Data on preparation and characterization of an insect odorant receptor based biosensor

Area of Science:

• Biochemistry
• Biosensor Technology
• Analytical Chemistry

Background:

• Insect odorant receptors (OrXs) exhibit high sensitivity and selectivity for volatile organic compounds (VOCs).
• OrXs can serve as recognition elements in biosensors for detecting airborne chemicals.

Purpose of the Study:

• To develop a method for expressing and purifying insect OrXs.
• To reconstitute purified OrXs into liposomes for biosensor applications.
• To characterize and validate the performance of OrX-based biosensors.

Main Methods:

• Expression and purification of insect OrXs.
• Reconstitution of OrXs into artificial lipid bilayers (liposomes).
• Immobilization of OrX/liposomes onto a gold surface via covalent attachment.
• Characterization using Quartz Crystal Microbalance with Dissipation monitoring (QCM-D).
• Detection of odorant interactions using Electrochemical Impedance Spectroscopy (EIS) and QCM-D.

Main Results:

• Successful expression, purification, and reconstitution of insect OrXs into liposomes.
• Stable immobilization of OrX/liposomes on a gold surface.
• Demonstrated sensitivity and selectivity of the biosensor towards specific odorants.
• Quantification of odorant interactions using EIS and QCM-D.

Conclusions:

• Insect OrXs reconstituted into liposomes are effective recognition elements for biosensors.
• The developed biosensor platform demonstrates high sensitivity and selectivity for odorant detection.
• This approach offers a promising method for developing ultrasensitive biosensors for VOC analysis.