Key result
Mutagenesis and verapamil block experiments demonstrated that the selectivity filter, not the S6 bundle crossing, serves as the primary activation gate for ion permeation in Slo2.1 potassium channels.
Population
Xenopus laevis oocytes heterologously expressing Slo2.1 K+ channels
Design
Preclinical
Authors
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No immediate clinical implications for channelopathies; extends preclinical models of Slo2.1 gating beyond S6 crossing.
This preclinical study elucidates that the selectivity filter acts as the activation gate in Slo2.1 K+ channels, providing structural insights into ion channel gating mechanisms.
Garg et al. (2013) studied this question. Mutagenesis of Slo2.1 K+ channels vs. Wild-type Slo2.1 channels was evaluated on Channel activation and ion permeation gating. Mutagenesis and verapamil block experiments demonstrated that the selectivity filter, not the S6 bundle crossing, serves as the primary activation gate for ion permeation in Slo2.1 potassium channels.
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