Voltage Gated Potassium Channel
from Streptomyces Lividans

Original Settings

Electrostatic Surfaces
Takes time to load. Red regions indicated negative potential. Blue regions indicate positive.
Notice the negative potential at the entrance to the Channel, which facilitates K+ entrance from
the cytoplasmic side.

Ribbon Drawing (select twice)
Notice the 3 Rb⁺ ions (in crystal structure instead of K⁺) and the tert-butylammonium ion)
in the channel.

Charged regions
Notice central region has no charge. This indicates its placement in the membrane.

Acidic regions
Water in blue

Basic regions
Water in blue

Protein Channel Entrance

Cartoon of active site
Active site in Purple (VAL76); (TYR78); (GLY 77);(GLY 79)

Sulfur region
 sulfur in Red Water in Blue

Created by Thu Nguyen & Gina Fasching