Two-pore channel blockade by phosphoinositide kinase inhibitors YM201636 and PI-103 determined by a histidine residue near pore-entrance.
Two-pore channel blockade by phosphoinositide kinase inhibitors YM201636 and PI-103 determined by a histidine residue near pore-entrance.
复制标题
DOI:
10.1038/s42003-022-03701-5
复制
发表时间:
2022-07-23
影响因子:
5.9
通讯作者:
中科院分区:
文献类型:
--
作者:
Human two-pore channels (TPCs) are endolysosomal cation channels and play an important role in NAADP-evoked Ca2+ release and endomembrane dynamics. We found that YM201636, a PIKfyve inhibitor, potently inhibits PI(3,5)P2-activated human TPC2 with an IC50 of 0.16 μM. YM201636 also effectively inhibits NAADP-activated TPC2 and a constitutively-open TPC2 L690A/L694A mutant channel; whereas it exerts little effect when applied in the channel’s closed state. PI-103, a YM201636 analog and an inhibitor of PI3K and mTOR, also inhibits human TPC2 with an IC50 of 0.64 μM. With mutational, virtual docking, and molecular dynamic simulation analyses, we found that YM201636 and PI-103 directly block the TPC2’s open-state channel pore at the bundle-cross pore-gate region where a nearby H699 residue is a key determinant for channel’s sensitivity to the inhibitors. H699 likely interacts with the blockers around the pore entrance and facilitates their access to the pore. Substitution of a Phe for H699 largely accounts for the TPC1 channel’s insensitivity to YM201636. These findings identify two potent TPC2 channel blockers, reveal a channel pore entrance blockade mechanism, and provide an ion channel target in interpreting the pharmacological effects of two commonly used phosphoinositide kinase inhibitors. YM201636 and PI-103 are potent inhibitors of human two-pore channel 2 that act through a channel pore entrance blockade mechanism.
登录
查看更多内容
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:
4.6
作者:
Netcharoensirisuk P;Abrahamian C;Tang R;Chen CC;Rosato AS;Beyers W;Chao YK;Filippini A;Di Pietro S;Bartel K;Biel M;Vollmar AM;Umehara K;De-Eknamkul W;Grimm C
通讯作者:
Grimm C
影响因子:
16
作者:
Lees JA;Li P;Kumar N;Weisman LS;Reinisch KM
通讯作者:
Reinisch KM
影响因子:
64.8
作者:
Kintzer AF;Stroud RM
通讯作者:
Stroud RM
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