Essential control of an endothelial cell ISOC by the spectrin membrane skeleton.
Essential control of an endothelial cell ISOC by the spectrin membrane skeleton.
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光谱膜骨架对内皮细胞ISOC的基本控制。
DOI:
10.1083/jcb.200106156
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发表时间:
2001-09-17
影响因子:
7.8
通讯作者:
Stevens, T
中科院分区:
文献类型:
--
作者:
Wu, SW;Sangerman, J;Li, M;Brough, GH;Goodman, SR;Stevens, T
Mechanism(s) underlying activation of store-operated Ca2+ entry currents, I SOC, remain incompletely understood. F-actin configuration is an important determinant of channel function, although the nature of interaction between the cytoskeleton and I SOC channels is unknown. We examined whether the spectrin membrane skeleton couples Ca2+ store depletion to Ca2+ entry. Thapsigargin activated an endothelial cell I SOC (−45 pA at −80 mV) that reversed at +40 mV, was inwardly rectifying when Ca2+ was the charge carrier, and was inhibited by La3+ (50 μM). Disruption of the spectrin–protein 4.1 interaction at residues A207-V445 of βSpIIΣ1 decreased the thapsigargin-induced global cytosolic Ca2+ response by 50% and selectively abolished the endothelial cell I SOC, without altering activation of a nonselective current through cyclic nucleotide–gated channels. In contrast, disruption of the spectrin–actin interaction at residues A47-K186 of βSpIIΣ1 did not decrease the thapsigargin-induced global cytosolic Ca2+ response or inhibit I SOC. Results indicate that the spectrin–protein 4.1 interaction selectively controls I SOC, indicating that physical coupling between calcium release and calcium entry is reliant upon the spectrin membrane skeleton.
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影响因子:
64.5
作者:
Arancio, O;Kiebler, M;Hawkins, RD
通讯作者:
Hawkins, RD
影响因子:
3.8
作者:
Goodman, SR
通讯作者:
Goodman, SR
影响因子:
64.8
作者:
HOTH, M;PENNER, R
通讯作者:
PENNER, R
DOI:
10.1152/ajplung.1998.275.3.l574
发表时间:
1998-09-01
影响因子:
4.9
作者:
Moore, TM;Brough, GH;Stevens, T
通讯作者:
Stevens, T
影响因子:
3.5
作者:
Holda, JR;Blatter, LA
通讯作者:
Blatter, LA