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基本情報
登録情報 | データベース: PDB / ID: 9cfu | |||||||||
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タイトル | Cryo-EM structure of myosin-1c bound to F-actin in the ADP-A state | |||||||||
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![]() | MOTOR PROTEIN / F-actin / myosin / myosin-1c / cellular motility / cryo-EM / actomyosin. / STRUCTURAL PROTEIN | |||||||||
機能・相同性 | ![]() positive regulation of cellular response to insulin stimulus / stereocilium membrane / B-WICH complex positively regulates rRNA expression / 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 ...positive regulation of cellular response to insulin stimulus / stereocilium membrane / B-WICH complex positively regulates rRNA expression / 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 / 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 / Protein methylation / RAF activation / VEGFR2 mediated vascular permeability / vesicle transport along actin filament / RAS processing / FCERI mediated Ca+2 mobilization / Ca2+ pathway / RHO GTPases activate IQGAPs / Extra-nuclear estrogen signaling / RAF/MAP kinase cascade / PKA activation / Smooth Muscle Contraction / Regulation of actin dynamics for phagocytic cup formation / Platelet degranulation / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Stimuli-sensing channels / B-WICH complex / stereocilium / Ion homeostasis / protein targeting to membrane / myosin complex / vascular endothelial growth factor signaling pathway / positive regulation of transcription by RNA polymerase III / cytoskeletal motor activator activity / regulation of bicellular tight junction assembly / organelle localization by membrane tethering / 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 / positive regulation of transcription by RNA polymerase I / negative regulation of ryanodine-sensitive calcium-release channel activity / troponin I binding / filamentous actin / calcineurin-mediated signaling / mesenchyme migration / actin filament bundle / brush border / microvillus / actin filament bundle assembly / skeletal muscle myofibril / striated muscle thin filament / protein phosphatase activator activity / adenylate cyclase binding / regulation of ryanodine-sensitive calcium-release channel activity / skeletal muscle thin filament assembly / actin monomer binding / positive regulation of protein targeting to membrane / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / lateral plasma membrane / 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 / phagocytic vesicle / titin binding / voltage-gated potassium channel complex / actin filament polymerization / sperm midpiece / calcium channel complex / calyx of Held / cytoplasmic vesicle membrane / adenylate cyclase activator activity / regulation of heart rate / protein serine/threonine kinase activator activity / sarcomere / regulation of cytokinesis / basal plasma membrane / positive regulation of receptor signaling pathway via JAK-STAT / filopodium / spindle microtubule / actin filament / phospholipid binding 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() ![]() | |||||||||
手法 | 電子顕微鏡法 / らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 2.8 Å | |||||||||
![]() | Chavali, S.S. / Sindelar, C.V. / Ostap, M.E. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: High-resolution structures of Myosin-IC reveal a unique actin-binding orientation, ADP release pathway, and power stroke trajectory. 著者: Sai Shashank Chavali / Peter J Carman / Henry Shuman / E Michael Ostap / Charles V Sindelar / ![]() 要旨: Myosin-IC (myo1c) is a class-I myosin that supports transport and remodeling of the plasma membrane and membrane-bound vesicles. Like other members of the myosin family, its biochemical kinetics are ...Myosin-IC (myo1c) is a class-I myosin that supports transport and remodeling of the plasma membrane and membrane-bound vesicles. Like other members of the myosin family, its biochemical kinetics are altered in response to changes in mechanical loads that resist the power stroke. However, myo1c is unique in that the primary force-sensitive kinetic transition is the isomerization that follows ATP binding, not ADP release as in other slow myosins. Myo1c also powers actin gliding along curved paths, propelling actin filaments in leftward circles. To understand the origins of this unique force-sensing and motile behavior, we solved actin-bound myo1c cryo-EM structures in the presence and absence of ADP. Our structures reveal that in contrast with other myosins, the myo1c lever arm swing is skewed, partly due to a different actin interface that reorients the motor domain on actin. The structures also reveal unique nucleotide-dependent behavior of both the nucleotide pocket as well as an element called the N-terminal extension (NTE). We incorporate these observations into a model that explains why force primarily regulates ATP binding in myo1c, rather than ADP release as in other myosins. Integrating our cryo-EM data with available crystallography structures allows the modeling of full-length myo1c during force generation, supplying insights into its role in membrane remodeling. These results highlight how relatively minor sequence differences in members of the myosin superfamily can significantly alter power stroke geometry and force-sensing properties, with important implications for biological function. | |||||||||
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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 | ![]() | 398.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 318.4 KB | 表示 | ![]() |
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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
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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: 41862.613 Da / 分子数: 3 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() 参照: UniProt: P68135, 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 #2: タンパク質 | | 分子量: 92064.203 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #3: タンパク質 | | 分子量: 16723.365 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #4: 化合物 | ChemComp-ADP / #5: 化合物 | ChemComp-MG / 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
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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: FILAMENT / 3次元再構成法: らせん対称体再構成法 |
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試料調製
構成要素 | 名称: Complex of myosin-1c with F-actin / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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分子量 | 値: 0.22 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 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
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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 / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 52 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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らせん対称 | 回転角度/サブユニット: -167.687 ° / 軸方向距離/サブユニット: 28.266 Å / らせん対称軸の対称性: C1 |
3次元再構成 | 解像度: 2.8 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 671620 / 対称性のタイプ: HELICAL |