Segregated cation flux by TPC2 biases Ca(2+) signaling through lysosomes.
Segregated cation flux by TPC2 biases Ca(2+) signaling through lysosomes.
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TPC 2的分离阳离子通量通过溶酶体偏置Ca(2+)信号传导。
DOI:
10.1038/s41467-022-31959-0
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发表时间:
2022-08-02
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Two-pore channels are endo-lysosomal cation channels with malleable selectivity filters that drive endocytic ion flux and membrane traffic. Here we show that TPC2 can differentially regulate its cation permeability when co-activated by its endogenous ligands, NAADP and PI(3,5)P2. Whereas NAADP rendered the channel Ca2+-permeable and PI(3,5)P2 rendered the channel Na+-selective, a combination of the two increased Ca2+ but not Na+ flux. Mechanistically, this was due to an increase in Ca2+ permeability independent of changes in ion selectivity. Functionally, we show that cell permeable NAADP and PI(3,5)P2 mimetics synergistically activate native TPC2 channels in live cells, globalizing cytosolic Ca2+ signals and regulating lysosomal pH and motility. Our data reveal that flux of different ions through the same pore can be independently controlled and identify TPC2 as a likely coincidence detector that optimizes lysosomal Ca2+ signaling. TPC2 is a lysosomal ion channel permeable to both calcium and sodium ions. Here, the authors show that TPC2 can selectively increase its calcium permeability when simultaneously challenged by both its natural activators- NAADP and PI(3,5)P2.
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影响因子:
7.3
作者:
Gunaratne GS;Brailoiu E;He S;Unterwald EM;Patel S;Slama JT;Walseth TF;Marchant JS
通讯作者:
Marchant JS
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
DOI:
10.1073/pnas.1705739114
发表时间:
2017-10-10
影响因子:
11.1
作者:
Chao, Yu-Kai;Schludi, Verena;Grimm, Christian
通讯作者:
Grimm, Christian
DOI:
10.1083/jcb.200904073
发表时间:
2009-07-27
期刊:
The Journal of cell biology
影响因子:
--
作者:
Brailoiu E;Churamani D;Cai X;Schrlau MG;Brailoiu GC;Gao X;Hooper R;Boulware MJ;Dun NJ;Marchant JS;Patel S
通讯作者:
Patel S
DOI:
10.1126/science.aaw9544
发表时间:
2020-01-17
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Freeman SA;Uderhardt S;Saric A;Collins RF;Buckley CM;Mylvaganam S;Boroumand P;Plumb J;Germain RN;Ren D;Grinstein S
通讯作者:
Grinstein S