Native SOCE complexes: Small but mighty?
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Updated: Nov 4, 2025

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
Published on: April 1, 2017
Raphael Courjaret1, Khaled Machaca1
1Department of Physiology and Biophysics, Ca(2+) Signaling Group, Weill Cornell Medicine Qatar, Education City, Qatar Foundation, PO Box 24144, Doha, Qatar.
Abstract:
Our current understanding of the molecular mechanisms underlying activation of store-operated Ca2+ entry (SOCE) relies in large part on studies that modulate the expression of STIM1 and Orai1. Shen et al. present the first detailed study to address the dynamics and stoichiometry of endogenous STIM1 and Orai1. They argue for an active SOCE cluster centered around a single Orai1 channel per punctum linked to 12 STIM1 dimers, which could have significant implications on SOCE-dependent Ca2+ signaling.
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