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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: 4atx | ||||||
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タイトル | Rigor kinesin motor domain with an ordered neck-linker, docked on tubulin dimer, modelled into the 8A cryo-EM map of doublecortin- microtubules decorated with kinesin | ||||||
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![]() | HYDROLASE / MICROTUBULE / NECK-LINKER | ||||||
機能・相同性 | ![]() RHO GTPases activate KTN1 / Kinesins / membrane-bounded organelle / COPI-dependent Golgi-to-ER retrograde traffic / cytoplasm organization / plus-end-directed vesicle transport along microtubule / anterograde dendritic transport of neurotransmitter receptor complex / positive regulation of voltage-gated sodium channel activity / positive regulation of vesicle fusion / anterograde axonal protein transport ...RHO GTPases activate KTN1 / Kinesins / membrane-bounded organelle / COPI-dependent Golgi-to-ER retrograde traffic / cytoplasm organization / plus-end-directed vesicle transport along microtubule / anterograde dendritic transport of neurotransmitter receptor complex / positive regulation of voltage-gated sodium channel activity / positive regulation of vesicle fusion / anterograde axonal protein transport / MHC class II antigen presentation / retrograde neuronal dense core vesicle transport / vesicle transport along microtubule / cytoskeleton-dependent intracellular transport / positive regulation of intracellular protein transport / positive regulation of potassium ion transport / JUN kinase binding / plus-end-directed microtubule motor activity / stress granule disassembly / positive regulation of axon guidance / ciliary rootlet / centrosome localization / microtubule lateral binding / microtubule motor activity / kinesin complex / synaptic vesicle transport / microtubule-based movement / positive regulation of insulin secretion involved in cellular response to glucose stimulus / microtubule-based process / centriolar satellite / endocytic vesicle / axonal growth cone / axon cytoplasm / dendrite cytoplasm / phagocytic vesicle / regulation of membrane potential / positive regulation of synaptic transmission, GABAergic / hippocampus development / positive regulation of protein localization to plasma membrane / 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 / axon guidance / brain development / structural constituent of cytoskeleton / cellular response to type II interferon / microtubule cytoskeleton organization / microtubule cytoskeleton / nervous system development / mitotic cell cycle / microtubule binding / microtubule / vesicle / hydrolase activity / neuron projection / protein heterodimerization activity / GTPase activity / GTP binding / perinuclear region of cytoplasm / ATP hydrolysis activity / ATP binding / identical protein binding / metal ion binding / cytoplasm / cytosol 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() ![]() ![]() | ||||||
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: 8.2 Å | ||||||
![]() | Liu, J.S. / Schubert, C.R. / Fu, X. / Fourniol, F.J. / Jaiswal, J.K. / Houdusse, A. / Stultz, C.M. / Moores, C.A. / Walsh, C.A. | ||||||
![]() | ![]() タイトル: Molecular basis for specific regulation of neuronal kinesin-3 motors by doublecortin family proteins. 著者: Judy S Liu / Christian R Schubert / Xiaoqin Fu / Franck J Fourniol / Jyoti K Jaiswal / Anne Houdusse / Collin M Stultz / Carolyn A Moores / Christopher A Walsh / ![]() 要旨: Doublecortin (Dcx) defines a growing family of microtubule (MT)-associated proteins (MAPs) involved in neuronal migration and process outgrowth. We show that Dcx is essential for the function of ...Doublecortin (Dcx) defines a growing family of microtubule (MT)-associated proteins (MAPs) involved in neuronal migration and process outgrowth. We show that Dcx is essential for the function of Kif1a, a kinesin-3 motor protein that traffics synaptic vesicles. Neurons lacking Dcx and/or its structurally conserved paralogue, doublecortin-like kinase 1 (Dclk1), show impaired Kif1a-mediated transport of Vamp2, a cargo of Kif1a, with decreased run length. Human disease-associated mutations in Dcx's linker sequence (e.g., W146C, K174E) alter Kif1a/Vamp2 transport by disrupting Dcx/Kif1a interactions without affecting Dcx MT binding. Dcx specifically enhances binding of the ADP-bound Kif1a motor domain to MTs. Cryo-electron microscopy and subnanometer-resolution image reconstruction reveal the kinesin-dependent conformational variability of MT-bound Dcx and suggest a model for MAP-motor crosstalk on MTs. Alteration of kinesin run length by MAPs represents a previously undiscovered mode of control of kinesin transport and provides a mechanism for regulation of MT-based transport by local signals. #1: ![]() タイトル: Template-free 13-protofilament microtubule-MAP assembly visualized at 8 A resolution. 