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基本情報
| 登録情報 | データベース: PDB / ID: 8riz | ||||||||||||
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| タイトル | Microtubule-associated kinesin-1 tail complex bound to ADP, two-headed state | ||||||||||||
要素 |
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キーワード | MOTOR PROTEIN / Kinesin autoinhibition motor microtubules mechanochemistry intracellular transport | ||||||||||||
| 機能・相同性 | 機能・相同性情報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 / microtubule motor activity / Recruitment of NuMA to mitotic centrosomes / centrosome localization / COPI-mediated anterograde transport / 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 / 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 / cellular response to type II interferon / structural constituent of cytoskeleton / centriolar satellite / microtubule cytoskeleton organization / neuron migration / 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 | Homo sapiens (ヒト)![]() | ||||||||||||
| 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: 3.6 Å | ||||||||||||
データ登録者 | Atherton, J. / Chegkazi, M.S. / Steiner, R.A. | ||||||||||||
| 資金援助 | 英国, 3件
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引用 | ジャーナル: Nat Commun / 年: 2025タイトル: Microtubule association induces a Mg-free apo-like ADP pre-release conformation in kinesin-1 that is unaffected by its autoinhibitory tail. 著者: J Atherton / M S Chegkazi / M Leusciatti / M Di Palma / E Peirano / L S Pozzer / M V A Meli / S Pasqualato / T Foran / G Morra / R A Steiner / ![]() 要旨: Kinesin-1 is a processive dimeric ATP-driven motor that transports vital intracellular cargos along microtubules (MTs). If not engaged in active transport, kinesin-1 limits futile ATP hydrolysis by ...Kinesin-1 is a processive dimeric ATP-driven motor that transports vital intracellular cargos along microtubules (MTs). If not engaged in active transport, kinesin-1 limits futile ATP hydrolysis by adopting a compact autoinhibited conformation that involves an interaction between its C-terminal tail and the N-terminal motor domains. Here, using a chimeric kinesin-1 that fuses the N-terminal motor region to the tail and a tail variant unable to interact with the motors, we employ cryo-EM to investigate elements of the MT-associated mechanochemical cycle. We describe a missing structure for the proposed two-step allosteric mechanism of ADP release, the ATPase rate limiting step. It shows that MT association remodels the hydrogen bond network at the nucleotide binding site triggering removal of the Mg ion from the Mg-ADP complex. This results in a strong MT-binding apo-like state before ADP dissociation, which molecular dynamics simulations indicate is mediated by loop 9 dynamics. We further demonstrate that tail association does not directly affect this mechanism, nor the adoption of the ATP hydrolysis-competent conformation, nor neck linker docking/undocking, even when zippering the two motor domains. We propose a revised mechanism for tail-dependent kinesin-1 autoinhibition and suggest a possible explanation for its characteristic pausing behavior on MTs. #1: ジャーナル: Biorxiv / 年: 2024タイトル: Microtubule association induces a Mg-free apo-like ADP pre-release conformation in kinesin-1 that is unaffected by its autoinhibitory tail 著者: Atherton, J. / Chegkazi, M.S. / Peirano, E. / Pozzer, L.S. / Foran, T. / Steiner, R.A. | ||||||||||||
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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 | 8riz.cif.gz | 348.4 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8riz.ent.gz | 252.2 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8riz.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
| 文書・要旨 | 8riz_validation.pdf.gz | 1.7 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 8riz_full_validation.pdf.gz | 1.8 MB | 表示 | |
| XML形式データ | 8riz_validation.xml.gz | 53.2 KB | 表示 | |
| CIF形式データ | 8riz_validation.cif.gz | 81 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ri/8riz ftp://data.pdbj.org/pub/pdb/validation_reports/ri/8riz | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 19192MC ![]() 8rhbC ![]() 8rhhC ![]() 8rikC ![]() 9gnqC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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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要素
-タンパク質 , 3種, 5分子 BAKLT
| #1: タンパク質 | 分子量: 49907.770 Da / 分子数: 1 / 由来タイプ: 天然 / 詳細: GDP and taxol / 由来: (天然) ![]() |
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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 / 詳細: GTP / 由来: (天然) ![]() |
| #3: タンパク質 | 分子量: 109856.102 Da / 分子数: 3 / 由来タイプ: 組換発現 / 詳細: Bound to ADP,Bound to ADP / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: KIF5B, KNS, KNS1 / 発現宿主: ![]() |
-非ポリマー , 5種, 7分子 








| #4: 化合物 | ChemComp-GDP / | ||
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| #5: 化合物 | ChemComp-TA1 / | ||
| #6: 化合物 | ChemComp-GTP / | ||
| #7: 化合物 | | #8: 化合物 | |
-詳細
| 研究の焦点であるリガンドがあるか | N |
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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: 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 | 値: 246 kDa/nm / 実験値: NO | ||||||||||||||||||||||||
| 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: BRB80 + 5mM ADP | ||||||||||||||||||||||||
| 試料 | 濃度: 1.16 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: Kinesin 1mg/ml Microtubules at 0.16mg/ml | ||||||||||||||||||||||||
| 試料支持 | グリッドの材料: COPPER / グリッドのタイプ: C-flat-2/2 | ||||||||||||||||||||||||
| 急速凍結 | 装置: LEICA EM GP / 凍結剤: ETHANE / 湿度: 80 % |
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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: 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): 2500 nm / 最小 デフォーカス(公称値): 700 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
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 39512 / 詳細: Noise-substitution test corrected FSC / 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 / 詳細: Phenix Real Space refine and Coot |
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万見について




Homo sapiens (ヒト)

英国, 3件
引用









PDBj




















FIELD EMISSION GUN