Molecular structure and function of P2X receptors

Area of Science:

• Molecular biophysics
• Ion channel function
• Neuroscience

Background:

• P2X receptors are trimeric, cation-selective ion channels gated by ATP.
• Recent structural and functional data have advanced understanding of P2X receptor mechanisms.
• Key questions remain regarding pore opening and intracellular domain dynamics.

Purpose of the Study:

• To review functional studies of P2X receptors in the post-structure era.
• To clarify ATP binding and P2X receptor activation mechanisms.
• To explain allosteric modulation of P2X receptor function.

Main Methods:

• Biochemical analyses
• Electrophysiological recordings
• Molecular engineering approaches
• X-ray crystallography

Main Results:

• Delineation of principles for ligand binding, channel opening, and allosteric modulation.
• Emerging understanding of ATP-triggered P2X receptor channel opening.
• Identification of remaining questions on pore opening and intracellular domain movement.

Conclusions:

• Functional studies in the post-structure era provide insights into P2X receptor mechanisms.
• Understanding ATP binding and allosteric modulation is crucial for P2X receptor function.
• Further research is needed to elucidate pore opening and intracellular domain dynamics.