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基本情報
登録情報 | データベース: EMDB / ID: EMD-6187 | |||||||||
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タイトル | High-resolution structures of kinesin on microtubules provide a basis for nucleotide-gated force generation | |||||||||
![]() | Microtubule decorated with monomeric human kinesin (K349 construct) having an empty nucleotide pocket. | |||||||||
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![]() | molecular motors / kinesin / myosin / microtubules / cytoskeletal motors | |||||||||
機能・相同性 | ![]() regulation of modification of synapse structure, modulating synaptic transmission / plus-end-directed vesicle transport along microtubule / cytoplasm organization / anterograde dendritic transport of neurotransmitter receptor complex / cytolytic granule membrane / anterograde neuronal dense core vesicle transport / mitocytosis / retrograde neuronal dense core vesicle transport / anterograde axonal protein transport / vesicle transport along microtubule ...regulation of modification of synapse structure, modulating synaptic transmission / plus-end-directed vesicle transport along microtubule / cytoplasm organization / anterograde dendritic transport of neurotransmitter receptor complex / cytolytic granule membrane / anterograde neuronal dense core vesicle transport / mitocytosis / retrograde neuronal dense core vesicle transport / anterograde axonal protein transport / vesicle transport along microtubule / lysosome localization / positive regulation of potassium ion transport / 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 / plus-end-directed microtubule motor activity / Kinesins / RHO GTPases activate KTN1 / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / kinesin complex / 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 / ciliary rootlet / microtubule-based movement / stress granule disassembly / natural killer cell mediated cytotoxicity / synaptic vesicle transport / Insulin processing / postsynaptic cytosol / microtubule-based process / phagocytic vesicle / axon cytoplasm / dendrite cytoplasm / MHC class II antigen presentation / axon guidance / regulation of membrane potential / positive regulation of synaptic transmission, GABAergic / positive regulation of protein localization to plasma membrane / structural constituent of cytoskeleton / cellular response to type II interferon / microtubule cytoskeleton organization / centriolar satellite / Signaling by ALK fusions and activated point mutants / mitotic cell cycle / microtubule cytoskeleton / 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 / nuclear membrane / vesicle / microtubule / cadherin binding / GTPase activity / protein-containing complex binding / GTP binding / perinuclear region of cytoplasm / ATP hydrolysis activity / mitochondrion / ATP binding / metal ion binding / identical protein binding / membrane / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() | |||||||||
手法 | らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 5.0 Å | |||||||||
![]() | Shang ZG / Zhou KF / Xu C / Csencsits R / Cochran JC / Sindelar CV | |||||||||
![]() | ![]() 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
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構造ビューア | EMマップ: ![]() ![]() ![]() |
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マップデータ | ![]() | 12.7 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 11.9 KB 11.9 KB | 表示 表示 | ![]() |
画像 | ![]() ![]() | 77.1 KB 4.9 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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「今月の分子」の関連する項目 |
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ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Microtubule decorated with monomeric human kinesin (K349 construct) having an empty nucleotide pocket. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 これらの図は立方格子座標系で作成されたものです | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.99 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
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試料の構成要素
-全体 : Microtubule decorated with monomeric human kinesin (K349 construc...
全体 | 名称: Microtubule decorated with monomeric human kinesin (K349 construct) having an empty nucleotide pocket. |
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要素 |
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-超分子 #1000: Microtubule decorated with monomeric human kinesin (K349 construc...
超分子 | 名称: Microtubule decorated with monomeric human kinesin (K349 construct) having an empty nucleotide pocket. タイプ: sample / ID: 1000 集合状態: One monomer of kinesin binds to one heterodimer of tubulin Number unique components: 2 |
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分子量 | 理論値: 135 KDa |
-分子 #1: monomeric kinesin-1A
分子 | 名称: monomeric kinesin-1A / タイプ: protein_or_peptide / ID: 1 / 詳細: K349 / コピー数: 1 / 集合状態: monomer / 組換発現: Yes |
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由来(天然) | 生物種: ![]() |
分子量 | 理論値: 38 KDa |
組換発現 | 生物種: ![]() ![]() |
-分子 #2: tubulin
分子 | 名称: tubulin / タイプ: protein_or_peptide / ID: 2 / 集合状態: heterodimer / 組換発現: No / データベース: NCBI |
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由来(天然) | 生物種: ![]() ![]() |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | らせん対称体再構成法 |
試料の集合状態 | filament |
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試料調製
緩衝液 | pH: 6.8 / 詳細: 25 mM PIPES, 25 mM NaCl, 2 mM MgCl2, 1 mM EGTA |
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グリッド | 詳細: 300 mesh copper grid with homemade holey carbon |
凍結 | 凍結剤: ETHANE / 装置: HOMEMADE PLUNGER |
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電子顕微鏡法
顕微鏡 | FEI TECNAI F30 |
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詳細 | 8K x 8K Super-resolution mode was used; 10 frames total were collected. |
日付 | 2013年4月15日 |
撮影 | カテゴリ: CCD / フィルム・検出器のモデル: GATAN K2 (4k x 4k) / 平均電子線量: 15 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): 2.5 µm / 最小 デフォーカス(公称値): 1.0 µm / 倍率(公称値): 130000 |
試料ステージ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
実験機器 | ![]() モデル: Tecnai F30 / 画像提供: FEI Company |
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画像解析
詳細 | Initial alignment was done using customized SPIDER scripts. Reconstruction and subsequent refinement was done by FREALIGN. |
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最終 再構成 | 想定した対称性 - らせんパラメータ - Δz: 9.455 Å 想定した対称性 - らせんパラメータ - ΔΦ: 25.77 ° 想定した対称性 - らせんパラメータ - 軸対称性: C1 (非対称) アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 5.0 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: SPIDER, FREALIGN 詳細: Approximately 140,000 asymmetric units were averaged in the final reconstruction. |
CTF補正 | 詳細: done within FREALIGN |
-原子モデル構築 1
初期モデル | PDB ID: Chain - #0 - Chain ID: K / Chain - #1 - Chain ID: A / Chain - #2 - Chain ID: B |
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ソフトウェア | 名称: MDFF |
詳細 | MDFF was performed using explicit solvation, after placing active-site water coordinates identified in high-resolution crystal structures of kinesin's ATP-like state. Side chains were removed 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. |
精密化 | 空間: REAL / プロトコル: FLEXIBLE FIT 当てはまり具合の基準: RMSD from the starting structure was monitored for convergence |
得られたモデル | ![]() PDB-3j8x: |