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Updated: Aug 2, 2026
07:44
Identifying Protein-protein Interaction Sites Using Peptide Arrays
Published on: November 18, 2014
Motifs involved in protein-protein interactions
C Slingsby1, O A Bateman, A Simpson
1Birkbeck College, Department of Crystallography, London, UK.
Molecular Biology Reports
|April 1, 1993
Summary
Protein interactions vary greatly. Dimeric proteins with regular motifs show interface interactions similar to monomer stabilization, with loops acting as linkers. Multi-domain protein interactions depend on linker conformation, and complex associations often involve motif sharing.
Area of Science:
- Biochemistry
- Structural Biology
- Protein Science
Background:
- Protein interactions are fundamental to biological processes.
- The stability and function of proteins are heavily influenced by their quaternary structure.
- Understanding protein-protein interfaces is key to deciphering complex biological mechanisms.
Purpose of the Study:
- To investigate the general principles governing protein-protein interactions.
- To explore how structural motifs and linkers contribute to protein complex stability.
- To analyze the role of domain and subunit arrangement in protein association.
Main Methods:
- Analysis of protein structures with varying symmetries (dimeric, multi-domain, complex assemblies).
- Examination of interface interactions in relation to monomeric stabilization.
- Investigating the conformational impact of linkers between protein domains and subunits.
Main Results:
- In dimeric proteins with regular motifs, interface interactions resemble monomer-stabilizing interactions.
- Loops within motifs or domains can function as linkers, enhancing stability across interfaces.
- Linker conformation significantly affects interactions in multi-domain proteins.
- Complex subunit associations, including rotational and cubic symmetry, often involve shared motifs.
Conclusions:
- Protein interaction strategies are diverse, ranging from simple motif-based interfaces to complex linker-mediated arrangements.
- The conversion of loops into linkers is a key mechanism for stabilizing dimeric protein interfaces.
- Linker conformation is a critical determinant of interaction specificity and stability in multi-domain proteins and complex assemblies.
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