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基本情報
登録情報 | データベース: PDB / ID: 3j8y | ||||||
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タイトル | High-resolution structure of ATP analog-bound kinesin on microtubules | ||||||
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![]() | MOTOR PROTEIN/STRUCTURAL PROTEIN / molecular motors / kinesin / myosin / microtubules / cytoskeletal motors / MOTOR PROTEIN-STRUCTURAL PROTEIN complex | ||||||
機能・相同性 | ![]() regulation of modification of synapse structure, modulating synaptic transmission / plus-end-directed vesicle transport along microtubule / cytoplasm organization / cytolytic granule membrane / anterograde dendritic transport of neurotransmitter receptor complex / anterograde neuronal dense core vesicle transport / mitocytosis / retrograde neuronal dense core vesicle transport / anterograde axonal protein transport / ciliary rootlet ...regulation of modification of synapse structure, modulating synaptic transmission / plus-end-directed vesicle transport along microtubule / cytoplasm organization / cytolytic granule membrane / anterograde dendritic transport of neurotransmitter receptor complex / anterograde neuronal dense core vesicle transport / mitocytosis / retrograde neuronal dense core vesicle transport / anterograde axonal protein transport / ciliary rootlet / lysosome localization / positive regulation of potassium ion transport / plus-end-directed microtubule motor activity / vesicle transport along microtubule / RHO GTPases activate KTN1 / Kinesins / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Resolution of Sister Chromatid Cohesion / Hedgehog 'off' state / Cilium Assembly / Intraflagellar transport / COPI-dependent Golgi-to-ER retrograde traffic / Mitotic Prometaphase / Carboxyterminal post-translational modifications of tubulin / RHOH GTPase cycle / EML4 and NUDC in mitotic spindle formation / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / PKR-mediated signaling / Separation of Sister Chromatids / The role of GTSE1 in G2/M progression after G2 checkpoint / Aggrephagy / kinesin complex / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / MHC class II antigen presentation / Recruitment of NuMA to mitotic centrosomes / microtubule motor activity / COPI-mediated anterograde transport / centrosome localization / mitochondrion transport along microtubule / COPI-dependent Golgi-to-ER retrograde traffic / microtubule-based movement / stress granule disassembly / natural killer cell mediated cytotoxicity / Insulin processing / synaptic vesicle transport / postsynaptic cytosol / microtubule-based process / phagocytic vesicle / axon cytoplasm / MHC class II antigen presentation / dendrite cytoplasm / axon guidance / positive regulation of synaptic transmission, GABAergic / regulation of membrane potential / positive regulation of protein localization to plasma membrane / structural constituent of cytoskeleton / cellular response to type II interferon / centriolar satellite / microtubule cytoskeleton organization / Signaling by ALK fusions and activated point mutants / mitotic cell cycle / microtubule cytoskeleton / nuclear membrane / microtubule binding / 加水分解酵素; 酸無水物に作用; GTPに作用・細胞または細胞小器官の運動に関与 / vesicle / microtubule / cadherin binding / GTPase activity / GTP binding / protein-containing complex binding / perinuclear region of cytoplasm / ATP hydrolysis activity / mitochondrion / ATP binding / metal ion binding / identical protein binding / membrane / cytoplasm / cytosol 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: 5 Å | ||||||
![]() | Shang, Z. / Zhou, K. / Xu, C. / Csencsits, R. / Cochran, J.C. / Sindelar, C.V. | ||||||
![]() | ![]() タイトル: High-resolution structures of kinesin on microtubules provide a basis for nucleotide-gated force-generation. 著者: Zhiguo Shang / Kaifeng Zhou / Chen Xu / Roseann Csencsits / Jared C Cochran / Charles V Sindelar / ![]() 要旨: Microtubule-based transport by the kinesin motors, powered by ATP hydrolysis, is essential for a wide range of vital processes in eukaryotes. We obtained insight into this process by developing ...Microtubule-based transport by the kinesin motors, powered by ATP hydrolysis, is essential for a wide range of vital processes in eukaryotes. We obtained insight into this process by developing atomic models for no-nucleotide and ATP states of the monomeric kinesin motor domain on microtubules from cryo-EM reconstructions at 5-6 Å resolution. By comparing these models with existing X-ray structures of ADP-bound kinesin, we infer a mechanistic scheme in which microtubule attachment, mediated by a universally conserved 'linchpin' residue in kinesin (N255), triggers a clamshell opening of the nucleotide cleft and accompanying release of ADP. Binding of ATP re-closes the cleft in a manner that tightly couples to translocation of cargo, via kinesin's 'neck linker' element. These structural transitions are reminiscent of the analogous nucleotide-exchange steps in the myosin and F1-ATPase motors and inform how the two heads of a kinesin dimer 'gate' each other to promote coordinated stepping along microtubules. | ||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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-検証レポート
