Seven Helix Chemoattractant Receptors Transiently Stimulate Mitogen-activated Protein Kinase in Dictyostelium

Seven Helix Chemoattractant Receptors Transiently Stimulate Mitogen-activated Protein Kinase in Dictyostelium
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盘基网柄菌中的七个螺旋趋化剂受体瞬时刺激有丝分裂原激活的蛋白激酶

DOI:
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发表时间:
1996
影响因子:
4.8
通讯作者:
R. Firtel
R. Firtel
中科院分区:
生物学2区
文献类型:
--
作者:
M. Maeda;L. Aubry;R. Insall;C. Gaskins;P. Devreotes;R. Firtel

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丝裂原活化蛋白(MAP)激酶参与控制细胞对各种刺激的反应,可以被蛋白酪氨酸激酶和G蛋白偶联受体激活。先前的研究表明,Dictyostelium MAP激酶ERK2是腺苷酸环化酶正常激活所必需的,而ERK2缺失的细胞是聚集缺陷的。在这篇论文中,我们发现Dictyostelium MAP激酶ERK2在化学引诱剂cAMP的作用下被迅速而短暂地激活。这种反应需要cAMP受体,但不依赖于偶联的Gα2亚基和唯一已知的Gβ亚基。这些数据表明配体介导的腺苷酸环化酶的受体激活需要两种受体依赖途径,一种途径需要异三聚体G蛋白,包括Gα2和唯一已知的Gβ亚基,另一种途径需要ERK2。我们的研究结果表明,ERK2可能通过一种新的受体介导的途径被激活。
Mitogen-activated protein (MAP) kinases are involved in controlling a cell's responses to a variety of stimuli and can be activated by both protein tyrosine kinase and G protein-coupled receptors. It was shown previously that Dictyostelium MAP kinase ERK2 is required for normal activation of adenylyl cyclase and erk2 null cells are aggregation-deficient. In this manuscript, we show that the Dictyostelium MAP kinase ERK2 is rapidly and transiently activated in response to the chemoattractant cAMP. This response requires cAMP receptors, but is independent of the coupled Gα2 subunit and the only known Gβ subunit. These data indicate that ligand-mediated receptor activation of adenylyl cyclase requires two receptor-dependent pathways, one of which requires heterotrimeric G proteins, including Gα2 and the only known Gβ subunit, and the second of which requires ERK2. Our results suggest that ERK2 may be activated by a novel receptor-mediated pathway.
DOI: 10.1016/s0021-9258(18)82362-6
发表时间: 1993-07
期刊: The Journal of biological chemistry
影响因子: --
作者:
R. Davis
通讯作者: R. Davis
CRAC 的鉴定,CRAC 是盘基网柄菌中鸟嘌呤核苷酸刺激腺苷酸环化酶所需的胞质调节剂。
DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
作者:
Lilly,PJ;Devreotes,PN
通讯作者: Devreotes,PN
DOI: --
发表时间: 1986
期刊: The Journal of biological chemistry
影响因子: --
作者:
Theibert,A;Devreotes,PN
通讯作者: Devreotes,PN
DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
作者:
Bhat,GJ;Thekkumkara,TJ;Thomas,WG;Conrad,KM;Baker,KM
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盘基网柄菌中两个发育调节的 G 蛋白 α 亚基基因 G α 7 和 G α 8 的克隆和靶向突变。
DOI: 10.1091/mbc.5.6.691
发表时间: 1994
影响因子: 3.3
作者:
Wu,L;Gaskins,C;Zhou,K;Firtel,RA;Devreotes,PN
通讯作者: Devreotes,PN