Ras-association domain of sorting Nexin 27 is critical for regulating expression of GIRK potassium channels.

Ras-association domain of sorting Nexin 27 is critical for regulating expression of GIRK potassium channels.
复制标题

DOI:
10.1371/journal.pone.0059800
复制
发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Slesinger PA
Slesinger PA
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Balana B;Bahima L;Bodhinathan K;Taura JJ;Taylor NM;Nettleton MY;Ciruela F;Slesinger PA

文献摘要

参考文献

被引文献

相似文献

G蛋白门控内向整流钾(GIRK)通道在调节神经元兴奋性中起着重要作用。分选Nexin 27b(SNX27b)通过PDZ结构域的相互作用降低GIRK通道的表面表达,它含有一个功能未知的RAS-Association(RA)结构域。删除SNX27b(SNX27b-ΔRA)中的RA结构域可以防止GIRK2c/GIRK3通道的下调。同样,RA结构域上的一个点突变(K305A)在体外扰乱了GIRK2c/GIRK3通道的调节,并减少了H-RAS的结合。最后,显性-负性H-RAS(S17N)阻断了依赖SNX27b的GIRK2c/GIRK3通道表面表达的下降。因此,功能性RA结构域的存在以及与RAS样G蛋白的相互作用构成了SNX27b调控GIRK通道表面表达和细胞兴奋性的新机制。
G protein-gated inwardly rectifying potassium (GIRK) channels play an important role in regulating neuronal excitability. Sorting nexin 27b (SNX27b), which reduces surface expression of GIRK channels through a PDZ domain interaction, contains a putative Ras-association (RA) domain with unknown function. Deleting the RA domain in SNX27b (SNX27b-ΔRA) prevents the down-regulation of GIRK2c/GIRK3 channels. Similarly, a point mutation (K305A) in the RA domain disrupts regulation of GIRK2c/GIRK3 channels and reduces H-Ras binding in vitro. Finally, the dominant-negative H-Ras (S17N) occludes the SNX27b-dependent decrease in surface expression of GIRK2c/GIRK3 channels. Thus, the presence of a functional RA domain and the interaction with Ras-like G proteins comprise a novel mechanism for modulating SNX27b control of GIRK channel surface expression and cellular excitability.
DOI: 10.1074/jbc.m800642200
发表时间: 2008-04-25
影响因子: 4.8
作者:
Lee, Jiyeon;Retamal, Claudio;Bu, Guojun
通讯作者: Bu, Guojun
DOI: 10.1128/mcb.01044-10
发表时间: 2011-04-01
影响因子: 5.3
作者:
Cai, Lei;Loo, Li Shen;Hong, Wanjin
通讯作者: Hong, Wanjin
DOI: 10.1046/j.1460-9568.2003.02933.x
发表时间: 2003-10-01
影响因子: 3.4
作者:
Leaney, JL
通讯作者: Leaney, JL
DOI: 10.1016/j.bbrc.2007.05.162
发表时间: 2007-08-10
影响因子: 3.1
作者:
MacNeil, Adam J.;Mansour, Marc;Pohajdak, Bill
通讯作者: Pohajdak, Bill
DOI: 10.1016/s0014-5793(99)00555-4
发表时间: 1999-05-21
期刊: FEBS LETTERS
影响因子: 3.5
作者:
Vetter, IR;Linnemann, T;Wittinghofer, A
通讯作者: Wittinghofer, A