regulation of synaptic vesicle fusion to presynaptic active zone membrane / protein retention in ER lumen / mossy fiber rosette / detection of cold stimulus involved in thermoception / Activation of Na-permeable kainate receptors / kainate selective glutamate receptor complex / Activation of Ca-permeable Kainate Receptor / regulation of short-term neuronal synaptic plasticity / glutamate receptor activity / negative regulation of synaptic transmission, glutamatergic ...regulation of synaptic vesicle fusion to presynaptic active zone membrane / protein retention in ER lumen / mossy fiber rosette / detection of cold stimulus involved in thermoception / Activation of Na-permeable kainate receptors / kainate selective glutamate receptor complex / Activation of Ca-permeable Kainate Receptor / regulation of short-term neuronal synaptic plasticity / glutamate receptor activity / negative regulation of synaptic transmission, glutamatergic / ubiquitin conjugating enzyme binding / regulation of JNK cascade / inhibitory postsynaptic potential / receptor clustering / modulation of excitatory postsynaptic potential / kainate selective glutamate receptor activity / extracellularly glutamate-gated ion channel activity / ionotropic glutamate receptor complex / positive regulation of synaptic transmission / behavioral fear response / neuronal action potential / glutamate-gated receptor activity / glutamate-gated calcium ion channel activity / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / presynaptic modulation of chemical synaptic transmission / dendrite cytoplasm / hippocampal mossy fiber to CA3 synapse / bioluminescence / SNARE binding / excitatory postsynaptic potential / regulation of membrane potential / generation of precursor metabolites and energy / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / PDZ domain binding / cellular response to glucose stimulus / establishment of localization in cell / regulation of long-term neuronal synaptic plasticity / postsynaptic density membrane / modulation of chemical synaptic transmission / SH3 domain binding / intracellular calcium ion homeostasis / terminal bouton / positive regulation of neuron apoptotic process / presynaptic membrane / neuron apoptotic process / scaffold protein binding / perikaryon / chemical synaptic transmission / negative regulation of neuron apoptotic process / postsynaptic membrane / postsynaptic density / axon / neuronal cell body / ubiquitin protein ligase binding / dendrite / synapse / glutamatergic synapse / endoplasmic reticulum / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能
Green fluorescent protein, GFP / Ionotropic glutamate receptor, metazoa / Ligated ion channel L-glutamate- and glycine-binding site / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel / : / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein ...Green fluorescent protein, GFP / Ionotropic glutamate receptor, metazoa / Ligated ion channel L-glutamate- and glycine-binding site / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel / : / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / Ionotropic glutamate receptor / Eukaryotic homologues of bacterial periplasmic substrate binding proteins. / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I 類似検索 - ドメイン・相同性
Green fluorescent protein / Glutamate receptor ionotropic, kainate 2 / Glutamate receptor ionotropic, kainate 5 類似検索 - 構成要素
ジャーナル: Elife / 年: 2021 タイトル: Architecture and structural dynamics of the heteromeric GluK2/K5 kainate receptor. 著者: Nandish Khanra / Patricia Mge Brown / Amanda M Perozzo / Derek Bowie / Joel R Meyerson / 要旨: Kainate receptors (KARs) are L-glutamate-gated ion channels that regulate synaptic transmission and modulate neuronal circuits. KARs have strict assembly rules and primarily function as heteromeric ...Kainate receptors (KARs) are L-glutamate-gated ion channels that regulate synaptic transmission and modulate neuronal circuits. KARs have strict assembly rules and primarily function as heteromeric receptors in the brain. A longstanding question is how KAR heteromer subunits organize and coordinate together to fulfill their signature physiological roles. Here we report structures of the GluK2/GluK5 heteromer in apo, antagonist-bound, and desensitized states. The receptor assembles with two copies of each subunit, ligand binding domains arranged as two heterodimers and GluK5 subunits proximal to the channel. Strikingly, during desensitization, GluK2, but not GluK5, subunits undergo major structural rearrangements to facilitate channel closure. We show how the large conformational differences between antagonist-bound and desensitized states are mediated by the linkers connecting the pore helices to the ligand binding domains. This work presents the first KAR heteromer structure, reveals how its subunits are organized, and resolves how the heteromer can accommodate functionally distinct closed channel structures.