The X-ray crystal structure of a eukaryotic Ca2+-activated chloride channel, BEST1, and its function in liposomes are described; the structure shows that Ca2+ binds to the cytosolic region of this pentameric channel and reveals that the pore is approximately 95 Å long with at least 15 distinct anion-binding sites.
- Veronica Kane Dickson
- Leanne Pedi
- Stephen B. Long