A DNA circuit that records molecular events

Area of Science:

• Molecular Biology
• Systems Biology
• Biotechnology

Background:

• Understanding signal transduction and genetic regulatory networks requires characterizing molecular signal dynamics.
• Detecting transiently produced and consumed molecules presents a significant technical challenge.
• Molecular Event Recorders (MERs) offer a method to convert transient molecular events into stable DNA sequences for analysis.

Purpose of the Study:

• To develop a de novo molecular event recorder capable of processing and encoding information about molecular signals.
• To enable simultaneous, multiparameter recording of molecular events for large-scale deciphering.
• To create a system that can be decoded and quantified using DNA sequencing.

Main Methods:

• Developed a novel molecular event recorder utilizing a strand displacement reaction network.
• Encoded molecular event information using the primer exchange reaction.
• Utilized DNA sequencing for decoding and quantifying the recorded information.

Main Results:

• The molecular event recorder achieved 88% accuracy in classifying the temporal order of molecular signals.
• The system demonstrated 100% accuracy in classifying molecular concentrations.
• The recorder achieved 75% accuracy in classifying the duration of molecular signals.

Conclusions:

• The developed de novo molecular event recorder successfully captures multiparameter information about transient molecular events.
• This programmable system enables simultaneous recording and quantification via DNA sequencing.
• Potential applications include deciphering molecular events in dynamic environments, living cells, and tissues.