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基本情報
登録情報 | データベース: PDB / ID: 8of8 | ||||||||||||||||||
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タイトル | Cryo-EM structure of actomyosin-5a-S1 with the full-length lever (nucleotide free) | ||||||||||||||||||
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![]() | MOTOR PROTEIN / myosin / cytoskeletal motor / myosin-va / myo5a / myosin-5a / S1 / rigor / nucleotide free / apo / lever / 6IQ / actomyosin / actomyosin-5a / actin / actomyosin-va / actin bound | ||||||||||||||||||
機能・相同性 | ![]() establishment of endoplasmic reticulum localization to postsynapse / regulation of postsynaptic cytosolic calcium ion concentration / 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 / melanosome localization / endoplasmic reticulum localization / Reduction of cytosolic Ca++ levels ...establishment of endoplasmic reticulum localization to postsynapse / regulation of postsynaptic cytosolic calcium ion concentration / 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 / melanosome localization / endoplasmic reticulum localization / Reduction of cytosolic Ca++ levels / Sodium/Calcium exchangers / Activation of Ca-permeable Kainate Receptor / Synthesis of IP3 and IP4 in the cytosol / CLEC7A (Dectin-1) induces NFAT activation / RHO GTPases activate PAKs / Calmodulin induced events / Inactivation, recovery and regulation of the phototransduction cascade / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / eNOS activation / Ion transport by P-type ATPases / Calcineurin activates NFAT / Unblocking of NMDA receptors, glutamate binding and activation / locomotion involved in locomotory behavior / Protein methylation / melanin metabolic process / RAF activation / VEGFR2 mediated vascular permeability / vesicle transport along actin filament / RAS processing / unconventional myosin complex / FCERI mediated Ca+2 mobilization / Ca2+ pathway / insulin-responsive compartment / RHO GTPases activate IQGAPs / Extra-nuclear estrogen signaling / RAF/MAP kinase cascade / PKA activation / developmental pigmentation / melanosome transport / secretory granule localization / Smooth Muscle Contraction / Regulation of MITF-M-dependent genes involved in pigmentation / Regulation of actin dynamics for phagocytic cup formation / actin filament-based movement / melanin biosynthetic process / hair follicle maturation / Platelet degranulation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / melanocyte differentiation / actomyosin / Stimuli-sensing channels / Ion homeostasis / long-chain fatty acid biosynthetic process / myosin complex / insulin secretion / odontogenesis / intermediate filament / cytoskeletal motor activator activity / organelle localization by membrane tethering / pigmentation / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / microfilament motor activity / myosin heavy chain binding / presynaptic endocytosis / regulation of cardiac muscle cell action potential / tropomyosin binding / negative regulation of ryanodine-sensitive calcium-release channel activity / troponin I binding / filamentous actin / mesenchyme migration / calcineurin-mediated signaling / exocytosis / actin filament bundle / cytoskeletal motor activity / actin filament bundle assembly / skeletal muscle myofibril / striated muscle thin filament / protein phosphatase activator activity / regulation of ryanodine-sensitive calcium-release channel activity / skeletal muscle thin filament assembly / adenylate cyclase binding / actin monomer binding / catalytic complex / photoreceptor outer segment / detection of calcium ion / regulation of cardiac muscle contraction / smooth endoplasmic reticulum / calcium channel inhibitor activity / cellular response to interferon-beta / stress fiber / skeletal muscle fiber development / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / vesicle-mediated transport / titin binding / voltage-gated potassium channel complex / actin filament polymerization / sperm midpiece / myelination / calcium channel complex 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: 7.5 Å | ||||||||||||||||||
![]() | Gravett, M.S.C. / Klebl, D.P. / Harlen, O.G. / Read, D.J. / Harris, S.A. / Muench, S.P. / Peckham, M. | ||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Exploiting cryo-EM structures of actomyosin-5a to reveal the physical properties of its lever. 著者: Molly S C Gravett / David P Klebl / Oliver G Harlen / Daniel J Read / Stephen P Muench / Sarah A Harris / Michelle Peckham / ![]() 要旨: Myosin 5a (Myo5a) is a dimeric processive motor protein that transports cellular cargos along filamentous actin (F-actin). Its long lever is responsible for its large power-stroke, step size, and ...Myosin 5a (Myo5a) is a dimeric processive motor protein that transports cellular cargos along filamentous actin (F-actin). Its long lever is responsible for its large power-stroke, step size, and load-bearing ability. Little is known about the levers' structure and physical properties, and how they contribute to walking mechanics. Using cryoelectron microscopy (cryo-EM) and molecular dynamics (MD) simulations, we resolved the structure of monomeric Myo5a, comprising the motor domain and full-length lever, bound to F-actin. The range of its lever conformations revealed its physical properties, how stiffness varies along its length and predicts a large, 35 nm, working stroke. Thus, the newly released trail head in a dimeric Myo5a would only need to perform a small diffusive search for its new binding site on F-actin, and stress would only be generated across the dimer once phosphate is released from the lead head, revealing new insight into the walking behavior of Myo5a. | ||||||||||||||||||
履歴 |
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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 | ![]() | 410 KB | 表示 | ![]() |
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PDB形式 | ![]() | 282.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 16850MC 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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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: 16721.350 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: P0DP26 #2: タンパク質 | 分子量: 41875.633 Da / 分子数: 3 / 由来タイプ: 天然 / 詳細: HIC is tele-methylhistidine / 由来: (天然) ![]() ![]() #3: タンパク質 | | 分子量: 106596.195 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: Q99104 研究の焦点であるリガンドがあるか | N | Has protein modification | Y | |
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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: HELICAL ARRAY / 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 |
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分子量 |
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由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 7 | |||||||||||||||||||||||||||||||||||
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 詳細: 5.26 mg/mL Actin, alpha skeletal muscle 266 mg/mL FlAG-tagged unconventional myosin-Va (residues 1-907) 84.2 mg/mL Calmodulin-1 | |||||||||||||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R2/2 | |||||||||||||||||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 80 % / 凍結前の試料温度: 281.15 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: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 75000 X / 最大 デフォーカス(公称値): 3600 nm / 最小 デフォーカス(公称値): 1800 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: COMA FREE |
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: 1.5 sec. / 電子線照射量: 63.13 e/Å2 / 検出モード: INTEGRATING フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 撮影したグリッド数: 1 / 実像数: 4285 |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 838213 | |||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | |||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 7.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 22337 / アルゴリズム: FOURIER SPACE / クラス平均像の数: 1 / 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL | |||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1
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