Article
Graded activation of CRAC channel by binding of different numbers of STIM1 to Orai1 subunits.
Cell research - 1 Feb 2011
Li Zhengzheng, Liu Lin, Deng Yongqiang, Ji Wei, Du Wen, Xu Pingyong, Chen Liangyi, Xu Tao
Abstract excerpt
The Ca(2+) release-activated Ca(2+) (CRAC) channel pore is formed by Orai1 and gated by STIM1 after intracellular Ca(2+) store depletion. To resolve how many STIM1 molecules are required to open a CRAC channel, we fused different numbers of Orai1 subunits with functional two-tandem cytoplasmic domains of STIM1 (residues 336-485, designated as S domain). Whole-cell patch clamp recordings of these chimeric...
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