P-type ATPases are molecular machines that use energy derived from ATP hydrolysis to pump ions across membranes. Recent work on the Na+, K+ ATPase has identified a pathway for ions from the extracellular side of the protein to its ion binding sites. This paper employs the marine toxin palytoxin to 'hold open' the gates of the pump, allowing direct measurements of ion flow and defines the entire route for ions from one side of the membrane to the other.
- Ayako Takeuchi
- Nicolás Reyes
- David C. Gadsby