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- EMDB-61001: Structure of the human GluN1-N2B NMDA receptors in the Mg2+ free state -
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基本情報
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タイトル | Structure of the human GluN1-N2B NMDA receptors in the Mg2+ free state | ||||||||||||
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![]() | GluN1-N2B NMDA receptors / MEMBRANE PROTEIN | ||||||||||||
機能・相同性 | ![]() glycine-gated cation channel activity / excitatory chemical synaptic transmission / Activated NTRK2 signals through FYN / Synaptic adhesion-like molecules / response to glycine / propylene metabolic process / negative regulation of dendritic spine maintenance / regulation of monoatomic cation transmembrane transport / Assembly and cell surface presentation of NMDA receptors / NMDA glutamate receptor activity ...glycine-gated cation channel activity / excitatory chemical synaptic transmission / Activated NTRK2 signals through FYN / Synaptic adhesion-like molecules / response to glycine / propylene metabolic process / negative regulation of dendritic spine maintenance / regulation of monoatomic cation transmembrane transport / Assembly and cell surface presentation of NMDA receptors / NMDA glutamate receptor activity / Neurexins and neuroligins / neurotransmitter receptor complex / NMDA selective glutamate receptor complex / ligand-gated sodium channel activity / calcium ion transmembrane import into cytosol / glutamate receptor signaling pathway / glutamate binding / protein heterotetramerization / glycine binding / positive regulation of reactive oxygen species biosynthetic process / positive regulation of calcium ion transport into cytosol / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / monoatomic cation transmembrane transport / regulation of neuronal synaptic plasticity / Long-term potentiation / monoatomic cation transport / excitatory synapse / positive regulation of excitatory postsynaptic potential / monoatomic ion channel complex / synaptic cleft / calcium ion homeostasis / MECP2 regulates neuronal receptors and channels / glutamate-gated calcium ion channel activity / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / EPHB-mediated forward signaling / sodium ion transmembrane transport / Ras activation upon Ca2+ influx through NMDA receptor / ionotropic glutamate receptor signaling pathway / positive regulation of synaptic transmission, glutamatergic / regulation of membrane potential / excitatory postsynaptic potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / synaptic membrane / postsynaptic density membrane / terminal bouton / brain development / visual learning / calcium ion transmembrane transport / regulation of synaptic plasticity / long-term synaptic potentiation / late endosome / synaptic vesicle / signaling receptor activity / amyloid-beta binding / RAF/MAP kinase cascade / chemical synaptic transmission / dendritic spine / response to ethanol / postsynaptic membrane / cytoskeleton / learning or memory / lysosome / calmodulin binding / neuron projection / postsynaptic density / synapse / dendrite / calcium ion binding / endoplasmic reticulum membrane / protein-containing complex binding / cell surface / positive regulation of transcription by RNA polymerase II / zinc ion binding / plasma membrane / cytoplasm 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: 3.18 Å | ||||||||||||
