Kappa-theraphotoxin-Pg1a

UniProtKB accession:  P84835

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Gating modifier of Kv2.1/KCNB1 (IC(50)=5.1 nM), Kv2.2/KCNB2 and Kv4.3/KCND3 channels (IC(50)=39 nM). Acts by shifting the channel activation to more depolarized potentials by stabilizing the resting conformation of the voltage sensor. It completely inhibits opening of the Kv2.1/KCNB1 channel at negative membrane voltages and dramatically shifts channel activation to positive voltages. May act by partitioning into lipid membranes and then by binding the voltage sensor paddle of the channel from a place within the membrane.