Parallel stopped-flow interrogation of diverse biological systems at the single-molecule scale

Area of Science:

• Biophysics
• Molecular Biology
• Biochemistry

Background:

• Single-molecule imaging offers deep insights into biological systems.
• Current methods like single-molecule fluorescence and Förster resonance energy transfer (FRET) are limited to one sample at a time, restricting throughput and introducing variability.
• This limitation can obscure functional differences in similar biological systems.

Purpose of the Study:

• To introduce a novel parallel rapid exchange technique for single-molecule fluorescence and FRET.
• To enable simultaneous steady-state and pre-steady-state analyses of multiple biological systems.
• To overcome the throughput limitations and experimental variances of traditional single-molecule methods.

Main Methods:

• Developed parallel rapid exchange single-molecule fluorescence and single-molecule FRET.
• Applied the method to interrogate biomolecular conformational dynamics and interactions.
• Enabled simultaneous steady-state and pre-steady-state measurements.

Main Results:

• Elucidated the timing of conformational events in β-arrestin1 activation.
• Revealed antibiotic-induced effects on messenger RNA decoding fidelity.
• Demonstrated that ribosomal RNA sequence variations influence antibiotic sensitivity.

Conclusions:

• The new parallel method significantly enhances the scope and reproducibility of quantitative single-molecule studies.
• This generalizable and scalable technique allows for simultaneous interrogation of diverse biological systems.
• Advances understanding of biomolecular function, drug interactions, and genetic variations.