著者: Franck J Fourniol / Charles V Sindelar / Béatrice Amigues / Daniel K Clare / Geraint Thomas / Mylène Perderiset / Fiona Francis / Anne Houdusse / Carolyn A Moores / ![]() 要旨: Microtubule-associated proteins (MAPs) are essential for regulating and organizing cellular microtubules (MTs). However, our mechanistic understanding of MAP function is limited by a lack of detailed ...Microtubule-associated proteins (MAPs) are essential for regulating and organizing cellular microtubules (MTs). However, our mechanistic understanding of MAP function is limited by a lack of detailed structural information. Using cryo-electron microscopy and single particle algorithms, we solved the 8 Å structure of doublecortin (DCX)-stabilized MTs. Because of DCX's unusual ability to specifically nucleate and stabilize 13-protofilament MTs, our reconstruction provides unprecedented insight into the structure of MTs with an in vivo architecture, and in the absence of a stabilizing drug. DCX specifically recognizes the corner of four tubulin dimers, a binding mode ideally suited to stabilizing both lateral and longitudinal lattice contacts. A striking consequence of this is that DCX does not bind the MT seam. DCX binding on the MT surface indirectly stabilizes conserved tubulin-tubulin lateral contacts in the MT lumen, operating independently of the nucleotide bound to tubulin. DCX's exquisite binding selectivity uncovers important insights into regulation of cellular MTs. | ||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 234 KB | 表示 | ![]() |
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PDB形式 | ![]() | 182 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 54.6 KB | 表示 | |
CIF形式データ | ![]() | 77.7 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-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: 49907.770 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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#2: タンパク質 | 分子量: 50236.352 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: 38136.984 Da / 分子数: 1 / Fragment: MOTOR DOMAIN, RESIDUES 1-340 / Mutation: YES / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
#4: 化合物 | ChemComp-GDP / |
#5: 化合物 | ChemComp-GTP / |
-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 | 名称: DOUBLECORTIN-STABILISED MICROTUBULES DECORATED WITH KINESIN MOTOR DOMAINS タイプ: COMPLEX |
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緩衝液 | 名称: 20MM PIPES, 1MM EGTA, 3MM MGCL2, 1MM TCEP, 0.5MM GTP pH: 6.8 詳細: 20MM PIPES, 1MM EGTA, 3MM MGCL2, 1MM TCEP, 0.5MM GTP |
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: HOLEY CARBON |
急速凍結 | 装置: FEI VITROBOT MARK I / 凍結剤: ETHANE 詳細: CRYOGEN- ETHANE, HUMIDITY- 100, INSTRUMENT- FEI VITROBOT |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Tecnai F20 / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TECNAI F20 / 日付: 2009年9月1日 |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 50000 X / 最大 デフォーカス(公称値): 2900 nm / 最小 デフォーカス(公称値): 760 nm / Cs: 2 mm |
試料ホルダ | 温度: 93 K |
撮影 | 電子線照射量: 15 e/Å2 / フィルム・検出器のモデル: KODAK SO-163 FILM |
画像スキャン | デジタル画像の数: 63 |
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 WITH FREALIGN | |||||||||||||||||||||
3次元再構成 | 手法: SINGLE PARTICLE / 解像度: 8.2 Å / 粒子像の数: 168000 / ピクセルサイズ(公称値): 2.8 Å 詳細: A HOMOLOGY MODEL OF RAT KINESIN MOTOR DOMAIN MUTANT T93N WAS GENERATED USING MODELLER, BASED ON THE STRUCTURE OF HUMAN KINESIN 1BG2. 2) KINESIN LOOP11 (AA 237-254) WAS OMITTED IN THIS MODEL ...詳細: A HOMOLOGY MODEL OF RAT KINESIN MOTOR DOMAIN MUTANT T93N WAS GENERATED USING MODELLER, BASED ON THE STRUCTURE OF HUMAN KINESIN 1BG2. 2) KINESIN LOOP11 (AA 237-254) WAS OMITTED IN THIS MODEL AS NO CRYSTAL STRUCTURE REFLECTED THE CONFORMATION OF LOOP11 VISUALISED IN THE EM MAP SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2098. (DEPOSITION ID: 10790). 対称性のタイプ: HELICAL | |||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL / Target criteria: Cross-correlation coefficient / 詳細: METHOD--RIGID BODY | |||||||||||||||||||||
原子モデル構築 |
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精密化 | 最高解像度: 8.2 Å | |||||||||||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 8.2 Å
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