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Updated: May 23, 2026
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Enzymatic Modification and Flow Cytometry Assessment of Yeast Surface Displayed Proteins
Published on: May 30, 2025
Evolvability of yeast protein-protein interaction interfaces
David Talavera1, Simon G Williams, Matthew G S Norris
1Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK.
Journal of Molecular Biology
|April 5, 2012
Summary
Protein binding interfaces can change without losing function. Some residues interact in ways that allow substitutions, maintaining binding specificity and enabling evolutionary adaptation.
Area of Science:
- Biochemistry
- Evolutionary Biology
- Structural Biology
Background:
- Protein-protein interactions are crucial for biological functions.
- Despite their importance, binding interfaces show significant amino acid variability.
- Coevolution explains some variability, but not all observed changes.
Purpose of the Study:
- To investigate the hypothesis that certain types of residue interactions allow for substitutions at protein binding interfaces.
- To identify residues involved in 'residue type independent' interactions.
- To determine if these interactions are less constrained and conserved.
Main Methods:
- Analysis of protein interaction interfaces to identify residue contacts.
- Classification of contacts based on residue type dependence.
- Comparison of structural constraints and evolutionary conservation between different contact types.
Main Results:
- Nearly a quarter of interface residues engage in exclusively residue-type-independent contacts.
- These residues exhibit lower structural constraints compared to residue-type-specific contacts.
- Residue-type-independent residues are less evolutionarily conserved than those involved in specific interactions.
Conclusions:
- Residue-type-independent interactions provide a mechanism for substitutions at protein binding interfaces.
- This adaptability allows for evolutionary changes without compromising binding specificity.
- Understanding these interactions is key to explaining protein evolution and interface plasticity.
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