Structure, function, and modification of the voltage sensor in voltage-gated ion channels

SI Börjesson, F Elinder - Cell biochemistry and biophysics, 2008 - Springer
Voltage-gated ion channels are crucial for both neuronal and cardiac excitability. Decades
of research have begun to unravel the intriguing machinery behind voltage sensitivity …

Gating and regulation of KCNQ1 and KCNQ1+ KCNE1 channel complexes

Y Wang, J Eldstrom, D Fedida - Frontiers in Physiology, 2020 - frontiersin.org
The IKs channel complex is formed by the co-assembly of Kv7. 1 (KCNQ1), a voltage-gated
potassium channel, with its β-subunit, KCNE1 and the association of numerous accessory …

State-dependent electrostatic interactions of S4 arginines with E1 in S2 during Kv7. 1 activation

D Wu, K Delaloye, MA Zaydman… - Journal of General …, 2010 - rupress.org
The voltage-sensing domain of voltage-gated channels is comprised of four transmembrane
helices (S1–S4), with conserved positively charged residues in S4 moving across the …

Chemical modulation of Kv7 potassium channels

M Borgini, P Mondal, R Liu, P Wipf - RSC medicinal chemistry, 2021 - pubs.rsc.org
The rising interest in Kv7 modulators originates from their ability to evoke fundamental
electrophysiological perturbations in a tissue-specific manner. A large number of therapeutic …

Cardiac ion channel regulation in obesity and the metabolic syndrome: relevance to long QT syndrome and atrial fibrillation

AS Aromolaran, M Boutjdir - Frontiers in physiology, 2017 - frontiersin.org
Obesity and its associated metabolic dysregulation leading to metabolic syndrome is an
epidemic that poses a significant public health problem. More than one-third of the world …

A specialized molecular motion opens the Hv1 voltage-gated proton channel

L Mony, TK Berger, EY Isacoff - Nature structural & molecular biology, 2015 - nature.com
The Hv1 proton channel is unique among voltage-gated channels for containing the pore
and gate within its voltage-sensing domain. Pore opening has been proposed to include …

IKs channels open slowly because KCNE1 accessory subunits slow the movement of S4 voltage sensors in KCNQ1 pore-forming subunits

KJ Ruscic, F Miceli, CA Villalba-Galea… - Proceedings of the …, 2013 - National Acad Sciences
Human IKs channels activate slowly with the onset of cardiac action potentials to repolarize
the myocardium. IKs channels are composed of KCNQ1 (Q1) pore-forming subunits that …

Steric hindrance between S4 and S5 of the KCNQ1/KCNE1 channel hampers pore opening

K Nakajo, Y Kubo - Nature communications, 2014 - nature.com
In voltage-gated K+ channels, membrane depolarization induces an upward movement of
the voltage-sensing domains (VSD) that triggers pore opening. KCNQ1 is a voltage-gated …

Rare CACNA1A mutations leading to congenital ataxia

M Izquierdo-Serra, JM Fernández-Fernández… - … -European Journal of …, 2020 - Springer
Human mutations in the CACNA1A gene that encodes the pore-forming α 1A subunit of the
voltage-gated Ca V 2.1 (P/Q-type) Ca 2+ channel cause multiple neurological disorders …

The structural basis of IKs ion-channel activation: mechanistic insights from molecular simulations

S Ramasubramanian, Y Rudy - Biophysical journal, 2018 - cell.com
Relating ion channel (iCh) structural dynamics to physiological function remains a
challenge. Current experimental and computational techniques have limited ability to …