Functionalized Nano-adsorbent for Affinity Separation of Proteins.

Area of Science:

• Materials Science
• Biotechnology
• Nanotechnology

Background:

• Protein purification is crucial for biochemical research and diagnostics.
• Existing methods can be time-consuming and may affect protein activity.
• Development of novel affinity materials is needed for efficient protein separation.

Purpose of the Study:

• To synthesize and characterize novel SnO2/SiO2-GSH nanospheres for specific protein separation.
• To evaluate the binding capacity, specificity, and reusability of the nanospheres.
• To assess the retained activity of purified proteins.

Main Methods:

• Hydrothermal synthesis of thiol-functionalized silica nanospheres (SiO2-SH NSs).
• Modification with SnO2 quantum dots to create fluorescent SnO2/SiO2 NSs.
• Further functionalization with reduced glutathione (GSH) for GST-tagged protein capture.
• In vitro evaluation of protein binding, non-specific adsorption, and enzyme activity.

Main Results:

• Synthesized SnO2/SiO2-GSH NSs exhibit strong fluorescence for protein tracing.
• Achieved high protein binding capacity (7.4 mg/g) with negligible non-specific adsorption.
• Separated GST-tagged GPX3 retained its redox state and peroxidase activity.
• Demonstrated good reusability of the nanospheres.

Conclusions:

• SnO2/SiO2-GSH NSs are effective for specific and efficient separation of GST-tagged proteins.
• The nanospheres offer a promising platform for rapid protein purification while preserving biological activity.
• Potential applications in biotechnology and diagnostics for purifying tagged proteins.