c-Myc G-quadruplex is sensitively and specifically recognized by a fluorescent probe

Area of Science:

• Biochemistry
• Molecular Biology
• Nanotechnology

Background:

• The c-myc gene sequence forms G-quadruplex structures with significant physiological roles.
• G-quadruplexes are implicated in various biological processes and have applications in nanotechnology.
• Existing probes for c-myc G-quadruplex detection lack sufficient specificity and sensitivity.

Purpose of the Study:

• To develop a highly specific and sensitive fluorescent probe for recognizing the c-myc G-quadruplex.
• To address the scarcity of reliable probes for c-myc G-quadruplex detection.

Main Methods:

• Synthesis and characterization of a cyanine dye fluorescent probe, named Cy-1.
• Evaluation of Cy-1's fluorescence properties in aqueous solutions.
• Testing Cy-1's specificity against various G-quadruplex and non-G-quadruplex structures.

Main Results:

• Cy-1 exhibits minimal fluorescence in aqueous solution.
• Cy-1 demonstrates over 1000-fold fluorescence enhancement upon binding to c-myc G-quadruplex.
• Cy-1 shows excellent specificity, distinguishing c-myc G-quadruplex from other nucleic acid structures.

Conclusions:

• Cy-1 is a highly sensitive and specific fluorescent probe for c-myc G-quadruplex.
• Cy-1's properties make it a promising tool for c-myc G-quadruplex detection in biological and nanotechnology fields.