Redox regulation of ER and mitochondrial Ca2+ signaling in cell survival and death

Abstract Physiological signaling by reactive oxygen species (ROS) and their pathophysiological role in cell death are well recognized. This review focuses on two ROS targets that are key to local Ca 2+ signaling at the ER/mitochondrial interface – notably, inositol trisphosphate receptors (IP 3 Rs) and the mitochondrial calcium uniporter (MCU). Both transport systems are central to molecular mechanisms in cell survival and death. Methods for the measurement of the redox state of these proteins and for the detection of ROS nanodomains are described. Recent results on the redox regulation of these proteins are reviewed.