GABAB receptor subunit GB1 at the cell surface independently activates ERK1/2 through IGF-1R transactivation.
GABAB receptor subunit GB1 at the cell surface independently activates ERK1/2 through IGF-1R transactivation.
复制标题
DOI:
10.1371/journal.pone.0039698
复制
发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Liu J
中科院分区:
文献类型:
--
作者:
Baloucoune GA;Chun L;Zhang W;Xu C;Huang S;Sun Q;Wang Y;Tu H;Liu J
Functional GABAB receptor is believed to require hetero-dimerization between GABAB1 (GB1) and GABAB2 (GB2) subunits. The GB1 extracellular domain is required for ligand binding, and the GB2 trans-membrane domain is responsible for coupling to G proteins. Atypical GABAB receptor responses observed in GB2-deficient mice suggested that GB1 may have activity in the absence of GB2. However the underlying mechanisms remain poorly characterized. Here, by using cells overexpressing a GB1 mutant (GB1asa) with the ability to translocate to the cell surface in the absence of GB2, we show that GABAB receptor agonists, such as GABA and Baclofen, can induce ERK1/2 phosphorylation in the absence of GB2. Furthermore, we demonstrate that GB1asa induces ERK1/2 phosphorylation through Gi/o proteins and PLC dependent IGF-1R transactivation. Our data suggest that GB1 may form a functional receptor at the cell surface in the absence of GB2.
登录
查看更多内容
影响因子:
3.7
作者:
Nakamura Y;Hinoi E;Takarada T;Takahata Y;Yamamoto T;Fujita H;Takada S;Hashizume S;Yoneda Y
通讯作者:
Yoneda Y
影响因子:
4.7
作者:
Franek, M;Pagano, A;Blahos, J
通讯作者:
Blahos, J
DOI:
10.1006/bbrc.1998.9706
发表时间:
1998-12-09
影响因子:
3.1
作者:
Isomoto, S;Kaibara, M;Taniyama, K
通讯作者:
Taniyama, K
影响因子:
11.4
作者:
Rives, Marie-Laure;Vol, Claire;Prezeau, Laurent
通讯作者:
Prezeau, Laurent
影响因子:
3.4
作者:
Cao J;Huang S;Qian J;Huang J;Jin L;Su Z;Yang J;Liu J
通讯作者:
Liu J