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基本情報
登録情報 | データベース: PDB / ID: 9iir | ||||||
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タイトル | human alpha 7 nicotinic acetylcholine receptor in complex with GAT107 and calcium (desensitized state) | ||||||
![]() | Neuronal acetylcholine receptor subunit alpha-7 | ||||||
![]() | MEMBRANE PROTEIN / Ligand-gated ion channel / Positive allosteric modulator / Ago-PAM / Allosteric modulation / Calcium potentiation | ||||||
機能・相同性 | ![]() sensory processing / synaptic transmission involved in micturition / dendrite arborization / response to acetylcholine / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine receptor activity / acetylcholine-gated channel complex / regulation of amyloid fibril formation / acetylcholine-gated monoatomic cation-selective channel activity / short-term memory ...sensory processing / synaptic transmission involved in micturition / dendrite arborization / response to acetylcholine / Highly calcium permeable postsynaptic nicotinic acetylcholine receptors / acetylcholine receptor activity / acetylcholine-gated channel complex / regulation of amyloid fibril formation / acetylcholine-gated monoatomic cation-selective channel activity / short-term memory / cation channel complex / dendritic spine organization / chloride channel regulator activity / acetylcholine binding / regulation of amyloid precursor protein catabolic process / acetylcholine receptor signaling pathway / neurotransmitter receptor complex / positive regulation of amyloid-beta formation / negative regulation of amyloid-beta formation / positive regulation of protein metabolic process / response to amyloid-beta / monoatomic ion channel activity / ligand-gated ion channel signaling pathway / modulation of excitatory postsynaptic potential / plasma membrane raft / negative regulation of tumor necrosis factor production / positive regulation of excitatory postsynaptic potential / toxic substance binding / monoatomic ion transport / negative regulation of canonical NF-kappaB signal transduction / negative regulation of cytokine production involved in inflammatory response / positive regulation of long-term synaptic potentiation / excitatory postsynaptic potential / regulation of membrane potential / response to nicotine / synapse organization / calcium channel activity / memory / cognition / intracellular calcium ion homeostasis / positive regulation of angiogenesis / calcium ion transport / transmembrane signaling receptor activity / amyloid-beta binding / monoatomic ion transmembrane transport / chemical synaptic transmission / postsynaptic membrane / learning or memory / response to hypoxia / neuron projection / positive regulation of ERK1 and ERK2 cascade / postsynapse / positive regulation of MAPK cascade / positive regulation of cell population proliferation / dendrite / synapse / endoplasmic reticulum membrane / signal transduction / protein homodimerization activity / membrane / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.93 Å | ||||||
![]() | Liu, S. / Zheng, Y. / Tian, C. | ||||||
資金援助 | 1件
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![]() | ![]() タイトル: Structural basis for allosteric agonism of human α7 nicotinic acetylcholine receptors. 著者: Sanling Liu / Yining Zheng / Haopeng Chen / Xin Li / Qipeng Yan / Wenjun Mu / Yaning Fu / Huan Chen / Hongwei Hou / Lei Liu / Changlin Tian / ![]() 要旨: The α7 nicotinic acetylcholine receptor (nAChR), a pentameric ligand-gated ion channel, plays important roles in cognition, neuroprotection, and anti-inflammation. As a potential drug target, α7 ...The α7 nicotinic acetylcholine receptor (nAChR), a pentameric ligand-gated ion channel, plays important roles in cognition, neuroprotection, and anti-inflammation. As a potential drug target, α7 nAChR has different binding sites for different ligands, particularly agonists and positive allosteric modulators (PAMs). Ago-PAMs can both directly activate and allosterically modulate α7 nAChR. However, the mechanism underlying α7 nAChR modulation by ago-PAM has yet to be fully elucidated. Here, we present cryo-EM structures of α7 nAChR in complex with the ago-PAM GAT107 and Ca in the open and desensitized states, respectively. Our results from both structural comparisons and functional assays suggest an allosteric mechanism underlying GAT107 modulation and calcium potentiation of α7 nAChR, involving local conformational changes in the ECD-TMD coupling region and a global structural rearrangement in the transmembrane domain. This work provides a new mechanism of α7 nAChR gating distinct from that of conventional agonist binding. These findings would aid in drug design and enrich our biophysical understanding of pentameric ligand-gated ion channels. | ||||||
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NCSドメイン領域: Ens-ID: ens_1
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