STIM1 clusters and activates CRAC channels via direct binding of a cytosolic domain to Orai1.
STIM1 clusters and activates CRAC channels via direct binding of a cytosolic domain to Orai1.
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DOI:
10.1016/j.cell.2009.02.014
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发表时间:
2009-03-06
期刊:
影响因子:
64.5
通讯作者:
Lewis RS
中科院分区:
文献类型:
--
作者:
Park CY;Hoover PJ;Mullins FM;Bachhawat P;Covington ED;Raunser S;Walz T;Garcia KC;Dolmetsch RE;Lewis RS
Store-operated Ca2+ channels activated by the depletion of Ca2+ from the endoplasmic reticulum (ER) are a major Ca2+ entry pathway in non-excitable cells and are essential for T cell activation and adaptive immunity. Following store depletion, the ER Ca2+ sensor STIM1 and the CRAC channel protein Orai1 redistribute to ER-plasma membrane (PM) junctions, but the fundamental issue of how STIM1 activates the CRAC channel at these sites is unresolved. Here we identify a minimal, highly conserved 107-aa CRAC activation domain (CAD) of STIM1 that binds directly to the N- and C-termini of Orai1 to open the CRAC channel. Purified CAD forms a tetramer that clusters CRAC channels, but analysis of STIM1 mutants reveals that channel clustering is not sufficient for channel activation. These studies establish a molecular mechanism for store-operated Ca2+ entry in which the direct binding of STIM1 to Orai1 drives the accumulation and the activation of CRAC channels at ER-PM junctions.
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影响因子:
64.8
作者:
Prakriya, Murali;Feske, Stefan;Hogan, Patrick G.
通讯作者:
Hogan, Patrick G.
DOI:
10.1073/pnas.0806499105
发表时间:
2008-09-09
影响因子:
11.1
作者:
Ji, Wei;Xu, Pingyong;Chen, Liangyi
通讯作者:
Chen, Liangyi
DOI:
10.1073/pnas.0608358103
发表时间:
2006-11-07
影响因子:
11.1
作者:
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通讯作者:
Kurosaki, Tomohiro
影响因子:
4.8
作者:
Li, Zhengzheng;Lu, Jingze;Xu, Tao
通讯作者:
Xu, Tao
影响因子:
5.5
作者:
Bautista, DM;Hoth, M;Lewis, RS
通讯作者:
Lewis, RS