STIM proteins: dynamic calcium signal transducers.
STIM proteins: dynamic calcium signal transducers.
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DOI:
10.1038/nrm3414
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发表时间:
2012-09
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Stromal interaction molecule (STIM) proteins function in cells as dynamic coordinators of cellular calcium (Ca2+) signals. Spanning the endoplasmic reticulum (ER) membrane, they sense tiny changes in the levels of Ca2+ stored within the ER lumen. As ER Ca2+ is released to generate primary Ca2+ signals, STIM proteins undergo an intricate activation reaction and rapidly translocate into junctions formed between the ER and the plasma membrane. There, STIM proteins tether and activate the highly Ca2+-selective Orai channels to mediate finely controlled Ca2+ signals and to homeostatically balance cellular Ca2+. Details are emerging on the remarkable organization within these STIM-induced junctional microdomains and the identification of new regulators and alternative target proteins for STIM.
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