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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 8yy5 | ||||||||||||||||||||||||
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| タイトル | Kinesin-14 with AlF3 bound to 14 PF Microtubule | ||||||||||||||||||||||||
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キーワード | CELL CYCLE / Kinesin Motor Proteins / Force Production / Power Stroke Fluctuations / Motor Spring-like Element / Reversed Motility / Mechanochemical Coupling / Mechanical States | ||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報minus-end directed microtubule sliding / distributive segregation / regulation of mitotic spindle elongation / meiotic spindle assembly / Regulation of PLK1 Activity at G2/M Transition / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Anchoring of the basal body to the plasma membrane / AURKA Activation by TPX2 / Recruitment of mitotic centrosome proteins and complexes ...minus-end directed microtubule sliding / distributive segregation / regulation of mitotic spindle elongation / meiotic spindle assembly / Regulation of PLK1 Activity at G2/M Transition / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Anchoring of the basal body to the plasma membrane / AURKA Activation by TPX2 / Recruitment of mitotic centrosome proteins and complexes / mitotic spindle elongation / odontoblast differentiation / mitotic spindle microtubule / meiotic spindle organization / Neutrophil degranulation / microtubule bundle formation / regulation of mitotic spindle assembly / mitotic centrosome separation / 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 / meiotic spindle / spindle assembly involved in female meiosis / 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 / minus-end-directed microtubule motor activity / spindle organization / Recruitment of NuMA to mitotic centrosomes / COPI-mediated anterograde transport / nuclear envelope lumen / regulation of synapse organization / MHC class I protein binding / mitotic spindle assembly / mRNA transport / intercellular bridge / spindle assembly / mitotic spindle organization / chromosome segregation / structural constituent of cytoskeleton / 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 / microtubule cytoskeleton organization / spindle / cytoplasmic ribonucleoprotein granule / mitotic spindle / mitotic cell cycle / microtubule cytoskeleton / cell body / 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 / microtubule / cell division / hydrolase activity / GTPase activity / ubiquitin protein ligase binding / centrosome / GTP binding / protein homodimerization activity / ATP binding / metal ion binding / nucleus / 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: 3.99 Å | ||||||||||||||||||||||||
データ登録者 | Shibata, S. / Imasaki, T. / Shigematsu, H. / Endow, S.A. / Nitta, R. | ||||||||||||||||||||||||
| 資金援助 | 日本, 4件
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引用 | ジャーナル: Sci Rep / 年: 2026タイトル: Structural analysis of a motor with increased mechanical output reveals new transitions in kinesin microtubule motility. 著者: Satoki Shibata / Matthew Y Wang / Tsuyoshi Imasaki / Hideki Shigematsu / Diego Ugarte La Torre / Yuanyuan Wei / Chacko Jobichen / Hajime Hagio / J Sivaraman / Yuji Sugita / Sharyn A Endow / Ryo Nitta / ![]() 要旨: Kinesin motors use ATP to produce force in cells, yet the conformational changes that generate force remain uncertain. Here, we report structural and mechanistic insights into a minus-end-directed ...Kinesin motors use ATP to produce force in cells, yet the conformational changes that generate force remain uncertain. Here, we report structural and mechanistic insights into a minus-end-directed kinesin-14 that exhibits increased mechanical output – the variant motor binds microtubules more tightly and moves with faster velocity than wild type. High-resolution structures, together with molecular dynamics simulations, reveal previously unobserved transitions in the nucleotide hydrolysis cycle. ADP release, triggered by microtubule binding, is coupled to twisting of the central β-sheet and stabilization of the stalk prior to the power stroke. ATP binding induces stalk fluctuations and a swing of the neck mimic, an element analogous to the kinesin-1 neck linker, resembling neck linker docking in plus-end-directed kinesins. The power stroke, characterized by a large stalk rotation, is followed by motor detachment from microtubules. The subsequent recovery stroke occurs while the motor is bound to ADP and free Pi, accompanied by β-strand-to-loop transitions, or β-sheet melting, implying that β-sheet refolding facilitates Pi release. The observed twisting and melting identify the central β-sheet as the long-sought elastic element or spring required for motor force production. The transitions we observe in kinesin-14 may also apply to other kinesins – this remains to be tested. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1038/s41598-025-28573-7. #1: ジャーナル: bioRxiv / 年: 2024タイトル: Structural transitions in kinesin minus-end directed microtubule motility. 著者: Satoki Shibata / Matthew Y Wang / Tsuyoshi Imasaki / Hideki Shigematsu / Yuanyuan Wei / Chacko Jobichen / Hajime Hagio / J Sivaraman / Sharyn A Endow / Ryo Nitta / ![]() 要旨: Kinesin motor proteins hydrolyze ATP to produce force for spindle assembly and vesicle transport, performing essential functions in cell division and motility, but the structural changes required for ...Kinesin motor proteins hydrolyze ATP to produce force for spindle assembly and vesicle transport, performing essential functions in cell division and motility, but the structural changes required for force generation are uncertain. We now report high-resolution structures showing new transitions in the kinesin mechanochemical cycle, including power stroke fluctuations upon ATP binding and a post-hydrolysis state with bound ADP + free phosphate. We find that rate-limiting ADP release occurs upon microtubule binding, accompanied by central β-sheet twisting, which triggers the power stroke - stalk rotation and neck mimic docking - upon ATP binding. Microtubule release occurs with β-strand-to-loop transitions, implying that β-strand refolding induces Pi release and the recovery stroke. The strained β-sheet during the power stroke and strand-to-loop transitions identify the β-sheet as the long-sought motor spring. | ||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 8yy5.cif.gz | 288.5 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8yy5.ent.gz | 229 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8yy5.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/yy/8yy5 ftp://data.pdbj.org/pub/pdb/validation_reports/yy/8yy5 | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 39667MC ![]() 8yueC ![]() 8yy2C ![]() 8yy3C ![]() 8yy4C 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 F&H 検索 |
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リンク
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集合体
| 登録構造単位 | ![]()
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| 1 | ![]()
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要素
-タンパク質 , 3種, 4分子 ABCD
| #1: 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) ![]() 参照: UniProt: Q2XVP4, 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 |
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| #2: タンパク質 | 分子量: 49717.629 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: 46450.453 Da / 分子数: 2 / Mutation: E292M, Y485K, N697S / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: ncd, CA(ND), CG7831 / 発現宿主: ![]() 参照: UniProt: P20480, 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 |
-非ポリマー , 5種, 7分子 








