ATP-dependent modulation of MgtE in Mg(2+) homeostasis.
ATP-dependent modulation of MgtE in Mg(2+) homeostasis.
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Mg(2) 稳态中 MgtE 的 ATP 依赖性调节。
DOI:
10.1038/s41467-017-00082-w
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发表时间:
2017-07-27
影响因子:
16.6
通讯作者:
Nureki O
中科院分区:
文献类型:
--
作者:
Tomita A;Zhang M;Jin F;Zhuang W;Takeda H;Maruyama T;Osawa M;Hashimoto KI;Kawasaki H;Ito K;Dohmae N;Ishitani R;Shimada I;Yan Z;Hattori M;Nureki O
Magnesium is an essential ion for numerous physiological processes. MgtE is a Mg2+ selective channel involved in the maintenance of intracellular Mg2+ homeostasis, whose gating is regulated by intracellular Mg2+ levels. Here, we report that ATP binds to MgtE, regulating its Mg2+-dependent gating. Crystal structures of MgtE–ATP complex show that ATP binds to the intracellular CBS domain of MgtE. Functional studies support that ATP binding to MgtE enhances the intracellular domain affinity for Mg2+ within physiological concentrations of this divalent cation, enabling MgtE to function as an in vivo Mg2+ sensor. ATP dissociation from MgtE upregulates Mg2+ influx at both high and low intracellular Mg2+ concentrations. Using site-directed mutagenesis and structure based-electrophysiological and biochemical analyses, we identify key residues and main structural changes involved in the process. This work provides the molecular basis of ATP-dependent modulation of MgtE in Mg2+ homeostasis.
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影响因子:
11.1
作者:
Groisman EA;Hollands K;Kriner MA;Lee EJ;Park SY;Pontes MH
通讯作者:
Pontes MH
影响因子:
8
作者:
Hardy, S.;Uetani, N.;Tremblay, M. L.
通讯作者:
Tremblay, M. L.
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:
Ko, YH;Hong, SJ;Pedersen, PL
通讯作者:
Pedersen, PL
影响因子:
11.4
作者:
Hattori, Motoyuki;Iwase, Norihiko;Nureki, Osamu
通讯作者:
Nureki, Osamu