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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 7t7x | |||||||||
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| タイトル | Munc13-1 C1-C2B-MUN-C2C Upright conformation spanning two lipid bilayers | |||||||||
要素 | Protein unc-13 homolog A | |||||||||
キーワード | EXOCYTOSIS / Synaptic Transmission / Munc13 / Membrane Fusion | |||||||||
| 機能・相同性 | 機能・相同性情報dense core granule priming / neuronal dense core vesicle exocytosis / regulation of calcium-dependent activation of synaptic vesicle fusion / diacylglycerol binding / synaptic vesicle maturation / synaptic vesicle docking / regulation of synaptic vesicle priming / positive regulation of vesicle fusion / positive regulation of dendrite extension / positive regulation of synaptic plasticity ...dense core granule priming / neuronal dense core vesicle exocytosis / regulation of calcium-dependent activation of synaptic vesicle fusion / diacylglycerol binding / synaptic vesicle maturation / synaptic vesicle docking / regulation of synaptic vesicle priming / positive regulation of vesicle fusion / positive regulation of dendrite extension / positive regulation of synaptic plasticity / positive regulation of glutamate receptor signaling pathway / regulation of short-term neuronal synaptic plasticity / neurotransmitter secretion / regulation of amyloid precursor protein catabolic process / innervation / presynaptic active zone / syntaxin binding / syntaxin-1 binding / Golgi-associated vesicle / spectrin binding / positive regulation of neurotransmitter secretion / SNARE complex assembly / neuromuscular junction development / synaptic vesicle priming / amyloid-beta metabolic process / synaptic vesicle exocytosis / excitatory synapse / calyx of Held / synaptic membrane / SNARE binding / neuromuscular junction / synaptic transmission, glutamatergic / phospholipid binding / terminal bouton / long-term synaptic potentiation / synaptic vesicle membrane / presynapse / presynaptic membrane / calmodulin binding / cell differentiation / neuron projection / protein domain specific binding / axon / calcium ion binding / synapse / protein-containing complex binding / glutamatergic synapse / protein-containing complex / zinc ion binding / identical protein binding / plasma membrane 類似検索 - 分子機能 | |||||||||
| 生物種 | ![]() | |||||||||
| 手法 | 電子顕微鏡法 / サブトモグラム平均法 / クライオ電子顕微鏡法 / 解像度: 10 Å | |||||||||
データ登録者 | Grushin, K. / Sindelar, C.V. | |||||||||
| 資金援助 | 米国, 2件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2022タイトル: Munc13 structural transitions and oligomers that may choreograph successive stages in vesicle priming for neurotransmitter release. 著者: Kirill Grushin / R Venkat Kalyana Sundaram / Charles V Sindelar / James E Rothman / ![]() 要旨: How can exactly six SNARE complexes be assembled under each synaptic vesicle? Here we report cryo-EM crystal structures of the core domain of Munc13, the key chaperone that initiates SNAREpin ...How can exactly six SNARE complexes be assembled under each synaptic vesicle? Here we report cryo-EM crystal structures of the core domain of Munc13, the key chaperone that initiates SNAREpin assembly. The functional core of Munc13, consisting of C1-C2B-MUN-C2C (Munc13C) spontaneously crystallizes between phosphatidylserine-rich bilayers in two distinct conformations, each in a radically different oligomeric state. In the open conformation (state 1), Munc13C forms upright trimers that link the two bilayers, separating them by ∼21 nm. In the closed conformation, six copies of Munc13C interact to form a lateral hexamer elevated ∼14 nm above the bilayer. Open and closed conformations differ only by a rigid body rotation around a flexible hinge, which when performed cooperatively assembles Munc13 into a lateral hexamer (state 2) in which the key SNARE assembly-activating site of Munc13 is autoinhibited by its neighbor. We propose that each Munc13 in the lateral hexamer ultimately assembles a single SNAREpin, explaining how only and exactly six SNARE complexes are templated. We suggest that state 1 and state 2 may represent two successive states in the synaptic vesicle supply chain leading to "primed" ready-release vesicles in which SNAREpins are clamped and ready to release (state 3). | |||||||||
| 履歴 |
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構造の表示
| ムービー |
ムービービューア |
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| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 7t7x.cif.gz | 382.4 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb7t7x.ent.gz | 312.9 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 7t7x.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/t7/7t7x ftp://data.pdbj.org/pub/pdb/validation_reports/t7/7t7x | HTTPS FTP |
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-関連構造データ
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
| #1: タンパク質 | 分子量: 130895.867 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) / 参照: UniProt: Q62768, UniProt: Q4KUS2 |
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-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
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| EM実験 | 試料の集合状態: 2D ARRAY / 3次元再構成法: サブトモグラム平均法 |
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試料調製
| 構成要素 | 名称: 2D crystal of Munc13-1 C1-C2B-MUN-C2C domains between two lipid bilayers. タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT | ||||||||||||||||||||
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| 分子量 | 値: 0.13 MDa / 実験値: NO | ||||||||||||||||||||
| 由来(天然) | 生物種: ![]() | ||||||||||||||||||||
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: ExpiHEK-293 | ||||||||||||||||||||
| 緩衝液 | pH: 7.4 | ||||||||||||||||||||
| 緩衝液成分 |
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| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 281 K / 詳細: blot for 5 sec before plunging, blot force -1 |
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電子顕微鏡撮影
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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| 顕微鏡 | モデル: FEI TITAN KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 5000 nm / 最小 デフォーカス(公称値): 3500 nm |
| 撮影 | 電子線照射量: 3.1 e/Å2 / Avg electron dose per subtomogram: 110 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
| 電子光学装置 | エネルギーフィルター名称: GIF Quantum LS / エネルギーフィルタースリット幅: 20 eV |
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解析
| EMソフトウェア |
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| CTF補正 | 詳細: CTF correction was performed during 3D reconstruction in RELION 3.1 タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
| 対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 10 Å / 解像度の算出法: OTHER / 粒子像の数: 126711 詳細: Combined map of best classes from two independent 3D classifications in RELION 3.1 of selected regions without angular searches using C3 symmetry expanded dataset (126711 subtomograms) and ...詳細: Combined map of best classes from two independent 3D classifications in RELION 3.1 of selected regions without angular searches using C3 symmetry expanded dataset (126711 subtomograms) and separation into 8 classes. 対称性のタイプ: POINT | ||||||||||||||||||||||||||||
| EM volume selection | 詳細: Particles were extracted and refined using Warp/M software Num. of tomograms: 62 / Num. of volumes extracted: 70467 | ||||||||||||||||||||||||||||
| 原子モデル構築 | プロトコル: FLEXIBLE FIT 詳細: Model for fitting was generated by AlphaFold using the construct's amino acid sequence. Flexible fitting into 3D map densities was performed using ISOLDE tool in ChimeraX. |
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万見について






米国, 2件
引用
UCSF Chimera














PDBj





Homo sapiens (ヒト)
