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基本情報
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タイトル | Cryo-EM structure of a synaptobrevin-Munc18-1-syntaxin-1 complex class 2 | |||||||||||||||||||||
![]() | Cryo-EM map of synaptobrevin-Munc18-1-syntaxin-1 complex, conformation 1 | |||||||||||||||||||||
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![]() | Munc18 / syntaxin / synaptobrevin / SNARE / membrane fusion / neurotransmitter release / EXOCYTOSIS | |||||||||||||||||||||
機能・相同性 | ![]() positive regulation of vesicle docking / regulation of acrosomal vesicle exocytosis / positive regulation of glutamate secretion, neurotransmission / negative regulation of SNARE complex assembly / developmental process involved in reproduction / axon target recognition / exocytic insertion of neurotransmitter receptor to postsynaptic membrane / trans-Golgi Network Vesicle Budding / regulation of vesicle fusion / regulation of delayed rectifier potassium channel activity ...positive regulation of vesicle docking / regulation of acrosomal vesicle exocytosis / positive regulation of glutamate secretion, neurotransmission / negative regulation of SNARE complex assembly / developmental process involved in reproduction / axon target recognition / exocytic insertion of neurotransmitter receptor to postsynaptic membrane / trans-Golgi Network Vesicle Budding / regulation of vesicle fusion / regulation of delayed rectifier potassium channel activity / myosin head/neck binding / Other interleukin signaling / presynaptic dense core vesicle exocytosis / synaptobrevin 2-SNAP-25-syntaxin-1a-complexin I complex / synaptobrevin 2-SNAP-25-syntaxin-1a-complexin II complex / synaptobrevin 2-SNAP-25-syntaxin-1a complex / Glutamate Neurotransmitter Release Cycle / Norepinephrine Neurotransmitter Release Cycle / Acetylcholine Neurotransmitter Release Cycle / Serotonin Neurotransmitter Release Cycle / GABA synthesis, release, reuptake and degradation / Lysosome Vesicle Biogenesis / regulated exocytosis / Dopamine Neurotransmitter Release Cycle / extrinsic component of presynaptic membrane / positive regulation of norepinephrine secretion / positive regulation of catecholamine secretion / synaptic vesicle docking / negative regulation of synaptic transmission, GABAergic / zymogen granule membrane / regulation of synaptic vesicle priming / Golgi Associated Vesicle Biogenesis / storage vacuole / platelet degranulation / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / response to gravity / vesicle-mediated transport in synapse / synaptic vesicle maturation / positive regulation of calcium ion-dependent exocytosis / vesicle docking / eosinophil degranulation / presynaptic active zone cytoplasmic component / regulation of exocytosis / secretion by cell / SNAP receptor activity / SNARE complex / chloride channel inhibitor activity / vesicle fusion / positive regulation of mast cell degranulation / regulation of vesicle-mediated transport / calcium-ion regulated exocytosis / Cargo recognition for clathrin-mediated endocytosis / LGI-ADAM interactions / Clathrin-mediated endocytosis / actomyosin / positive regulation of intracellular protein transport / hormone secretion / neuromuscular synaptic transmission / platelet alpha granule / Golgi to plasma membrane protein transport / neurotransmitter secretion / ATP-dependent protein binding / neuron projection terminus / vesicle docking involved in exocytosis / protein localization to membrane / syntaxin binding / regulation of synaptic vesicle recycling / syntaxin-1 binding / long-term synaptic depression / clathrin-coated vesicle / insulin secretion / SNARE complex assembly / positive regulation of neurotransmitter secretion / neurotransmitter transport / synaptic vesicle priming / myosin binding / parallel fiber to Purkinje cell synapse / exocytosis / phospholipase binding / modulation of excitatory postsynaptic potential / positive regulation of exocytosis / synaptic vesicle exocytosis / protein sumoylation / synaptic vesicle endocytosis / postsynaptic cytosol / positive regulation of excitatory postsynaptic potential / negative regulation of protein-containing complex assembly / presynaptic cytosol / calcium channel inhibitor activity / response to glucose / vesicle-mediated transport / phagocytic vesicle / presynaptic active zone membrane / endomembrane system / cytoplasmic vesicle membrane / SNARE binding / acrosomal vesicle / secretory granule / protein localization to plasma membrane / establishment of localization in cell 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: 3.5 Å | |||||||||||||||||||||
