Mechanism of multi-site phosphorylation from a ROCK-I:RhoE complex structure.
Mechanism of multi-site phosphorylation from a ROCK-I:RhoE complex structure.
复制标题
ROCK-I:RhoE 复合物结构的多位点磷酸化机制。
DOI:
10.1038/emboj.2008.226
复制
发表时间:
2008-12-03
期刊:
影响因子:
11.4
通讯作者:
Barford, David
中科院分区:
文献类型:
--
作者:
Komander, David;Garg, Ritu;Wan, Paul T. C.;Ridley, Anne J.;Barford, David
The ROCK-I serine/threonine protein kinase mediates the effects of RhoA to promote the formation of actin stress fibres and integrin-based focal adhesions. ROCK-I phosphorylates the unconventional G-protein RhoE on multiple N- and C-terminal sites. These phosphorylation events stabilise RhoE, which functions to antagonise RhoA-induced stress fibre assembly. Here, we provide a molecular explanation for multi-site phosphorylation of RhoE from the crystal structure of RhoE in complex with the ROCK-I kinase domain. RhoE interacts with the C-lobe αG helix of ROCK-I by means of a novel binding site remote from its effector region, positioning its N and C termini proximal to the ROCK-I catalytic site. Disruption of the ROCK-I:RhoE interface abolishes RhoE phosphorylation, but has no effect on the ability of RhoE to disassemble stress fibres. In contrast, mutation of the RhoE effector region attenuates RhoE-mediated disruption of the actin cytoskeleton, indicating that RhoE exerts its inhibitory effects on ROCK-I through protein(s) binding to its effector region. We propose that ROCK-I phosphorylation of RhoE forms part of a feedback loop to regulate RhoA signalling.
登录
查看更多内容
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
4.8
作者:
Amano, M;Ito, M;Kaibuchi, K
通讯作者:
Kaibuchi, K
DOI:
10.1083/jcb.147.5.1023
发表时间:
1999-11-29
期刊:
The Journal of cell biology
影响因子:
--
作者:
Kawano Y;Fukata Y;Oshiro N;Amano M;Nakamura T;Ito M;Matsumura F;Inagaki M;Kaibuchi K
通讯作者:
Kaibuchi K
DOI:
10.1107/s0907444902016657
发表时间:
2002-11-01
影响因子:
2.2
作者:
Adams, PD;Grosse-Kunstleve, RW;Terwilliger, TC
通讯作者:
Terwilliger, TC
影响因子:
56.9
作者:
Kimura, K;Ito, M;Kaibuchi, K
通讯作者:
Kaibuchi, K