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Development of Single-Molecule Electrical Identification Method for Cyclic Adenosine Monophosphate Signaling Pathway
Yuki Komoto1,2, Takahito Ohshiro1, Masateru Taniguchi1
1Institute of Science and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
Nanomaterials (Basel, Switzerland)
|April 3, 2021
Summary
Single-molecule quantum measurements successfully detected cyclic adenosine monophosphate (cAMP) and distinguished it from other adenosine molecules. Machine learning analysis achieved high accuracy, aiding the study of cellular signaling pathways.
Area of Science:
- Biophysics
- Molecular Biology
- Nanotechnology
Background:
- Cyclic adenosine monophosphate (cAMP) is crucial for intracellular signaling, activating protein kinases and regulating molecular transport.
- Accurate detection of cAMP, adenosine triphosphate (ATP), adenosine monophosphate (AMP), and adenosine diphosphate (ADP) is vital for studying these pathways.
Purpose of the Study:
- To develop a method for selectively detecting cAMP at the single-molecule level.
- To differentiate cAMP signals from those of ATP, AMP, and ADP using electrical conductance measurements.
Main Methods:
- Utilized single-molecule quantum measurements with nanogap devices to determine electrical conductance.
- Applied a machine learning approach to analyze and discriminate signals from different adenosine molecules.
Main Results:
- Achieved single-molecule electrical detection of cAMP.
- Demonstrated successful discrimination of cAMP from AMP (0.82 accuracy), ADP (0.70 accuracy), and ATP (0.72 accuracy).
- Attained over 99.9% accuracy in discrimination when analyzing more than ten signals.
Conclusions:
- The developed method enables selective, single-molecule detection of cAMP.
- Discrimination is attributed to structural differences in the ribose-phosphate site, particularly between cAMP and other adenosine molecules.
- This technique offers a valuable tool for investigating intercellular signaling pathways involving small molecular second messengers.
