Fluorescent GTP-sensing in aqueous solution of physiological pH

Area of Science:

• * Supramolecular Chemistry
• * Analytical Chemistry
• * Biophysical Chemistry

Background:

• * Guanosine triphosphate (GTP) and adenosine triphosphate (ATP) are structurally similar and crucial biomolecules.
• * Differentiating between GTP and ATP is vital for biological and chemical analysis.
• * Developing selective and sensitive detection methods for these nucleotides remains a challenge.

Purpose of the Study:

• * To synthesize and characterize a new water-soluble imidazolium anthracene derivative.
• * To investigate the compound's ability to differentiate between GTP and ATP.
• * To explore its potential as a fluorescent chemosensor for GTP and ATP detection in aqueous media.

Main Methods:

• * Synthesis and spectroscopic characterization of the imidazolium anthracene derivative.
• * Fluorescence titration experiments in 100% aqueous solution (pH 7.4, 10 mM HEPES).
• * Analysis of fluorescence quenching and enhancement mechanisms for GTP and ATP binding.

Main Results:

• * The synthesized derivative demonstrated selective differentiation between GTP and ATP.
• * The compound acted as a fluorescence quencher for GTP.
• * The compound functioned as a fluorescence enhancer for ATP, indicating distinct binding interactions.

Conclusions:

• * The water-soluble imidazolium anthracene derivative is a promising tool for distinguishing GTP and ATP.
• * This derivative shows potential as a selective fluorescent chemosensor for nucleotide analysis in biological-relevant conditions.
• * The distinct fluorescence responses (quenching for GTP, enhancement for ATP) enable sensitive detection.