| #4: 化合物 | ChemComp-GTP / | ||||
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| #5: 化合物 | ChemComp-GDP / | ||||
| #6: 化合物 | | #7: 化合物 | #8: 化合物 | ChemComp-ALF / | |
-詳細
| 研究の焦点であるリガンドがあるか | Y |
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| Has protein modification | N |
-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: 200 kDa/nm / 実験値: YES | ||||||||||||||||||||||||||||||||||||||||
| 由来(天然) |
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| 由来(組換発現) | 生物種: ![]() | ||||||||||||||||||||||||||||||||||||||||
| 緩衝液 | pH: 6.8 詳細: 100 mM PIPES pH 6.8, 1 mM MgCl2, 1 mM EGTA, 1 mM GTP, 2 mM ADP, 2 mM AlCl3, and 8 mM NaF | ||||||||||||||||||||||||||||||||||||||||
| 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 | ||||||||||||||||||||||||||||||||||||||||
| 試料支持 | 詳細: 10 mA / 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 R2/1 | ||||||||||||||||||||||||||||||||||||||||
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 90 % / 凍結前の試料温度: 310 K |
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電子顕微鏡撮影
| 顕微鏡 | モデル: JEOL CRYO ARM 300 |
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| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 800 nm |
| 撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (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 | ||||||||||||
| らせん対称 | 回転角度/サブユニット: -25.7461 ° / 軸方向距離/サブユニット: 8.74441 Å / らせん対称軸の対称性: C1 | ||||||||||||
| 3次元再構成 | 解像度: 3.99 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 30975 / 対称性のタイプ: HELICAL |
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万見について







日本, 4件
引用









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FIELD EMISSION GUN