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基本情報
登録情報 | データベース: EMDB / ID: EMD-8721 | ||||||||||||
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タイトル | Structure of AMPA receptor-TARP complex | ||||||||||||
![]() | protein complex | ||||||||||||
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![]() | AMPA receptor-TARP complex / TARP modulation mechanism / partially open channel gate. / membrane protein / metal transport | ||||||||||||
機能・相同性 | ![]() Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / postsynaptic neurotransmitter receptor diffusion trapping / regulation of AMPA receptor activity / Trafficking of AMPA receptors / channel regulator activity / LGI-ADAM interactions / membrane hyperpolarization ...Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / postsynaptic neurotransmitter receptor diffusion trapping / regulation of AMPA receptor activity / Trafficking of AMPA receptors / channel regulator activity / LGI-ADAM interactions / membrane hyperpolarization / nervous system process / protein targeting to membrane / voltage-gated calcium channel complex / spine synapse / dendritic spine neck / neurotransmitter receptor localization to postsynaptic specialization membrane / dendritic spine head / cellular response to amine stimulus / neuromuscular junction development / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / transmission of nerve impulse / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / kainate selective glutamate receptor activity / AMPA glutamate receptor complex / cellular response to glycine / extracellularly glutamate-gated ion channel activity / ionotropic glutamate receptor complex / immunoglobulin binding / asymmetric synapse / conditioned place preference / membrane depolarization / regulation of receptor recycling / glutamate receptor binding / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of synaptic transmission / positive regulation of synaptic transmission, glutamatergic / regulation of postsynaptic membrane neurotransmitter receptor levels / voltage-gated calcium channel activity / regulation of synaptic transmission, glutamatergic / response to fungicide / glutamate-gated receptor activity / cytoskeletal protein binding / regulation of long-term synaptic depression / extracellular ligand-gated monoatomic ion channel activity / cellular response to brain-derived neurotrophic factor stimulus / glutamate-gated calcium ion channel activity / presynaptic active zone membrane / somatodendritic compartment / ionotropic glutamate receptor binding / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / synaptic membrane / hippocampal mossy fiber to CA3 synapse / SNARE binding / dendritic shaft / regulation of membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / calcium channel regulator activity / synaptic transmission, glutamatergic / PDZ domain binding / protein tetramerization / establishment of protein localization / response to calcium ion / postsynaptic density membrane / modulation of chemical synaptic transmission / cerebral cortex development / receptor internalization / Schaffer collateral - CA1 synapse / terminal bouton / synaptic vesicle / synaptic vesicle membrane / presynapse / signaling receptor activity / amyloid-beta binding / growth cone / presynaptic membrane / scaffold protein binding / perikaryon / chemical synaptic transmission / dendritic spine / postsynaptic membrane / neuron projection / postsynaptic density / axon / external side of plasma membrane / neuronal cell body / synapse / dendrite / protein kinase binding / protein-containing complex binding / glutamatergic synapse / cell surface / endoplasmic reticulum / protein-containing complex 類似検索 - 分子機能 | ||||||||||||
生物種 | ![]() ![]() | ||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 4.9 Å | ||||||||||||
![]() | Chen S / Zhao Y / Wang YS / Shekhar M / Gouaux E | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Activation and Desensitization Mechanism of AMPA Receptor-TARP Complex by Cryo-EM. 著者: Shanshuang Chen / Yan Zhao / Yuhang Wang / Mrinal Shekhar / Emad Tajkhorshid / Eric Gouaux / ![]() 要旨: AMPA receptors mediate fast excitatory neurotransmission in the mammalian brain and transduce the binding of presynaptically released glutamate to the opening of a transmembrane cation channel. ...AMPA receptors mediate fast excitatory neurotransmission in the mammalian brain and transduce the binding of presynaptically released glutamate to the opening of a transmembrane cation channel. Within the postsynaptic density, however, AMPA receptors coassemble with transmembrane AMPA receptor regulatory proteins (TARPs), yielding a receptor complex with altered gating kinetics, pharmacology, and pore properties. Here, we elucidate structures of the GluA2-TARP γ2 complex in the presence of the partial agonist kainate or the full agonist quisqualate together with a positive allosteric modulator or with quisqualate alone. We show how TARPs sculpt the ligand-binding domain gating ring, enhancing kainate potency and diminishing the ensemble of desensitized states. TARPs encircle the receptor ion channel, stabilizing M2 helices and pore loops, illustrating how TARPs alter receptor pore properties. Structural and computational analysis suggests the full agonist and modulator complex harbors an ion-permeable channel gate, providing the first view of an activated AMPA receptor. | ||||||||||||
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構造ビューア | EMマップ: ![]() ![]() ![]() |
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マップデータ | ![]() | 5.3 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 13.3 KB 13.3 KB | 表示 表示 | ![]() |
画像 | ![]() | 196.9 KB | ||
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文書・要旨 | ![]() | 375.8 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 375.3 KB | 表示 | |
XML形式データ | ![]() | 5.9 KB | 表示 | |
CIF形式データ | ![]() | 6.8 KB | 表示 | |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | protein complex | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.72 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
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試料の構成要素
-全体 : Fully occupied GluA2 AMPA receptor - TARP complex bound with quis...
