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Split Hybridization Probe Utilizing a DNA Fluorescent Light-up Aptamer as a Signal Reporter for Sequence-Specific Nucleic Acid Analysis

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Fluorescence detection of adenosine triphosphate using smart probe.

Changbei Ma¹, Hanchun Chen, Rui Han

¹School of Biological Science and Technology, Central South University, Changsha 410013, China. lhlmcb@yahoo.com.cn

Analytical Biochemistry

|July 5, 2012

Summary

A new fluorescent probe enables sensitive detection of adenosine triphosphate (ATP). This DNA ligation-based method offers a simpler, cheaper, and highly sensitive assay for ATP quantification.

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Area of Science:

Biochemistry
Molecular Biology
Analytical Chemistry

Background:

Adenosine triphosphate (ATP) is a crucial molecule in cellular energy transfer.
Accurate ATP quantification is vital for understanding various biological processes.
Existing ATP assay methods have limitations in sensitivity, cost, or complexity.

Purpose of the Study:

To develop a novel, highly sensitive fluorescent probe for adenosine triphosphate (ATP) assay.
To utilize DNA ligation as the core mechanism for ATP detection.
To provide a simpler and more cost-effective alternative to current ATP assay techniques.

Main Methods:

A smart fluorescent probe, T4 DNA ligase, and two short oligonucleotides were employed.
The T4 DNA ligase catalyzes a ligation reaction in the presence of ATP.
Ligation product formation leads to the restoration of the smart probe's fluorescence.

Main Results:

The novel method demonstrated high sensitivity for ATP detection.
A limit of detection as low as 0.5 nM was achieved.
The assay proved to be significantly simpler and more cost-effective than existing methods.

Conclusions:

The proposed DNA ligation-based fluorescent probe offers a superior approach for ATP assay.
This method is approximately 40 times more sensitive than current standard assays.
The technique presents a promising tool for biochemical and cellular research requiring ATP measurement.