Application of BisANS fluorescent dye for developing a novel protein assay

Area of Science:

• Biochemistry
• Analytical Chemistry
• Molecular Biology

Background:

• Accurate protein quantification is crucial in biological and chemical research.
• Existing protein assays (e.g., Qubit, Bradford, bicinchoninic acid) have limitations in diverse experimental conditions.
• Novel assays are needed to meet varied research requirements like pH, detergents, and inhibitors.

Purpose of the Study:

• To develop and validate a novel, sensitive protein assay.
• To utilize the 4,4'-Dianilino-1,1'-binaphthyl-5,5'-disulfonic acid dipotassium salt (BisANS) fluorescent dye for protein detection.
• To offer an alternative to standard protein quantification methods.

Main Methods:

• Development of a protein assay based on the BisANS fluorescent dye.
• Characterization of BisANS properties: solubility, photostability, pH compatibility, and interaction kinetics.
• Testing the assay's sensitivity and applicability across a wide range of protein concentrations (0.28 to >100 μg/mL).
• Evaluation of the assay's tolerance to common biological and chemical reagents (chelators, detergents, inhibitors).

Main Results:

• The BisANS assay demonstrates high sensitivity, detecting protein concentrations from 0.28 up to over 100 μg/mL.
• BisANS exhibits excellent properties for protein detection: good water solubility, high photostability, and rapid interaction kinetics (seconds).
• The assay is compatible with various sample conditions, showing no exclusionary sensitivity to chelators, detergents, and inhibitors.

Conclusions:

• The novel BisANS protein assay is a sensitive, rapid, and versatile tool for protein quantification.
• This assay is applicable to diverse biological and chemical samples, offering an advantageous alternative to existing methods.
• The BisANS assay's robustness makes it suitable for various research environments with unique requirements.