![]() | Huang X / Sun X / Zhu S | ||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural insights into the diverse actions of magnesium on NMDA receptors. 著者: Xuejing Huang / Xiaole Sun / Qinrui Wang / Jilin Zhang / Han Wen / Wan-Jin Chen / Shujia Zhu / ![]() 要旨: Magnesium (Mg) is a key regulatory ion of N-methyl-ᴅ-aspartate (NMDA) receptors, including conferring them to function as coincidence detectors for excitatory synaptic transmission. However, the ...Magnesium (Mg) is a key regulatory ion of N-methyl-ᴅ-aspartate (NMDA) receptors, including conferring them to function as coincidence detectors for excitatory synaptic transmission. However, the structural basis underlying the Mg action on NMDA receptors remains unclear. Here, we report the cryo-EM structures of GluN1-N2B receptors and identify three distinct Mg-binding pockets. Specifically, site Ⅰ is located at the selectivity filter where an asparagine ring forms coordination bonds with Mg and is responsible for the voltage-dependent block. Sites Ⅱ and Ⅲ are located at the N-terminal domain (NTD) of the GluN2B subunit and involved in the allosteric potentiation and inhibition, respectively. Site Ⅱ consists of three acidic residues, and the combination of three mutations abolishes the GluN2B-specific Mg potentiation, while site Ⅲ overlaps with the Zn pocket, and mutations here significantly reduce the inhibition. Our study enhances the understanding of multifaceted roles of Mg in NMDA receptors and synaptic plasticity. | ||||||||||||
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その他 | ![]() ![]() | 118.2 MB 118.1 MB | ||
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-関連構造データ
関連構造データ | ![]() 9iyqMC ![]() 9iypC M: このマップから作成された原子モデル C: 同じ文献を引用 ( |
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投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.74 Å | ||||||||||||||||||||||||||||||||||||
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-ハーフマップ: #2
ファイル | emd_61001_half_map_1.map | ||||||||||||
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密度ヒストグラム |
-ハーフマップ: #1
ファイル | emd_61001_half_map_2.map | ||||||||||||
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試料の構成要素
-全体 : Human GluN1-N2B receptors in the Mg2+-free state
全体 | 名称: Human GluN1-N2B receptors in the Mg2+-free state |
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要素 |
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-超分子 #1: Human GluN1-N2B receptors in the Mg2+-free state
超分子 | 名称: Human GluN1-N2B receptors in the Mg2+-free state / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#2 |
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由来(天然) | 生物種: ![]() |
-分子 #1: Glutamate receptor ionotropic, NMDA 1
分子 | 名称: Glutamate receptor ionotropic, NMDA 1 / タイプ: protein_or_peptide / ID: 1 / コピー数: 2 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 95.236078 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MSTMRLLTLA LLFSCSVARA ACDPKIVNIG AVLSTRKHEQ MFREAVNQAN KRHGSWKIQL NATSVTHKPN AIQMALSVCE DLISSQVYA ILVSHPPTPN DHFTPTPVSY TAGFYRIPVL GLTTRMSIYS DKSIHLSFLR TVPPYSHQSS VWFEMMRVYS W NHIILLVS ...