Regulation of human PLD1 and PLD2 by calcium and protein kinase C.
Regulation of human PLD1 and PLD2 by calcium and protein kinase C.
复制标题
钙和蛋白激酶 C 对人类 PLD1 和 PLD2 的调节。
DOI:
10.1016/s0167-4889(00)00049-5
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
Leslie,CC
中科院分区:
文献类型:
--
作者:
Siddiqi,AR;Srajer,GE;Leslie,CC
Numerous studies show that PLD is activated in cells by calcium and by protein kinase C (PKC). We found that human PLD1 and PLD2 expressed in Sf9 cells can be activated by calcium-mobilizing agonists and by co-expression with PKCα. The calcium-mobilizing agonists A23187 and CryIC toxin triggered large increases in phosphatidylethanol (PtdEth) production in Sf9 cells over-expressing PLD1 and PLD2, but not in vector controls. PLD activation by these agonists was largely dependent on extracellular calcium. Membrane assays demonstrated significant PLD1 and PLD2 activity in the absence of divalent cations, which could be enhanced by low levels of calcium either in the presence or absence of magnesium. PLD1 but not PLD2 activity was slightly enhanced by magnesium. Treatment of Sf9 cells expressing PLD1 and PLD2 with PMA resulted in little PtdEth production. However, a significant and comparable formation of PtdEth occurred when PLD1 or PLD2 were co-expressed with PKCα, but not PKCδ, and was further augmented by PMA. In contrast to PLD1, co-expressing PLD2 with PKCα or PKCδ further enhanced A23187-induced PtdEth production. Immunoprecipitation experiments demonstrated that PLD1 and PLD2 associated with the PKC isoforms in Sf9 cells. Furthermore, in membrane reconstitution assays, both PLD1 and PLD2 could be stimulated by calmodulin and PKCα-enriched cytosol. The results indicate that PLD2 as well as PLD1 is subject to agonist-induced activation in intact cells and can be regulated by calcium and PKC.
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DOI:
--
发表时间:
1991
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
J. Schwartz;L. Garneau;L. Masson;R. Brousseau
通讯作者:
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影响因子:
4.8
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通讯作者:
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DOI:
10.1074/jbc.273.50.33722
发表时间:
1998-12
期刊:
The Journal of Biological Chemistry
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
1996
期刊:
Journal of Lipid Mediators and Cell Signalling
影响因子:
--
作者:
M. Liscovitch
通讯作者:
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DOI:
10.1016/0005-2760(95)00106-m
发表时间:
1995
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
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通讯作者:
Y. Nozawa