Engineering a highly sensitive biosensor for abscisic acid in mammalian cells.

Area of Science:

• Plant hormone signaling
• Biomarker discovery
• Mammalian cell biology

Background:

• Abscisic acid (ABA) is a conserved signaling molecule with emerging roles in mammalian systems.
• ABA's potential as a biomarker for diseases like COPD and glioma necessitates sensitive detection methods.
• Existing ABA biosensors lack the sensitivity for low mammalian ABA concentrations.

Purpose of the Study:

• To develop a highly sensitive and reliable biosensor for quantifying ABA in mammalian cells and tissues.
• To optimize a previously established plant-based ABA biosensor for enhanced sensitivity.
• To enable accurate ABA measurement at low concentrations relevant to mammalian physiology.

Main Methods:

• Engineered a plant-based ABA biosensor by replacing the PYL1 receptor with high-affinity PYL proteins.
• Tested the optimized biosensor system using the PYL8 receptor in HEK293T mammalian cells.
• Evaluated the biosensor's sensitivity for detecting low concentrations of ABA.

Main Results:

• The optimized biosensor system utilizing the PYL8 receptor demonstrated enhanced sensitivity.
• Successfully quantified low concentrations of ABA in HEK293T cells.
• The PYL8-engineered biosensor provides a reliable and sensitive method for ABA detection.

Conclusions:

• The PYL8-engineered ABA biosensor is a significant advancement for detecting low ABA levels in mammalian systems.
• This tool facilitates further research into ABA's physiological and pathological roles in mammals.
• The developed biosensor offers a sensitive, rapid, and cost-effective method for ABA quantification.