Design of intrinsically disordered region binding proteins

Area of Science:

• Protein engineering and design
• Molecular recognition of intrinsically disordered proteins

Background:

• Intrinsically disordered proteins (IDPs) are crucial in biological processes but challenging to target due to their lack of stable structures.
• High variability in IDP sequence and conformation complicates the development of specific binding agents.

Purpose of the Study:

• To present a generalizable computational approach for designing protein binders targeting intrinsically disordered protein regions.
• To create binders capable of recognizing diverse IDP conformations and binding pockets.

Main Methods:

• Utilized a computational design strategy to generate protein binders for intrinsically disordered protein targets.
• Tested approximately 22 designs per target, including polar targets, across 39 diverse unstructured proteins.

Main Results:

• Achieved pM to 100 nM binding affinities in 34 out of 39 cases.
• Designed binders demonstrated functionality within cellular environments and as detection reagents.
• All-by-all binding experiments confirmed high specificity for intended intrinsically disordered protein targets.

Conclusions:

• The developed design approach offers a significant advancement in addressing the challenge of intrinsically disordered protein and peptide recognition.
• This method provides a pathway towards a general solution for targeting these dynamic biological molecules.