文字列: MSTMRLLTLA LLFSCSVARA ACDPKIVNIG AVLSTRKHEQ MFREAVNQAN KRHGSWKIQL NATSVTHKPN AIQMALSVCE DLISSQVYA ILVSHPPTPN DHFTPTPVSY TAGFYRIPVL GLTTRMSIYS DKSIHLSFLR TVPPYSHQSS VWFEMMRVYS W NHIILLVS DDHEGRAAQK RLETLLEERE SKAEKVLQFD PGTKNVTALL MEAKELEARV IILSASEDDA ATVYRAAAML NM TGSGYVW LVGEREISGN ALRYAPDGIL GLQLINGKNE SAHISDAVGV VAQAVHELLE KENITDPPRG CVGNTNIWKT GPL FKRVLM SSKYADGVTG RVEFNEDGDR KFANYSIMNL QNRKLVQVGI YNGTHVIPND RKIIWPGGET EKPRGYQMST RLKI VTIHQ EPFVYVKPTL SDGTCKEEFT VNGDPVKKVI CTGPNDTSPG SPRHTVPQCC YGFCIDLLIK LARTMNFTYE VHLVA DGKF GTQERVNNSN KKEWNGMMGE LLSGQADMIV APLTINNERA QYIEFSKPFK YQGLTILVKK EIPRSTLDSF MQPFQS TLW LLVGLSVHVV AVMLYLLDRF SPFGRFKVNS EEEEEDALTL SSAMWFSWGV LLNSGIGEGA PRSFSARILG MVWAGFA MI IVASYTANLA AFLVLDRPEE RITGINDPRL RNPSDKFIYA TVKQSSVDIY FRRQVELSTM YRHMEKHNYE SAAEAIQA V RDNKLHAFIW DSAVLEFEAS QKCDLVTTGE LFFRSGFGIG MRKDSPWKQN VSLSILKSHE NGFMEDLDKT WVRYQECDS RSNAPATLTF ENMAGVFMLV AGGIVAGIFL IFIEIAYKRH KDARRKQ UniProtKB: Glutamate receptor ionotropic, NMDA 1 |
-分子 #2: Glutamate receptor ionotropic, NMDA 2B
分子 | 名称: Glutamate receptor ionotropic, NMDA 2B / タイプ: protein_or_peptide / ID: 2 / コピー数: 2 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 94.365008 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MKPRAECCSP KFWLVLAVLA VSGSRARSQK SPPSIGIAVI LVGTSDEVAI KDAHEKDDFH HLSVVPRVEL VAMNETDPKS IITRICDLM SDRKIQGVVF ADDTDQEAIA QILDFISAQT LTPILGIHGG SSMIMADKDE SSMFFQFGPS IEQQASVMLN I MEEYDWYI ...文字列: MKPRAECCSP KFWLVLAVLA VSGSRARSQK SPPSIGIAVI LVGTSDEVAI KDAHEKDDFH HLSVVPRVEL VAMNETDPKS IITRICDLM SDRKIQGVVF ADDTDQEAIA QILDFISAQT LTPILGIHGG SSMIMADKDE SSMFFQFGPS IEQQASVMLN I MEEYDWYI FSIVTTYFPG YQDFVNKIRS TIENSFVGWE LEEVLLLDMS LDDGDSKIQN QLKKLQSPII LLYCTKEEAT YI FEVANSV GLTGYGYTWI VPSLVAGDTD TVPAEFPTGL ISVSYDEWDY GLPARVRDGI AIITTAASDM LSEHSFIPEP KSS CYNTHE KRIYQSNMLN RYLINVTFEG RNLSFSEDGY QMHPKLVIIL LNKERKWERV GKWKDKSLQM KYYVWPRMCP ETEE QEDDH LSIVTLEEAP FVIVESVDPL SGTCMRNTVP CQKRIVTENK TDEEPGYIKK CCKGFCIDIL KKISKSVKFT YDLYL VTNG KHGKKINGTW NGMIGEVVMK RAYMAVGSLT INEERSEVVD FSVPFIETGI SVMVSRSNGT VSPSAFLEPF SADVWV MMF VMLLIVSAVA VFVFEYFSPV GYNRCLADGR EPGGPSFTIG KAIWLLWGLV FNNSVPVQNP KGTTSKIMVS VWAFFAV IF LASYTANLAA FMIQEEYVDQ VSGLSDKKFQ RPNDFSPPFR FGTVPNGSTE RNIRNNYAEM HAYMGKFNQR GVDDALLS L KTGKLDAFIY DAAVLNYMAG RDEGCKLVTI GSGKVFASTG YGIAIQKDSG WKRQVDLAIL QLFGDGEMEE LEALWLTGI CHNEKNEVMS SQLDIDNMAG VFYMLGAAMA LSLITFICEH LF UniProtKB: Glutamate receptor ionotropic, NMDA 2B |
-分子 #3: GLYCINE
分子 | 名称: GLYCINE / タイプ: ligand / ID: 3 / コピー数: 2 / 式: GLY |
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分子量 | 理論値: 75.067 Da |
Chemical component information | ![]() ChemComp-GLY: |
-分子 #4: 2-acetamido-2-deoxy-beta-D-glucopyranose
分子 | 名称: 2-acetamido-2-deoxy-beta-D-glucopyranose / タイプ: ligand / ID: 4 / コピー数: 8 / 式: NAG |
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分子量 | 理論値: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-分子 #5: (2R)-4-(3-phosphonopropyl)piperazine-2-carboxylic acid
分子 | 名称: (2R)-4-(3-phosphonopropyl)piperazine-2-carboxylic acid タイプ: ligand / ID: 5 / コピー数: 2 / 式: 7RC |
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分子量 | 理論値: 252.205 Da |
Chemical component information | ![]() ChemComp-7RC: |
-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 | cell |
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試料調製
緩衝液 | pH: 8 |
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凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | TFS KRIOS |
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撮影 | フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 平均電子線量: 53.0 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 / 最大 デフォーカス(公称値): 1.6 µm / 最小 デフォーカス(公称値): 1.0 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |