Interplay between Calcium, Diacylglycerol, and Phosphorylation in the Spatial and Temporal Regulation of PKCα-GFP*

Interplay between Calcium, Diacylglycerol, and Phosphorylation in the Spatial and Temporal Regulation of PKCα-GFP*
复制标题

钙、二酰甘油和磷酸化在 PKCα-GFP* 时空调节中的相互作用

DOI:
10.1074/jbc.m201130200
复制
发表时间:
2002
期刊:
The Journal of Biological Chemistry
影响因子:
--
通讯作者:
Y. Tojyo
Y. Tojyo
中科院分区:
--
文献类型:
--
作者:
A. Tanimura;A. Nezu;T. Morita;N. Hashimoto;Y. Tojyo

文献摘要

参考文献

被引文献

相似文献

蛋白激酶C(PKC)的功能受其亚细胞定位的密切调节。我们表达了PKCα融合绿色荧光蛋白(PKCα-GFP),并在人腮腺细胞系HSY-EB的活细胞和透化细胞中检测其转位。ATP诱导PKCα-GFP往返于质膜的振荡性转位,抑制了重复性Ca 2+峰的出现。Staurosporine减弱了PKCα-GFP向胞浆的迁移,并在ATP刺激期间引起PKCα-GFP在质膜上的逐步积累。二酰甘油增强ATP诱导的PKCα-GFP振荡移位的幅度和持续时间。离子霉素诱导PKCα-GFP瞬时易位至质膜,尽管胞浆Ca 2+持续升高。离子霉素诱导的PKCα-GFP的瞬时易位被星形孢菌素、甘油二酯和佛波醇肉豆蔻酸酯延长。使用透化细胞的实验表明,星形孢菌素或ATP和Mg 2+的消除降低了PKCα-GFP从膜上解离的速率。甘油二酯能减缓PKCα-GFP从细胞膜上的解离,与Ca 2+浓度无关。ATP加Mg ~(2+)在低浓度Ca ~(2+)(<500 nm)时减弱甘油二酯的作用,但在高浓度Ca ~(2+)(>1000 nm)时不减弱。这些数据表明,在PKCα的膜结合调节中,Ca 2+、甘油二酯和磷酸化之间存在复杂的相互作用。
The function of protein kinase C (PKC) is closely regulated by its subcellular localization. We expressed PKCα fused to green fluorescent protein (PKCα-GFP) and examined its translocation in living and permeabilized cells of the human parotid cell line, HSY-EB. ATP induced an oscillatory translocation of PKCα-GFP to and from the plasma membrane that paralleled the appearance of repetitive Ca2+ spikes. Staurosporine attenuated the relocation of PKCα-GFP to the cytosol and caused a stepwise accumulation of PKCα-GFP at the plasma membrane during ATP stimulation. Diacylglycerol enhanced the amplitude and duration of the ATP-induced oscillatory translocation of PKCα-GFP. Ionomycin induced a transient translocation of PKCα-GFP to the plasma membrane despite the continuous elevation of cytosolic Ca2+. The ionomycin-induced transient translocation of PKCα-GFP was prolonged by staurosporine, diacylglycerol, and phorbol myristate acetate. Experiments using permeabilized cells showed that staurosporine or the elimination of ATP and Mg2+ decreases the rate of dissociation of PKCα-GFP from the membrane. Diacylglycerol slowed the dissociation of PKCα-GFP from the membrane regardless of the Ca2+ concentration. The effect of diacylglycerol was attenuated by ATP plus Mg2+ at low concentrations of Ca2+ (<500 nm) but not at high concentrations of Ca2+ (>1000 nm). These data suggest a complex interplay between Ca2+, diacylglycerol, and phosphorylation in the regulation of the membrane binding of PKCα.
巨噬细胞中蛋白激酶 C 底物 pleckstrin 的表达:与吞噬体膜的关联。
DOI: --
发表时间: 1999
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Brumell,JH;Howard,JC;Craig,K;Grinstein,S;Schreiber,AD;Tyers,M
通讯作者: Tyers,M
DOI: 10.1126/science.7716516
发表时间: 1995-04-14
期刊: SCIENCE
影响因子: 56.9
作者:
MOCHLYROSEN, D
通讯作者: MOCHLYROSEN, D
与界面佛波酯的钙独立结合导致蛋白激酶 C 在没有酸性脂质的情况下与膜结合。
DOI: 10.1021/bi952031q
发表时间: 1996
期刊: Biochemistry.
影响因子: --
作者:
Mosior,M;Newton,AC
通讯作者: Newton,AC
DOI: 10.1021/bi00187a035
发表时间: 1994-05-31
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
NEWTON, AC;KERANEN, LM
通讯作者: KERANEN, LM
DOI: --
发表时间: 1992
期刊: The Journal of biological chemistry
影响因子: --
作者:
Zheleznyak,A;Brown,EJ
通讯作者: Brown,EJ