Design of intrinsically disordered region binding proteins

Area of Science:

• Proteomics
• Structural Biology
• Protein Design

Background:

• Intrinsically disordered proteins (IDPs) are crucial in biological processes but difficult to target due to their lack of fixed structures.
• The high variability in IDP sequence and conformation presents a significant challenge for drug discovery and molecular recognition.

Purpose of the Study:

• To develop a generalizable computational approach for designing proteins that can bind to intrinsically disordered protein regions.
• To create specific and high-affinity binders for a diverse set of unstructured protein targets.

Main Methods:

• A novel design strategy was employed to create proteins with binding pockets complementary to extended conformations of IDPs.
• Computational design was followed by experimental validation, including affinity measurements and in-cell functionality tests.

Main Results:

• Successfully designed binders for 39 diverse intrinsically disordered targets, achieving high affinities (100 pM to 100 nM) in 34 instances.
• Designed binders demonstrated functionality within cellular environments and as specific detection reagents.
• All-by-all binding assays confirmed the high specificity of the designed binders for their intended targets.

Conclusions:

• The developed protein design approach represents a significant advancement in addressing the challenge of intrinsically disordered protein recognition.
• This method offers a powerful tool for targeting IDPs, paving the way for new applications in molecular biology and medicine.