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Computational Prediction of Amino Acid Preferences of Potentially Multispecific Peptide-Binding Domains Involved in Protein-Protein Interactions
Published on: January 26, 2024
Design of multi-specificity in protein interfaces
Elisabeth L Humphris1, Tanja Kortemme
1Graduate Group in Biophysics, University of California San Francisco, San Francisco, California, United States of America.
Plos Computational Biology
|August 29, 2007
Summary
Protein networks use multi-constraint design to optimize sequences for multiple binding partners. This reveals distinct strategies for multi-specific proteins, impacting interface evolution and rational protein design.
Area of Science:
- Computational biology
- Protein engineering
- Systems biology
Background:
- Protein interactions are crucial for cellular function and network organization.
- Protein interface sequences must balance correct interactions while avoiding unwanted binding.
- Understanding constraints on multi-specific proteins is key to predicting their evolution and function.
Purpose of the Study:
- To develop and apply a multi-constraint protein design protocol.
- To characterize the mechanisms and constraints governing multi-specific protein binding.
- To investigate how protein interfaces adapt to binding multiple partners.
Main Methods:
- Development of a "multi-constraint" computational protocol for protein sequence prediction.
- Application of the protocol to 20 multi-specific proteins.
- Analysis of sequence optimization under single-partner versus multiple-partner binding criteria.
Main Results:
- Identified two distinct patterns of multi-specific binding: shared interactions and multi-faceted interactions.
- Shared interfaces involve common binding residues across partners.
- Multi-faceted interfaces, common in signaling hubs, show partner-specific residue preferences within a single binding site, leading to highly native-like sequences.
Conclusions:
- Multi-specific protein binding is achieved through at least two distinct evolutionary and design strategies.
- Shared interfaces may be suitable targets for small molecule drug design.
- Multi-faceted interfaces offer potential for designing proteins with altered specificities.
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