期刊
NATURE CELL BIOLOGY
卷 8, 期 7, 页码 771-U231出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncb1435
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- NIAID NIH HHS [R01-AI050200, R01 AI050200] Funding Source: Medline
- NIGMS NIH HHS [5-R37-GM053950, R37 GM053950, R01 GM065360, R01-GM065360] Funding Source: Medline
- NINDS NIH HHS [R01-NS040927, R01 NS040927] Funding Source: Medline
Depletion of intracellular calcium stores activates store-operated calcium entry across the plasma membrane in many cells. STIM1, the putative calcium sensor in the endoplasmic reticulum, and the calcium release-activated calcium ( CRAC) modulator CRACM1 ( also known as Orai1) in the plasma membrane have recently been shown to be essential for controlling the store-operated CRAC current ( I-CRAC)(1-4). However, individual overexpression of either protein fails to significantly amplify I-CRAC. Here, we show that STIM1 and CRACM1 interact functionally. Overexpression of both proteins greatly potentiates I-CRAC, suggesting that STIM1 and CRACM1 mutually limit store-operated currents and that CRACM1 may be the long-sought CRAC channel.
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