From genes to protein mechanics on a chip

Area of Science:

• Biophysics
• Molecular Biology
• Microfluidics

Background:

• Single-molecule force spectroscopy is crucial for understanding protein mechanics.
• Current methods face limitations in experimental throughput, hindering parallel screening of protein constructs.

Purpose of the Study:

• To present a novel microfluidic platform for enhanced throughput in single-molecule protein mechanical analysis.
• To enable on-chip expression, attachment, and mechanical probing of proteins.

Main Methods:

• Development of a microfluidic device for integrated protein synthesis and mechanical testing.
• Utilizing a dockerin tag for repeated force application via a cohesin-modified cantilever.
• Performing thousands of pulling cycles on individual protein molecules.

Main Results:

• Demonstrated successful on-chip expression and covalent surface attachment of proteins.
• Achieved high-throughput mechanical phenotyping through thousands of pulling cycles per protein.
• Validated the platform's capability for screening protein libraries.

Conclusions:

• The microfluidic platform significantly enhances throughput for single-molecule protein mechanical studies.
• This technology facilitates rapid mechanical phenotyping and screening of diverse protein libraries.
• Enables deeper insights into protein mechanics through scalable experimentation.