactions Between Signaling Pathways
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
01:49Conserved 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...
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...
01:49Conserved 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...
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...
01:57Protein Complexes with Interchangeable Parts
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...