Paradigm shift: new concepts for HCN4 function in cardiac pacemaking

K Hennis, M Biel, S Fenske, C Wahl-Schott - Pflügers Archiv-European …, 2022 - Springer
Hyperpolarization-activated cyclic nucleotide–gated (HCN) channels are the molecular
correlate of the If current and are critically involved in controlling neuronal excitability and …

Ih from synapses to networks: HCN channel functions and modulation in neurons

CL Combe, S Gasparini - Progress in biophysics and molecular biology, 2021 - Elsevier
Hyperpolarization-activated cyclic nucleotide gated (HCN) channels and the current they
carry, I h, are widely and diversely distributed in the central nervous system (CNS). The …

Engineering a K+ channel 'sensory antenna' enhances stomatal kinetics, water use efficiency and photosynthesis

W Horaruang, M Klejchová, W Carroll, FAL Silva-Alvim… - Nature Plants, 2022 - nature.com
Stomata of plant leaves open to enable CO2 entry for photosynthesis and close to reduce
water loss via transpiration. Compared with photosynthesis, stomata respond slowly to …

A gain-of-function HCN4 mutant in the HCN domain is responsible for inappropriate sinus tachycardia in a Spanish family

A Cámara-Checa, F Perin… - Proceedings of the …, 2023 - National Acad Sciences
In a family with inappropriate sinus tachycardia (IST), we identified a mutation (p. V240M) of
the hyperpolarization-activated cyclic nucleotide–gated type 4 (HCN4) channel, which …

Gating movements and ion permeation in HCN4 pacemaker channels

A Saponaro, D Bauer, MH Giese, P Swuec, A Porro… - Molecular Cell, 2021 - cell.com
The HCN1–4 channel family is responsible for the hyperpolarization-activated cation current
I f/I h that controls automaticity in cardiac and neuronal pacemaker cells. We present …

Biophysical analysis of an HCN1 epilepsy variant suggests a critical role for S5 helix Met-305 in voltage sensor to pore domain coupling

A Hung, IC Forster, CE Mckenzie, G Berecki… - Progress in Biophysics …, 2021 - Elsevier
Hyperpolarization-gated, cyclic nucleotide-activated (HCN1-4) channels are inwardly
rectifying cation channels that display voltage dependent activation and de-activation …

Compartmentalized cAMP signalling and control of cardiac rhythm

J Tomek, M Zaccolo - Philosophical Transactions of the …, 2023 - royalsocietypublishing.org
In the last 30 years, the field of cyclic adenosine 3′, 5′-monophosphate (cAMP) signalling
has witnessed a transformative development with the realization that cAMP is …

Alternative targets for modulators of mitochondrial potassium channels

A Wrzosek, S Gałecka, M Żochowska, A Olszewska… - Molecules, 2022 - mdpi.com
Mitochondrial potassium channels control potassium influx into the mitochondrial matrix and
thus regulate mitochondrial membrane potential, volume, respiration, and synthesis of …

Computation of the protein conformational transition pathway on ligand binding by linear response-driven molecular dynamics

R Punia, G Goel - Journal of Chemical Theory and Computation, 2022 - ACS Publications
While extremely important for relating the protein structure to its biological function,
determination of the protein conformational transition pathway upon ligand binding is made …

Structural and functional approaches to studying cAMP regulation of HCN channels

A Saponaro, G Thiel, A Moroni - Biochemical Society …, 2021 - portlandpress.com
Hyperpolarization-activated cyclic nucleotide-gated (HCN) channels are primarily activated
by voltage and further modulated by cAMP. While cAMP binding alone does not open the …