TPC proteins are phosphoinositide- activated sodium-selective ion channels in endosomes and lysosomes.
TPC proteins are phosphoinositide- activated sodium-selective ion channels in endosomes and lysosomes.
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DOI:
10.1016/j.cell.2012.08.036
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发表时间:
2012-10-12
期刊:
影响因子:
64.5
通讯作者:
Xu H
中科院分区:
文献类型:
--
作者:
Wang X;Zhang X;Dong XP;Samie M;Li X;Cheng X;Goschka A;Shen D;Zhou Y;Harlow J;Zhu MX;Clapham DE;Ren D;Xu H
Mammalian Two-Pore Channels (TPC1, 2; TPCN1, TPCN2) encode ion channels in intracellular endosomes and lysosomes and were proposed to mediate endolysosomal calcium release triggered by the second messenger, nicotinic acid adenine dinucleotide phosphate (NAADP). By directly recording TPCs in endolysosomes from wild-type and TPC double knockout mice, here we show that, in contrast to previous conclusions, TPCs are in fact sodium-selective channels activated by PI(3,5)P2, and are not activated by NAADP. Moreover, the primary endolysosomal ion is Na+, not K+, as had been previously assumed. These findings suggest that the organellar membrane potential may undergo large regulatory changes, and may explain the specificity of PI(3,5)P2 in regulating the fusogenic potential of intracellular organelles.
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DOI:
10.1074/jbc.m110.162073
发表时间:
2010-12-03
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Brailoiu E;Rahman T;Churamani D;Prole DL;Brailoiu GC;Hooper R;Taylor CW;Patel S
通讯作者:
Patel S
影响因子:
16.6
作者:
Dong, Xian-ping;Shen, Dongbiao;Wang, Xiang;Dawson, Taylor;Li, Xinran;Zhang, Qi;Cheng, Xiping;Zhang, Yanling;Weisman, Lois S.;Delling, Markus;Xu, Haoxing
通讯作者:
Xu, Haoxing
影响因子:
4.7
作者:
Dong XP;Wang X;Xu H
通讯作者:
Xu H
影响因子:
7.3
作者:
Jain P;Slama JT;Perez-Haddock LA;Walseth TF
通讯作者:
Walseth TF
影响因子:
64.8
作者:
Graves, Austin R.;Curran, Patricia K.;Mindell, Joseph A.
通讯作者:
Mindell, Joseph A.