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基本情報
登録情報 | データベース: PDB / ID: 9f3r | ||||||||||||||||||
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タイトル | 13pf E254Q microtubule from recombinant human tubulin decorated with EB3 | ||||||||||||||||||
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![]() | STRUCTURAL PROTEIN / Microtubule Tubulin GTP cp Cell cycle | ||||||||||||||||||
機能・相同性 | ![]() netrin receptor binding / mitotic spindle astral microtubule end / Post-chaperonin tubulin folding pathway / protein localization to microtubule / dorsal root ganglion development / Cilium Assembly / cytoskeleton-dependent intracellular transport / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Carboxyterminal post-translational modifications of tubulin / microtubule plus-end ...netrin receptor binding / mitotic spindle astral microtubule end / Post-chaperonin tubulin folding pathway / protein localization to microtubule / dorsal root ganglion development / Cilium Assembly / cytoskeleton-dependent intracellular transport / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Carboxyterminal post-translational modifications of tubulin / microtubule plus-end / Intraflagellar transport / Sealing of the nuclear envelope (NE) by ESCRT-III / Formation of tubulin folding intermediates by CCT/TriC / Gap junction assembly / microtubule plus-end binding / positive regulation of cyclin-dependent protein serine/threonine kinase activity / Prefoldin mediated transfer of substrate to CCT/TriC / COPI-independent Golgi-to-ER retrograde traffic / Kinesins / Assembly and cell surface presentation of NMDA receptors / COPI-dependent Golgi-to-ER retrograde traffic / regulation of microtubule polymerization / microtubule organizing center / Recycling pathway of L1 / RHOH GTPase cycle / positive regulation of protein kinase activity / regulation of microtubule polymerization or depolymerization / spindle midzone / RHO GTPases activate IQGAPs / microtubule-based process / intercellular bridge / Hedgehog 'off' state / Activation of AMPK downstream of NMDARs / cytoplasmic microtubule / spindle assembly / COPI-mediated anterograde transport / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / MHC class II antigen presentation / Recruitment of NuMA to mitotic centrosomes / Resolution of Sister Chromatid Cohesion / cellular response to interleukin-4 / peptide binding / axon guidance / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / cell periphery / Translocation of SLC2A4 (GLUT4) to the plasma membrane / filopodium / RHO GTPases Activate Formins / PKR-mediated signaling / structural constituent of cytoskeleton / microtubule cytoskeleton organization / HCMV Early Events / Aggrephagy / mitotic spindle / Separation of Sister Chromatids / The role of GTSE1 in G2/M progression after G2 checkpoint / intracellular protein localization / mitotic cell cycle / lamellipodium / double-stranded RNA binding / microtubule cytoskeleton / growth cone / midbody / 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 / cilium / axon / cell division / neuronal cell body / GTPase activity / dendrite / ubiquitin protein ligase binding / protein kinase binding / GTP binding / positive regulation of DNA-templated transcription / perinuclear region of cytoplasm / structural molecule activity / extracellular exosome / metal ion binding / identical protein binding / nucleus / cytoplasm 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: 4.3 Å | ||||||||||||||||||
![]() | Estevez-Gallego, J. / Blum, T.B. / Steinmetz, M.O. / Surrey, T. | ||||||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Hydrolysis-deficient mosaic microtubules as faithful mimics of the GTP cap. 著者: Juan Estévez-Gallego / Thorsten B Blum / Felix Ruhnow / María Gili / Silvia Speroni / Raquel García-Castellanos / Michel O Steinmetz / Thomas Surrey / ![]() ![]() 要旨: A critical feature of microtubules is their GTP cap, a stabilizing GTP-tubulin rich region at growing microtubule ends. Microtubules polymerized in the presence of GTP analogs or from GTP hydrolysis- ...A critical feature of microtubules is their GTP cap, a stabilizing GTP-tubulin rich region at growing microtubule ends. Microtubules polymerized in the presence of GTP analogs or from GTP hydrolysis-deficient tubulin mutants have been used as GTP-cap mimics for structural and biochemical studies. However, these analogs and mutants generate microtubules with diverse biochemical properties and lattice structures, leaving it unclear what is the most faithful GTP mimic and hence the structure of the GTP cap. Here, we generate a hydrolysis-deficient human tubulin mutant, αE254Q, with the smallest possible modification. We show that αE254Q-microtubules are stable, but still exhibit mild mutation-induced growth abnormalities. However, mixing two GTP hydrolysis-deficient tubulin mutants, αE254Q and αE254N, at an optimized ratio eliminates growth and lattice abnormalities, indicating that these 'mosaic microtubules' are faithful GTP cap mimics. Their cryo-electron microscopy structure reveals that longitudinal lattice expansion, but not protofilament twist, is the primary structural feature distinguishing the GTP-tubulin containing cap from the GDP-tubulin containing microtubule shaft. However, alterations in protofilament twist may be transiently needed to allow lattice compaction and GTP hydrolysis. Together, our results provide insights into the structural origin of GTP cap stability, the pathway of GTP hydrolysis and hence microtubule dynamic instability. | ||||||||||||||||||
履歴 |
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構造の表示
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 | ![]() | 1.1 MB | 表示 | ![]() |
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PDB形式 | ![]() | 774.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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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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要素
#1: タンパク質 | 分子量: 15386.819 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: タンパク質 | 分子量: 50732.238 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #3: タンパク質 | 分子量: 51276.367 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #4: 化合物 | ChemComp-GTP / #5: 化合物 | ChemComp-MG / 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
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-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: HELICAL ARRAY / 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 | 名称: 13pf E254Q microtubule from recombinant human tubulin decorated with EB3 タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: #1-#3 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 6.8 |
試料 | 濃度: 20 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドのタイプ: C-flat |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 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: TFS GLACIOS |
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電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 700 nm |
撮影 | 電子線照射量: 7.19 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 撮影したグリッド数: 1 / 実像数: 2954 |
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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 | ||||||||||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: -27.6835 ° / 軸方向距離/サブユニット: 9.58171 Å / らせん対称軸の対称性: C13 | ||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 790270 | ||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 33410 / 対称性のタイプ: HELICAL | ||||||||||||||||||||||||||||
原子モデル構築 | B value: 190 / プロトコル: RIGID BODY FIT / 空間: REAL | ||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 7sj7 Accession code: 7sj7 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 32.06 Å2 | ||||||||||||||||||||||||||||
拘束条件 |
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