全体 | 名称: Fully occupied GluA2 AMPA receptor - TARP complex bound with quisqualate and (R,R)-2b |
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要素 |
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-超分子 #1: Fully occupied GluA2 AMPA receptor - TARP complex bound with quis...
超分子 | 名称: Fully occupied GluA2 AMPA receptor - TARP complex bound with quisqualate and (R,R)-2b タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() ![]() |
-分子 #1: Glutamate receptor 2
分子 | 名称: Glutamate receptor 2 / タイプ: protein_or_peptide / ID: 1 / コピー数: 4 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 99.530391 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MQKIMHISVL LSPVLWGLIF GVSSNSIQIG GLFPRGADQE YSAFRVGMVQ FSTSEFRLTP HIDNLEVANS FAVTNAFCSQ FSRGVYAIF GFYDKKSVNT ITSFCGTLHV SFITPSFPTD GTHPFVIQMR PDLKGALLSL IEYYQWDKFA YLYDSDRGLS T LQAVLDSA ...文字列: MQKIMHISVL LSPVLWGLIF GVSSNSIQIG GLFPRGADQE YSAFRVGMVQ FSTSEFRLTP HIDNLEVANS FAVTNAFCSQ FSRGVYAIF GFYDKKSVNT ITSFCGTLHV SFITPSFPTD GTHPFVIQMR PDLKGALLSL IEYYQWDKFA YLYDSDRGLS T LQAVLDSA AEKKWQVTAI NVGNINNDKK DETYRSLFQD LELKKERRVI LDCERDKVND IVDQVITIGK HVKGYHYIIA NL GFTDGDL LKIQFGGANV SGFQIVDYDD SLVSKFIERW STLEEKEYPG AHTATIKYTS ALTYDAVQVM TEAFRNLRKQ RIE ISRRGN AGDCLANPAV PWGQGVEIER ALKQVQVEGL SGNIKFDQNG KRINYTINIM ELKTNGPRKI GYWSEVDKMV VTLT ELPSG NDTSGLENKT VVVTTILESP YVMMKKNHEM LEGNERYEGY CVDLAAEIAK HCGFKYKLTI VGDGKYGARD ADTKI WNGM VGELVYGKAD IAIAPLTITL VREEVIDFSK PFMSLGISIM IKKPQKSKPG VFSFLDPLAY EIWMCIVFAY IGVSVV LFL VSRFSPYEWH TEEFEDGRET QSSESTNEFG IFNSLWFSLG AFMRQGCDIS PRSLSGRIVG GVWWFFTLII ISSYTAN LA AFLTVERMVS PIESAEDLSK QTEIAYGTLD SGSTKEFFRR SKIAVFDKMW TYMRSAEPSV FVRTTAEGVA RVRKSKGK Y AYLLESTMNE YIEQRKPCDT MKVGGNLDSK GYGIATPKGS SLGNAVNLAV LKLNEQGLLD KLKNKWWYDK GECGSGGGD SKEKTSALSL SNVAGVFYIL VGGLGLAMLV ALIEFCYKSR AEAKRMKVAK NPQNINPSSS QNSQNFATDY KDDDDKEGYN VYGIESVKI UniProtKB: Glutamate receptor 2 |
-分子 #2: Voltage-dependent calcium channel gamma-2 subunit
分子 | 名称: Voltage-dependent calcium channel gamma-2 subunit / タイプ: protein_or_peptide / ID: 2 / コピー数: 4 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 35.938746 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MGLFDRGVQM LLTTVGAFAA FSLMTIAVGT DYWLYSRGVC KTKSVSENET SKKNEEVMTH SGLWRTCCLE GNFKGLCKQI DHFPEDADY EADTAEYFLR AVRASSIFPI LSVILLFMGG LCIAASEFYK TRHNIILSAG IFFVSAGLSN IIGIIVYISA N AGDPSKSD ...文字列: MGLFDRGVQM LLTTVGAFAA FSLMTIAVGT DYWLYSRGVC KTKSVSENET SKKNEEVMTH SGLWRTCCLE GNFKGLCKQI DHFPEDADY EADTAEYFLR AVRASSIFPI LSVILLFMGG LCIAASEFYK TRHNIILSAG IFFVSAGLSN IIGIIVYISA N AGDPSKSD SKKNSYSYGW SFYFGALSFI IAEMVGVLAV HMFIDRHKQL RATARATDYL QASAITRIPS YRYRYQRRSR SS SRSTEPS HSRDASPVGV KGFNTLPSTE ISMYTLSRDP LKAATTPTAT YNSDRDNSFL QVHNCIQKDS KDSLHANTAN RRT TPV UniProtKB: Voltage-dependent calcium channel gamma-2 subunit |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
濃度 | 3 mg/mL | ||||||||||||
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緩衝液 | pH: 8 構成要素:
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凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 295 K |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: SUPER-RESOLUTION / 平均電子線量: 54.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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画像解析
-原子モデル構築 1
精密化 | 空間: REAL / プロトコル: RIGID BODY FIT |
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得られたモデル | ![]() PDB-5vot: |