Distance between K+ ions in potassium channel

Range ~7 Å
Organism Unspecified
Reference Yellen G. The voltage-gated potassium channels and their relatives. Nature. 2002 Sep 5 419(6902):35-42. p.37 right column 2nd paragraphPubMed ID12214225
Comments p.37 right column 2nd paragraph:"Finally, a long-known feature of potassium channels is that K+ ions pass through in single file, with simultaneous occupancy by multiple ions [refs 5, 10, 11, 12]. The mutual electrostatic repulsion between adjacent K+ ions (spaced about 7 Å apart) destabilizes ions in the pore, permitting the other favourable interactions to produce ion selectivity without producing overly tight binding that would impair rapid permeation."
Entered by Uri M
ID 111646