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基本情報
登録情報 | データベース: PDB / ID: 7yv9 | ||||||
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タイトル | Cryo-EM structure of full-length Myosin Va in the autoinhibited state | ||||||
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![]() | MOTOR PROTEIN / intracellular trafficking / molecular motor / myosin / autoinhibition | ||||||
機能・相同性 | ![]() CaMK IV-mediated phosphorylation of CREB / Cam-PDE 1 activation / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Glycogen breakdown (glycogenolysis) / Activation of RAC1 downstream of NMDARs / Reduction of cytosolic Ca++ levels / Sodium/Calcium exchangers / Activation of Ca-permeable Kainate Receptor / CLEC7A (Dectin-1) induces NFAT activation / Synthesis of IP3 and IP4 in the cytosol ...CaMK IV-mediated phosphorylation of CREB / Cam-PDE 1 activation / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Glycogen breakdown (glycogenolysis) / Activation of RAC1 downstream of NMDARs / Reduction of cytosolic Ca++ levels / Sodium/Calcium exchangers / Activation of Ca-permeable Kainate Receptor / CLEC7A (Dectin-1) induces NFAT activation / Synthesis of IP3 and IP4 in the cytosol / RHO GTPases activate PAKs / Calmodulin induced events / Inactivation, recovery and regulation of the phototransduction cascade / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / Calcineurin activates NFAT / eNOS activation / Ion transport by P-type ATPases / Unblocking of NMDA receptors, glutamate binding and activation / Protein methylation / RAF activation / VEGFR2 mediated vascular permeability / RAS processing / Smooth Muscle Contraction / Ca2+ pathway / FCERI mediated Ca+2 mobilization / RHO GTPases activate IQGAPs / Extra-nuclear estrogen signaling / RAF/MAP kinase cascade / PKA activation / Platelet degranulation / Stimuli-sensing channels / Ion homeostasis / type 3 metabotropic glutamate receptor binding / myosin complex / organelle localization by membrane tethering / regulation of cardiac muscle cell action potential / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / nitric-oxide synthase binding / protein phosphatase activator activity / cytoskeletal motor activity / adenylate cyclase binding / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / negative regulation of ryanodine-sensitive calcium-release channel activity / calcium channel inhibitor activity / cellular response to interferon-beta / phosphatidylinositol 3-kinase binding / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / positive regulation of protein dephosphorylation / regulation of ryanodine-sensitive calcium-release channel activity / titin binding / voltage-gated potassium channel complex / sperm midpiece / calcium channel complex / adenylate cyclase activator activity / nitric-oxide synthase regulator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / regulation of cytokinesis / positive regulation of receptor signaling pathway via JAK-STAT / spindle microtubule / cellular response to type II interferon / spindle pole / G2/M transition of mitotic cell cycle / calcium-dependent protein binding / myelin sheath / actin binding / growth cone / transmembrane transporter binding / protein domain specific binding / centrosome / calcium ion binding / protein kinase binding / nucleoplasm / ATP binding / cytoplasm / cytosol 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: 4.78 Å | ||||||
![]() | Niu, F. / Wei, Z. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Autoinhibition and activation mechanisms revealed by the triangular-shaped structure of myosin Va. 著者: Fengfeng Niu / Yong Liu / Kang Sun / Shun Xu / Jiayuan Dong / Cong Yu / Kaige Yan / Zhiyi Wei / ![]() 要旨: As the prototype of unconventional myosin motor family, myosin Va (MyoVa) transport cellular cargos along actin filaments in diverse cellular processes. The off-duty MyoVa adopts a closed and ...As the prototype of unconventional myosin motor family, myosin Va (MyoVa) transport cellular cargos along actin filaments in diverse cellular processes. The off-duty MyoVa adopts a closed and autoinhibited state, which can be relieved by cargo binding. The molecular mechanisms governing the autoinhibition and activation of MyoVa remain unclear. Here, we report the cryo-electron microscopy structure of the two full-length, closed MyoVa heavy chains in complex with 12 calmodulin light chains at 4.78-Å resolution. The MyoVa adopts a triangular structure with multiple intra- and interpolypeptide chain interactions in establishing the closed state with cargo binding and adenosine triphosphatase activity inhibited. Structural, biochemical, and cellular analyses uncover an asymmetric autoinhibition mechanism, in which the cargo-binding sites in the two MyoVa heavy chains are differently protected. Thus, specific and efficient MyoVa activation requires coincident binding of multiple cargo adaptors, revealing an intricate and elegant activity regulation of the motor in response to cargos. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 920.6 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.5 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.6 MB | 表示 | |
XML形式データ | ![]() | 137.5 KB | 表示 | |
CIF形式データ | ![]() | 201.1 KB | 表示 | |
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 | ![]() 34121MC M: このデータのモデリングに利用したマップデータ 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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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 212657.359 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: D3YZ62 #2: タンパク質 | 分子量: 16848.605 Da / 分子数: 12 / Mutation: E32Q,E68Q,E105Q,E141Q / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: P0DP26 |
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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: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Myosin Va and Calmodulin complex / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT | ||||||||||||||||||||||||||||||
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分子量 | 値: 0.63 MDa / 実験値: NO | ||||||||||||||||||||||||||||||
由来(天然) | 生物種: ![]() ![]() | ||||||||||||||||||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||||||||||||||||||||
緩衝液 | pH: 7.4 | ||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのタイプ: Quantifoil R1.2/1.3 | ||||||||||||||||||||||||||||||
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: 277 K |
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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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 81000 X / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1500 nm / Cs: 2.7 mm / アライメント法: BASIC |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 2 sec. / 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 20747000 | ||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.78 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 160273 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 167.3 / プロトコル: OTHER / 空間: REAL / Target criteria: Correlation coefficient | ||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 |
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