Direct regulation of the pacemaker “funny” current (If) by cyclic AMP (cAMP) underlies heart rate modulation by the autonomic nervous system. At the molecular level, cAMP activates hyperpolarization-activated cyclic nucleotide-gated (HCN) channels that drive If in sinoatrial node (SAN) myocytes. Even though HCN channel genes were identified more than 20 years ago, the understanding of how cAMP regulates their gating is still fragmented. Here we summarize present understanding on how the cAMP signal is transmitted from the cytosolic to the transmembrane (TM) domain in HCN4. We further discuss how detailed structural knowledge prompted the development of pharmacological/genetic tools for the control of cAMP regulation in these channels.
Cyclic AMP Regulation and Its Command in the Pacemaker Channel HCN4 / A. Porro, G. Thiel, A. Moroni, A.C. Saponaro. - In: FRONTIERS IN PHYSIOLOGY. - ISSN 1664-042X. - 11(2020 Jul 07), pp. 771.1-771.7.
|Titolo:||Cyclic AMP Regulation and Its Command in the Pacemaker Channel HCN4|
SAPONARO, ANDREA COSIMO (Corresponding)
|Parole Chiave:||cyclic AMP; hyperpolarization-activated cyclic nucleotide-gated (HCN) channels; regulation; structure; “funny” current; heart rate|
|Settore Scientifico Disciplinare:||Settore BIO/09 - Fisiologia|
|Progetto:||The crucial role of HCN2 channels in inflammatory and neuropathic pain|
|Data di pubblicazione:||7-lug-2020|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3389/fphys.2020.00771|
|Appare nelle tipologie:||01 - Articolo su periodico|