![]() | Rizo J / Bai X / Stepien KP / Xu J / Zhang X | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: SNARE assembly enlightened by cryo-EM structures of a synaptobrevin-Munc18-1-syntaxin-1 complex. 著者: Karolina P Stepien / Junjie Xu / Xuewu Zhang / Xiao-Chen Bai / Josep Rizo / ![]() 要旨: Munc18-1 forms a template to organize assembly of the neuronal SNARE complex that triggers neurotransmitter release, binding first to a closed conformation of syntaxin-1 where its amino-terminal ...Munc18-1 forms a template to organize assembly of the neuronal SNARE complex that triggers neurotransmitter release, binding first to a closed conformation of syntaxin-1 where its amino-terminal region interacts with the SNARE motif, and later binding to synaptobrevin. However, the mechanism of SNARE complex assembly remains unclear. Here, we report two cryo-EM structures of Munc18-1 bound to cross-linked syntaxin-1 and synaptobrevin. The structures allow visualization of how syntaxin-1 opens and reveal how part of the syntaxin-1 amino-terminal region can help nucleate interactions between the amino termini of the syntaxin-1 and synaptobrevin SNARE motifs, while their carboxyl termini bind to distal sites of Munc18-1. These observations, together with mutagenesis, SNARE complex assembly experiments, and fusion assays with reconstituted proteoliposomes, support a model whereby these interactions are critical to initiate SNARE complex assembly and multiple energy barriers enable diverse mechanisms for exquisite regulation of neurotransmitter release. | |||||||||||||||||||||
履歴 |
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 14.6 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 24.3 KB 24.3 KB | 表示 表示 | ![]() |
画像 | ![]() | 153.4 KB | ||
Filedesc metadata | ![]() | 7.4 KB | ||
その他 | ![]() ![]() | 17 MB 17 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 7udbMC ![]() 7udcC 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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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
EMDBのページ | ![]() ![]() |
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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 | Cryo-EM map of synaptobrevin-Munc18-1-syntaxin-1 complex, conformation 1 | ||||||||||||||||||||||||||||||||||||
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: 1.08 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-ハーフマップ: Cryo-EM map of synaptobrevin-Munc18-1-syntaxin-1 complex, conformation 1, unfiltered...
ファイル | emd_26455_half_map_1.map | ||||||||||||
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注釈 | Cryo-EM map of synaptobrevin-Munc18-1-syntaxin-1 complex, conformation 1, unfiltered half map 2 | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: Cryo-EM map of synaptobrevin-Munc18-1-syntaxin-1 complex, conformation 1, unfiltered...
ファイル | emd_26455_half_map_2.map | ||||||||||||
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注釈 | Cryo-EM map of synaptobrevin-Munc18-1-syntaxin-1 complex, conformation 1, unfiltered half map 1 | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : ternary complex of Munc18-1 bound to syntaxin-1A and a SNARE moti...
全体 | 名称: ternary complex of Munc18-1 bound to syntaxin-1A and a SNARE motif of synaptobrevin 2 |
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要素 |
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-超分子 #1: ternary complex of Munc18-1 bound to syntaxin-1A and a SNARE moti...
