Determinant for β-subunit regulation in high-conductance voltage-activated and Ca 2+ -sensitive K + channels: An additional transmembrane region at the N terminus
Population
Human MaxiK channel and Drosophila homologue (in vitro models)
Comparison
Chimeric exchange of 41 N-terminal amino acids… vs Wild-type Drosophila homologue
Design
Preclinical
Authors
Discussion
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Member takes
Implication
S0 confers beta-subunit sensitivity in chimeric channels; leaves open translation to native cardiovascular tissues or therapeutic targeting.
Structured PICO
P
Population
Human MaxiK channel and Drosophila homologue (in vitro models)
I
Intervention
Chimeric exchange of 41 N-terminal amino acids, including the S0 segment, from the human MaxiK channel to the Drosophila homologue
C
Comparator
Wild-type Drosophila homologue (unresponsive to beta-subunit modulation)
O
Outcome
Sensitivity to beta-subunit modulationsurrogate
The study identifies a unique seventh transmembrane segment (S0) at the N terminus of MaxiK channels that is essential for beta-subunit regulation.
Cite This Study
Wallner et al. (1996) studied this question.