Electron-conformational transformations in nanoscopic RyR channels govern both the heart's contraction and beating

TL;DR

This paper presents a biophysical electron-conformational model of RyR channels that explains the heart's rhythmic contractions and pacemaker activity under normal and overload conditions.

Contribution

It introduces a simple biophysical model that unifies the understanding of RyR channel behavior in different cardiac cell types.

Findings

Model explains oscillatory behavior in pacemaker and ventricular cells

Accounts for normal physiological and overload conditions

Provides a unified framework for RyR channel dynamics

Abstract

We show that a simple biophysically based electron-conformational model of RyR channel is able to explain and describe on equal footing the oscillatory regime of the heart's cell release unit both in sinoatrial node (pacemaker) cells under normal physiological conditions and in ventricular myocytes under Ca$^{2+}$ SR overload.