超分子 | 名称: ternary complex of Munc18-1 bound to syntaxin-1A and a SNARE motif of synaptobrevin 2 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: Syntaxin-binding protein 1
分子 | 名称: Syntaxin-binding protein 1 / タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 68.714883 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: GSPGISGGGG GIHMAPIGLK AVVGEKIMHD VIKKVKKKGE WKVLVVDQLS MRMLSSCCKM TDIMTEGITI VEDINKRREP LPSLEAVYL ITPSEKSVHS LISDFKDPPT AKYRAAHVFF TDSCPDALFN ELVKSRAAKV IKTLTEINIA FLPYESQVYS L DSADSFQS ...文字列: GSPGISGGGG GIHMAPIGLK AVVGEKIMHD VIKKVKKKGE WKVLVVDQLS MRMLSSCCKM TDIMTEGITI VEDINKRREP LPSLEAVYL ITPSEKSVHS LISDFKDPPT AKYRAAHVFF TDSCPDALFN ELVKSRAAKV IKTLTEINIA FLPYESQVYS L DSADSFQS FYSPHKAQMK NPILERLAEQ IATLCATLKE YPAVRYRGEY KDNALLAQLI QDKLDAYKAD DPTMGEGPDK AR SQLLILD RGFDPSSPVL HELTFQAMSY DLLPIENDVY KYETSGIGEA RVKEVLLDED DDLWIALRHK HIAEVSQEVT RSL KDFSSS KRMNTGEKTT MRKLSQMLKK MPQYQKELSK YSTHLHLAED CMKHYQGTVD KLCRVEQDLA MGTDAEGEKI KDPM RAIVP ILLDANVSTY DKIRIILLYI FLKNGITEEN LNKLIQHAQI PPEDSEIITN MAHLGVPIVT DSTLRRRSKP ERKER ISEQ TYQLSRWTPI IKDIMEDTIE DKLDTKHYPY ISTRSSASFS TTAVSARYGH WHKNKAPGEY RSGPRLIIFI LGGVSL NEM RCAYEVTQAN GKWEVLIGST HILTPQKLLD TLKKLNKTDE EISS UniProtKB: Syntaxin-binding protein 1 |
-分子 #2: Syntaxin-1A
分子 | 名称: Syntaxin-1A / タイプ: protein_or_peptide / ID: 2 詳細: An 8 residue polyalanine stretch was modeled between I149 and A178 of chain B entity Syntaxin-1A. Side chains in this region were not visible and residue numbers are tentative. While ...詳細: An 8 residue polyalanine stretch was modeled between I149 and A178 of chain B entity Syntaxin-1A. Side chains in this region were not visible and residue numbers are tentative. While processing in OneDep the polyalanine sequence was updated to 162-SEEAADML-169 コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 29.221541 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: GSKDRTQELR TAKDSDDDDD VTVTVDRDRF MDEFFEQVEE IRGFIDKIAE NVEEVKRKHS AILASPNPDE KTKEELEELM SDIKKTANK VRSKLKSIEQ SIEQEEGLNR SSADLRIRKT QHSTLSRKFV EVMSEYNATQ SDYRERAKGR IQRQLEITGR T TTSEEAAD ...文字列: GSKDRTQELR TAKDSDDDDD VTVTVDRDRF MDEFFEQVEE IRGFIDKIAE NVEEVKRKHS AILASPNPDE KTKEELEELM SDIKKTANK VRSKLKSIEQ SIEQEEGLNR SSADLRIRKT QHSTLSRKFV EVMSEYNATQ SDYRERAKGR IQRQLEITGR T TTSEEAAD MLESGNPAIF ASGIIMDSSI SKQALSEIET RHSEIIKCEN SIRELHDMFM DMAMLVESQG EMIDRIEYNV EH AVDYVER AVSDTKK UniProtKB: Syntaxin-1A |
-分子 #3: Synaptobrevin-2
分子 | 名称: Synaptobrevin-2 / タイプ: protein_or_peptide / ID: 3 / コピー数: 1 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 6.645386 KDa |
組換発現 | 生物種: ![]() ![]() |
配列 | 文字列: GSMWNRRLQQ TCAQVDEVVD IMRVNVDKVL ERDQKLSELD DRADALQAGA SQFETSAAK UniProtKB: Vesicle-associated membrane protein 2 |
-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 | 7.5 mg/mL |
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緩衝液 | pH: 7 |
グリッド | モデル: Quantifoil R1.2/1.3 / 材質: GOLD / メッシュ: 300 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: HOLEY / 前処理 - タイプ: GLOW DISCHARGE |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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特殊光学系 | エネルギーフィルター - 名称: GIF Bioquantum / エネルギーフィルター - スリット幅: 20 eV |
撮影 | フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) 検出モード: SUPER-RESOLUTION / 実像数: 7401 / 平均電子線量: 60.0 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): 2.6 µm / 最小 デフォーカス(公称値): 1.6 µm |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER ホルダー冷却材: NITROGEN |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |