A βγ Dimer Derived from G13 Transduces the Angiotensin AT1 Receptor Signal to Stimulation of Ca2+ Channels in Rat Portal Vein Myocytes*
A βγ Dimer Derived from G13 Transduces the Angiotensin AT1 Receptor Signal to Stimulation of Ca2+ Channels in Rat Portal Vein Myocytes*
复制标题
G13 衍生的 βγ 二聚体可转导血管紧张素 AT1 受体信号以刺激大鼠门静脉肌细胞中的 Ca2+ 通道*
DOI:
--
复制
发表时间:
1997
影响因子:
4.8
通讯作者:
J. Mironneau
中科院分区:
文献类型:
--
作者:
N. Macrez;J. Morel;F. Kalkbrenner;P. Viard;G. Schultz;J. Mironneau
A G protein composed of α13, β1, and γ3 subunits selectively couples the angiotensin AT1A receptors to increase cytoplasmic Ca2+ concentration ([Ca2+] i ) in rat portal vein myocytes (Macrez-Leprêtre, N., Kalkbrenner, F., Morel, J. L., Schultz, G., and Mironneau, J. (1997) J. Biol. Chem. 272, 10095–10102). We show here that Gβγ transduces the signal leading to stimulation of L-type Ca2+channels. Intracellular dialysis through the patch pipette of a carboxyl-terminal anti-βcom antibody and a peptide corresponding to the Gβγ binding region of the β-adrenergic receptor kinase 1 inhibited the stimulation of Ca2+channels and the increase in [Ca2+] i evoked by angiotensin II. The Gβγ binding peptide did not prevent the dissociation of the heterotrimeric G protein into its subunits, as it did not block activation of phospholipase C-β by Gαq in response to stimulation of α1-adrenoreceptors. Transient overexpression of the β-adrenergic receptor kinase 1 fragment and of Gα subunits also inhibited the angiotensin II-induced increase in [Ca2+] i . Both anti-α13 antibody and carboxyl-terminal α13 peptide abrogated the angiotensin II-induced stimulation of Ca2+ channels. We conclude that activation of angiotensin AT1 receptors requires all three α, β, and γ subunits of G13 for receptor-G protein interaction, whereas the transduction of the signal to L-type Ca2+ channels is mediated by Gβγ.
登录
查看更多内容
影响因子:
56.9
作者:
Wei-Jen Tang;A. Gilman
通讯作者:
Wei-Jen Tang;A. Gilman
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hell,JW;Yokoyama,CT;Wong,ST;Warner,C;Snutch,TP;Catterall,WA
通讯作者:
Catterall,WA
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Hawes,BE;Luttrell,LM;Exum,ST;Lefkowitz,RJ
通讯作者:
Lefkowitz,RJ
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Zhang,J;King,WG;Dillon,S;Hall,A;Feig,L;Rittenhouse,SE
通讯作者:
Rittenhouse,SE
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Rasenick,MM;Watanabe,M;Lazarevic,MB;Hatta,S;Hamm,HE
通讯作者:
Hamm,HE