Delta glutamate receptors are functional glycine- and ᴅ-serine-gated cation channels in situ.
Delta glutamate receptors are functional glycine- and ᴅ-serine-gated cation channels in situ.
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δ 谷氨酸受体是功能性甘氨酸和丝氨酸门控原位阳离子通道。
DOI:
10.1126/sciadv.abk2200
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发表时间:
2021-12-24
期刊:
影响因子:
13.6
通讯作者:
Jayaraman V
中科院分区:
文献类型:
--
作者:
Carrillo E;Gonzalez CU;Berka V;Jayaraman V
The synaptic proteins cerebellin-1 and neurexin-1β permit ion channel activity in delta subtype of ionotropic glutamate receptors. Delta receptors are members of the ionotropic glutamate receptor superfamily and form trans-synaptic connections by interacting with the extracellular scaffolding protein cerebellin-1 and presynaptic transmembrane protein neurexin-1β. Unlike other family members, however, direct agonist-gated ion channel activity has not been recorded in delta receptors. Here, we show that the GluD2 subtype of delta receptor forms cation-selective channels when bound to cerebellin-1 and neurexin-1β. Using fluorescence lifetime measurements and chemical cross-linking, we reveal that tight packing of the amino-terminal domains of GluD2 permits glycine- and d-serine–induced channel openings. Thus, cerebellin-1 and neurexin-1β act as biological cross-linkers to stabilize the extracellular domains of GluD2 receptors, allowing them to function as ionotropic excitatory neurotransmitter receptors in synapses.
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