Bestrophin-2 and glutamine synthetase form a complex for glutamate release.
Bestrophin-2 and glutamine synthetase form a complex for glutamate release.
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DOI:
10.1038/s41586-022-05373-x
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发表时间:
2022-11
期刊:
影响因子:
64.8
通讯作者:
Yang, Tingting
中科院分区:
文献类型:
--
作者:
Owji, Aaron P.;Yu, Kuai;Kittredge, Alec;Wang, Jiali;Zhang, Yu;Yang, Tingting
Bestrophin-2 (Best2) is a member of the bestrophin family of calcium-activated anion channels with critical involvement in ocular physiology. Here, we uncover a directional permeability of Best2 to glutamate heavily favoring glutamate exit, identify glutamine synthetase (GS) as a binding partner of Best2 in the ciliary body of the eye, and solve the structure of the Best2-GS complex. Best2 reduces cytosolic GS activity by tethering GS to the cell membrane. GS extends the ion conducting pathway of Best2 through its central cavity and inhibits Best2 channel function in the absence of intracellular glutamate, but sensitizes Best2 to intracellular glutamate, which promotes opening of Best2 and thus relieves the inhibitory effect of GS. The physiological role of Best2 in conducting chloride and glutamate and the influence of GS are demonstrated in non-pigmented ciliary epithelial cells. Together, our results reveal a novel mechanism of glutamate release through Best2-GS.
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影响因子:
48
作者:
Barad BA;Echols N;Wang RY;Cheng Y;DiMaio F;Adams PD;Fraser JS
通讯作者:
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DOI:
10.1107/s2059798318009324
发表时间:
2018-09-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
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通讯作者:
Cowtan, K
影响因子:
4.4
作者:
Bakall, Benjamin;McLaughlin, Precious;Marmorstein, Alan D.
通讯作者:
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