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Protein-protein Interfaces

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...

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Updated: Sep 19, 2025

Protein Engineering by Yeast Surface Display

Protein Engineering by Yeast Surface Display

Published on: November 29, 2024

Decoding protein-peptide interactions using a large, target-agnostic yeast surface display library.

Joseph D Hurley¹, Irina Shlosman¹, Megha Lakshminarayan¹

¹Department of Biological Chemistry and Molecular Pharmacology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.

Biorxiv : the Preprint Server for Biology

|June 6, 2025

Summary

This summary is machine-generated.

Researchers developed a large yeast surface display library to discover high-affinity peptide binders for proteins. This method efficiently identifies novel peptide ligands and characterizes binding interactions for biomedical applications.

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Published on: December 6, 2017

Area of Science:

Biochemistry
Molecular Biology
Biotechnology

Background:

Protein-peptide interactions are crucial for biological processes and drug discovery.
Current methods for identifying high-affinity peptide binders are often low-throughput.
Characterizing peptide sequence properties that drive protein binding is challenging.

Purpose of the Study:

To develop a high-throughput method for discovering peptide ligands with high-affinity binding to target proteins.
To characterize sequence motifs that mediate protein-peptide binding interactions.
To create a versatile yeast surface display library for broader applications in biochemical research.

Main Methods:

Construction of a yeast surface display library with approximately 6.1 × 10^9 unique peptides.
Screening the library against diverse protein targets, including antibodies, an E3 ubiquitin ligase, and a bacterial enzyme.
Identification of binding motifs and novel high-affinity peptide clones.

Main Results:

Successful identification of specific binding motifs for each tested protein target.
Discovery of multiple novel peptide clones exhibiting high-affinity binding.
Demonstration of the library's effectiveness across different protein classes.

Conclusions:

The yeast surface display library is a powerful and versatile tool for peptide ligand discovery.
This approach facilitates the characterization of protein-peptide binding interactions.
The library will be made available to enable further research in the field.