An unexpected role for a glutamate receptor

An unexpected role for a glutamate receptor
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谷氨酸受体的意想不到的作用

DOI:
10.1126/science.adm6771
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发表时间:
2023
期刊:
影响因子:
56.9
通讯作者:
Coombs I
Coombs I
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Coombs I

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由神经递质谷氨酸激活的离子通道是大脑神经元之间兴奋性信号的基础。在哺乳动物中,这些离子型谷氨酸受体(iGluRs)分别属于由GluA、GluN和GluK亚基形成的三个家族:α-氨基-3-羟基-5-甲基-4-异恶唑丙酸(AMPA)、N-甲基-D-天冬氨酸(NMDA)和红藻氨酸受体。相比之下,第四个同源iGluR家族的受体-δ或GluD受体-对谷氨酸没有反应。尽管与其他iGluR共享类似的结构,包括跨膜孔,但GluD受体是否传递电流的问题一直存在争议(,)。相反,它们最为人所知的是突触组织蛋白(,)。在本期的第1389页,Piotet al.show指出,GluD家族的一个成员GluD 1可以结合抑制性神经递质γ-氨基丁酸(GABA),并触发GABA介导的突触电流的增强。这挑战了谷氨酸和GABA受体之间的教条式区分,并将GluD 1鉴定为抑制性信号传导的调节剂。
Ion channels activated by the neurotransmitter glutamate underlie excitatory signaling between neurons in the brain. In mammals, these ionotropic glutamate receptors (iGluRs) belong to three families formed from GluA, GluN, and GluK subunits, respectively: the α-amino-3-hydroxy- 5-methyl-4-isoxazolepropionic acid (AMPA),N-methyl-D-aspartate (NMDA), and kainate receptors . By contrast, receptors of a fourth homologous iGluR family—the δ or GluD receptors—do not respond to glutamate. Despite sharing a similar architecture with other iGluRs, including a transmembrane pore, the question of whether GluD receptors pass current has been controversial (, ). Instead, they are best known as synaptic organizing proteins (, ). On page 1389 of this issue, Piotet al.show that one GluD family member, GluD1, can bind the inhibitory neurotransmitter γ-aminobutyric acid (GABA) and trigger potentiation of GABA-mediated synaptic currents. This challenges the dogmatic distinction between glutamate and GABA receptors and identifies GluD1 as a regulator of inhibitory signaling.
DOI: --
发表时间: 2007
期刊: The Journal of physiology
影响因子: --
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GluD1 结合 GABA 并控制抑制可塑性
DOI: 10.1126/science.adf3406
发表时间: 2023
期刊: Science
影响因子: 56.9
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