Design and construction of chimeric linker library with controllable flexibilities for precision protein engineering

Area of Science:

• Protein Engineering
• Biochemistry
• Molecular Biology

Background:

• Linkers are crucial for fusion protein function, influencing expression, solubility, and biological activity.
• Linker flexibility is a key design parameter affecting the spatial arrangement of fused protein domains.

Purpose of the Study:

• To discuss linker design and engineering strategies for fusion proteins.
• To present a library-based method for optimizing linker flexibility using chimeric linkers.

Main Methods:

• Development of chimeric linkers combining flexible and rigid (helix-forming) motifs.
• Utilizing molecular dynamics simulations and fluorescence resonance energy transfer (FRET) experiments.
• Application of the chimeric linker library for fusion protein optimization.

Main Results:

• Demonstration of a chimeric linker library that spans a wide range of flexibility.
• Bridging the gap between purely flexible and rigid linkers.
• Successful application in enhancing fusion protein properties.

Conclusions:

• Chimeric linkers offer a versatile approach to control linker flexibility in fusion proteins.
• This method provides a valuable tool for optimizing fusion protein expression, solubility, and biological function.
• The developed library-based method facilitates precise engineering of fusion proteins.