Related Experiment Video
Updated: Jun 20, 2026

Isolation of Human Myoblasts, Assessment of Myogenic Differentiation, and Store-operated Calcium Entry Measurement
Published on: July 26, 2017
Recent progress on STIM1 domains controlling Orai activation
1Institute of Biophysics, University of Linz, A-4040 Linz, Austria. rainer.schindl@jku.at
Abstract:
Ca(2+) entry in non-excitable cells is mainly carried by store-operated channels among which the CRAC channel is best characterized. Its two limiting molecular components are represented by the Ca(2+) sensor protein STIM1 located in the endoplasmic reticulum and Orai1 in the plasma membrane. STIM1 senses a decrease of the Ca(2+) content in internal stores and triggers its accumulation into puncta like structures resulting in coupling to as well as activation of Orai1 channels. The STIM1-Orai coupling process is determined by an interaction via their C-termini. This review highlights recent developments on domains particularly within the cytosolic part of STIM1 that govern this interaction.
Related Concept Videos
IP3/DAG Signaling Pathway
Notch Signaling Pathway
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Notch Signaling Pathway
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Activation and Inactivation of G Proteins
Action Potentials
Propagation of Action Potentials
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...

