Switchable Nanochannel Biosensor for H₂S Detection Based on an Azide Reduction Reaction Controlled BSA Aggregation.

Area of Science:

• Biotechnology
• Plant Science
• Chemical Biology

Background:

• Hydrogen sulfide (H₂S) is an endogenous gaseous signaling molecule crucial for various biological processes.
• H₂S plays a role in increasing plant salt tolerance by regulating ion channels, specifically the K⁺ channel.

Purpose of the Study:

• To design and develop a H₂S-responsive artificial nanochannel biosensor.
• To utilize an azide reduction reaction strategy for creating a biomimetic sensing device.
• To investigate the role of H₂S in plant salt tolerance and ion channel function.

Main Methods:

• Designed a H₂S-responsive artificial nanochannel biosensor.
• Employed an azide reduction reaction strategy for H₂S detection.
• Observed H₂S-induced BSA aggregation on the nanochannel, leading to ion gating.

Main Results:

• The biosensor demonstrated excellent selectivity and sensitivity to H₂S.
• The device exhibited a high ion gating ratio due to specific azide reduction by H₂S.
• The H₂S-responsive biosensor showed remarkable reversibility, stability, and a fast response rate.

Conclusions:

• The developed artificial nanochannel biosensor effectively detects H₂S.
• This biomimetic device provides a valuable tool for studying the synergistic effects of H₂S in biological systems.
• The findings contribute to a better understanding of H₂S's role in plant salt tolerance and ion channel regulation.