Method To Determine Protein Concentration in the Protein-Nanoparticle Conjugates Aqueous Solution Using Circular...

Area of Science:

• Bionanotechnology
• Biophysical Chemistry
• Materials Science

Background:

• Protein-nanoparticle conjugates (protein-NPs) are vital in bionanotechnology.
• Accurate protein concentration determination in protein-NPs is currently lacking.
• Existing methods may be destructive or unsuitable for these complex systems.

Purpose of the Study:

• To develop a simple and nondestructive method for quantifying protein concentration in protein-NPs.
• To establish the utility of circular dichroism (CD) spectroscopy for this purpose.
• To enable precise characterization of protein-NPs for advanced applications.

Main Methods:

• Utilized circular dichroism (CD) spectroscopy.
• Employed various nanoparticles (carbon dots, gold nanoparticles) and proteins (human transferrin, albumin, ovalbumin).
• Developed a calibration curve based on CD spectra for quantification.

Main Results:

• Successfully quantified protein concentration in aqueous solutions of protein-NPs.
• Demonstrated the non-destructive nature of the CD spectroscopy approach.
• Validated the method across different protein-nanoparticle combinations.

Conclusions:

• Circular dichroism (CD) spectroscopy provides a viable and simple method for protein quantification in protein-NPs.
• This technique overcomes limitations of previous methods, enabling better characterization.
• The developed approach supports the advancement of protein-NP based bionanotechnology.