Pleiotropic Effects of Pasteurella multocida Toxin Are Mediated by Gq-dependent and -independent Mechanisms

Pleiotropic Effects of Pasteurella multocida Toxin Are Mediated by Gq-dependent and -independent Mechanisms
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多杀性巴氏杆菌毒素的多效性是由 Gq 依赖性和非依赖性机制介导的

DOI:
10.1074/jbc.m007819200
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发表时间:
2001
期刊:
The Journal of Biological Chemistry
影响因子:
--
通讯作者:
S. Offermanns
S. Offermanns
中科院分区:
--
文献类型:
--
作者:
A. Zywietz;A. Gohla;M. Schmelz;G. Schultz;S. Offermanns

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多杀性巴氏杆菌毒素(PMT)是一种高效的有丝分裂原,对多种细胞类型。PMT已被证明可以诱导各种细胞信号传导过程,并已被认为通过异源三聚体G蛋白Gq/G11发挥作用。为了分析Gq/G11在PMT作用中的作用,我们研究了毒素在Gαq/Gα 11双缺陷成纤维细胞以及仅缺乏Gαq或Gα11的成纤维细胞中的作用。有趣的是,PMT反应中肌醇磷酸的形成完全依赖于Gαq,而不是密切相关的Gα11。虽然Gαq/Gα11双缺陷和Gα q缺陷细胞对PMT不产生任何磷酸肌醇,但PMT仍能在这些细胞中诱导各种其他细胞效应,包括激活Rho,形成依赖于Rho的肌动蛋白应力纤维和粘着斑,以及刺激c-Jun N-末端激酶和细胞外信号调节激酶。这些数据表明,PMT导致多种细胞效应,这些效应仅部分由异源三聚体G蛋白Gq介导。
Pasteurella multocida toxin (PMT) is a highly potent mitogen for a variety of cell types. PMT has been shown to induce various cellular signaling processes, and it has been suggested to function through the heterotrimeric G-proteins Gq/G11. To analyze the role of Gq/G11 in the action of PMT, we have studied the effect of the toxin in Gαq/Gα11double-deficient fibroblasts as well as in fibroblasts lacking only Gαq or Gα11. Interestingly, formation of inositol phosphates in response to PMT was exclusively dependent on Gαq but not on the closely related Gα11. Although Gαq/Gα11 double-deficient and Gαq-deficient cells did not respond with any production of inositol phosphates to PMT, PMT was still able to induce various other cellular effects in these cells, including the activation of Rho, the Rho-dependent formation of actin stress fibers and focal adhesions, as well as the stimulation of c-Jun N-terminal kinase and extracellular signal-regulated kinase. These data show that PMT leads to a variety of cellular effects that are mediated only in part by the heterotrimeric G-protein Gq.
DOI: 10.1016/s0021-9258(18)35680-1
发表时间: 1992-12
期刊: The Journal of biological chemistry
影响因子: --
作者:
Dianqing Wu;A. Katz;C. Lee;Melvin I. Simon
通讯作者: Dianqing Wu;A. Katz;C. Lee;Melvin I. Simon
DOI: --
发表时间: 1993-07
期刊: The Journal of biological chemistry
影响因子: --
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DOI: 10.1073/pnas.87.23.9113
发表时间: 1990-12-01
影响因子: 11.1
作者:
STRATHMANN, M;SIMON, MI
通讯作者: SIMON, MI
DOI: 10.1016/s0021-9258(18)98970-2
发表时间: 1991-06
期刊: The Journal of biological chemistry
影响因子: --
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通讯作者: Ronald L. Wange;A. Smrcka;P. Sternweis;J. Exton