文書・要旨 | ![]() | 1 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.1 MB | 表示 | |
XML形式データ | ![]() | 40.3 KB | 表示 | |
CIF形式データ | ![]() | 60 KB | 表示 | |
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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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対称性 | らせん対称: (回転対称性: 1 / Dyad axis: no / N subunits divisor: 1 / Num. of operations: 1 / Rise per n subunits: 8.5215 Å / Rotation per n subunits: -25.77 °) |
詳細 | The reconstructed 14-protofilament microtubule is pseudo-symmetric, containing a seam with 3 starts per tubulin monomer, or 1.5 starts per tubulin dimer. |
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要素
-タンパク質 , 3種, 3分子 KAB
#1: タンパク質 | 分子量: 39238.145 Da / 分子数: 1 断片: Truncated catalytic head domain (monomeric, UNP residues 1-349) 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() |
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#2: タンパク質 | 分子量: 50204.445 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#3: タンパク質 | 分子量: 49983.824 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
-非ポリマー , 4種, 4分子 






#4: 化合物 | ChemComp-ATP / |
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#5: 化合物 | ChemComp-MG / |
#6: 化合物 | ChemComp-GTP / |
#7: 化合物 | ChemComp-GDP / |
-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 |
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分子量 | 値: 0.135 MDa / 実験値: NO | |||||||||||||||||||||||||
緩衝液 | 名称: 25 mM PIPES, 25 mM NaCl, 2 mM MgCl2, 1 mM EGTA / pH: 6.8 / 詳細: 25 mM PIPES, 25 mM NaCl, 2 mM MgCl2, 1 mM EGTA | |||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | |||||||||||||||||||||||||
試料支持 | 詳細: 300 mesh copper grid with homemade holey carbon | |||||||||||||||||||||||||
急速凍結 | 装置: HOMEMADE PLUNGER / 凍結剤: ETHANE 詳細: No glow discharge was applied. After sample application to grid, liquid was mostly 'wicked' away by edgewise application of filter paper. Subsequently, blotting and plunge freezing were ...詳細: No glow discharge was applied. After sample application to grid, liquid was mostly 'wicked' away by edgewise application of filter paper. Subsequently, blotting and plunge freezing were performed with ~0.5 second delay after blotting but prior to plunging into liquid ethane. 手法: No glow discharge was applied. After sample application to grid, liquid was mostly 'wicked' away by edgewise application of filter paper. Subsequently, blotting and plunge freezing were ...手法: No glow discharge was applied. After sample application to grid, liquid was mostly 'wicked' away by edgewise application of filter paper. Subsequently, blotting and plunge freezing were performed with ~0.5 second delay after blotting but prior to plunging. |
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電子顕微鏡撮影
顕微鏡 | モデル: FEI TITAN / 日付: 2013年6月2日 詳細: 4K x 4K counting mode was used. 24 frames total were collected. |
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電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(補正後): 23859 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): 1000 nm / Cs: 2 mm / カメラ長: 0 mm |
試料ホルダ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
撮影 | 電子線照射量: 15 e/Å2 フィルム・検出器のモデル: GATAN ULTRASCAN 4000 (4k x 4k) |
画像スキャン | デジタル画像の数: 51 |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 相対比: 1 |
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解析
EMソフトウェア |
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CTF補正 | 詳細: done within FREALIGN | ||||||||||||
らせん対称 | 回転角度/サブユニット: 25.77 ° / 軸方向距離/サブユニット: 8.5215 Å / らせん対称軸の対称性: C1 詳細: The reconstructed 14-protofilament microtubule is pseudo-symmetric, containing a seam with 3 starts per tubulin monomer, or 1.5 starts per tubulin dimer. | ||||||||||||
3次元再構成 | 手法: Single particle / 解像度: 5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 49961 / ピクセルサイズ(公称値): 2.097 Å / ピクセルサイズ(実測値): 2.097 Å 詳細: Initial alignment was done using customized SPIDER scripts. Reconstruction and subsequent refinement were done by FREALIGN. 対称性のタイプ: HELICAL | ||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL Target criteria: RMSD from the starting structure was monitored for convergence. 詳細: REFINEMENT PROTOCOL--flexible DETAILS--MDFF was performed using explicit solvation, after placing active-site water coordinates identified in high-resolution crystal structures of kinesins ...詳細: REFINEMENT PROTOCOL--flexible DETAILS--MDFF was performed using explicit solvation, after placing active-site water coordinates identified in high-resolution crystal structures of kinesins ATP-like state. Side chains were excluded from the MDFF target potential. Following several equilibration steps, the relative strength of the EM map potential (GSCALE term) was slowly increased from 0 to 1 over the course of 10 nanoseconds. The t = 1.4 ns time point was selected to represent the final fitted model, based on the approximate convergence of the RMSD from the starting structure. | ||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / Accession code: 4HNA / Initial refinement model-ID: 1 / PDB-ID: 4HNA / Source name: PDB / タイプ: experimental model
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精密化ステップ | サイクル: LAST
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