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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: 7rs5 | ||||||
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タイトル | Cryo-EM structure of Kip3 (AMPPNP) bound to Taxol-Stabilized Microtubules | ||||||
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![]() | MOTOR PROTEIN / kinesin-8 / microtubules / complex | ||||||
機能・相同性 | ![]() motile cilium / structural constituent of cytoskeleton / microtubule cytoskeleton organization / neuron migration / mitotic cell cycle / 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 / hydrolase activity / GTPase activity / GTP binding ...motile cilium / structural constituent of cytoskeleton / microtubule cytoskeleton organization / neuron migration / mitotic cell cycle / 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 / hydrolase activity / GTPase activity / GTP binding / metal ion binding / 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: 3.9 Å | ||||||
![]() | Hernandez-Lopez, R.A. / Leschziner, A.E. / Arellano-Santoyo, H. / Pellman, D. / Stokasimov, E. / Wang, R.Y.-R. | ||||||
資金援助 | 1件
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![]() | ![]() タイトル: Multimodal tubulin binding by the yeast kinesin-8, Kip3, underlies its motility and depolymerization 著者: Arellano-Santoyo, H. / Hernandez-Lopez, R.A. / Stokasimov, E. / Wang, R.Y.R. / Pellman, D. / Leschziner, A.E. | ||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 24666MC ![]() 7rs6C 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 ![]() |
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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, 27分子 ACEGILNPRBDFHJMOQSKabcdefgh
#1: タンパク質 | 分子量: 50107.238 Da / 分子数: 9 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #2: タンパク質 | 分子量: 49907.770 Da / 分子数: 9 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #3: タンパク質 | 分子量: 39900.332 Da / 分子数: 9 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() |
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-非ポリマー , 5種, 54分子 








#4: 化合物 | ChemComp-GTP / #5: 化合物 | ChemComp-MG / #6: 化合物 | ChemComp-GDP / #7: 化合物 | ChemComp-TA1 / #8: 化合物 | ChemComp-ANP / |
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-詳細
研究の焦点であるリガンドがあるか | Y |
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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 |
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分子量 |
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由来(天然) |
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由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||||||||||||||
緩衝液 | pH: 8 詳細: cryoEM buffer (50 mM Tris-HCl, pH 8.0, 1 mM MgCl2, 1 mM EGTA, 1 mM DTT supplemented with 2mM AMPPNP) | ||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: Highly purified, glycerol-free tubulin (Cytoskeleton, Inc.) was resuspended in BRB80 buffer (80 mM PIPES-KOH, pH 6.8, 1 mM MgCl2, 1 mM EGTA, 1 mM DTT) to a concentration of 10 mg/mL. To ...詳細: Highly purified, glycerol-free tubulin (Cytoskeleton, Inc.) was resuspended in BRB80 buffer (80 mM PIPES-KOH, pH 6.8, 1 mM MgCl2, 1 mM EGTA, 1 mM DTT) to a concentration of 10 mg/mL. To prepare Taxol-stabilized microtubules, tubulin was polymerized with a stepwise addition of Taxol as follows: 20 uL of tubulin stock was thawed quickly and placed on ice. 10 uL of BRB80 supplemented with 3 mM GTP were added and the mixture was transferred to a 37 C water bath. After 15, 30, and 45 minutes, additions of 0.5, 0.5, and 1.0 uL of 2 mM Taxol were added by gentle swirling. The mixture was then incubated for an additional 1 h at 37C. Purified Kip3 438 protein was buffer exchanged to cryoEM buffer (50 mM Tris-HCl, pH 8.0, 1 mM MgCl2, 1 mM EGTA, 1 mM DTT supplemented with 2 mM AMPPNP) and desalted using a ZEBA spin desalting column. The protein was recovered by centrifugation at 15,000 rcf for 2 min. A final spin at 30,000 x g in a TLA 100 rotor (Beckman) for 10 min at 4 C was carried out to remove big aggregates. | ||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのタイプ: C-flat-1.2/1.3 | ||||||||||||||||||||||||
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: 22 K |
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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: FEI TITAN KRIOS 詳細: Images were recorded using a semi-automated acquisition program Serial EM with a defocus range from 1.5 to 3.5 um. |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD |
試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 4 sec. / 電子線照射量: 40 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 撮影したグリッド数: 1 / 実像数: 1194 詳細: Final accumulated electron doses were 40 electrons/A2. Images were collected in super-resolution mode. The total exposure time was 4 seconds, fractionated into 20 subframes, each with an exposure time of 0.2 s. |
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解析
EMソフトウェア |
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CTF補正 | 詳細: The contrast transfer function (CTF) was estimated using CTFFIND4 [(Rohou and Grigorieff, 2015) CTFFIND4: Fast and accurate] with a 500 um step search. A second CTFFIND run with a 100 um step ...詳細: The contrast transfer function (CTF) was estimated using CTFFIND4 [(Rohou and Grigorieff, 2015) CTFFIND4: Fast and accurate] with a 500 um step search. A second CTFFIND run with a 100 um step search was carried out to refine the initial defocus values. Micrographs whose estimated resolution was lower than 8 Angstrom with 0.8 confidence were excluded. タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: -25.76 ° / 軸方向距離/サブユニット: 8.55 Å / らせん対称軸の対称性: C14 | ||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 67040 詳細: Inspection, defocus estimation, microtubule picking, and stack creation were performed within the Appion processing environment (Lander et al., 2009). Images were selected for processing on ...詳細: Inspection, defocus estimation, microtubule picking, and stack creation were performed within the Appion processing environment (Lander et al., 2009). Images were selected for processing on the basis of high decoration, straight MTs, and the absence of crystalline ice. | ||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 14934 詳細: Pseudo-helical symmetry was applied during the reconstruction step 対称性のタイプ: HELICAL | ||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 100 / プロトコル: OTHER / 空間: REAL Target criteria: Overall correlation of the residues to the map 詳細: Multiple rounds of refinement were carried out against one half map (training map), and the other half map (validation map) was used to monitor overfitting based on the procedure described in ...詳細: Multiple rounds of refinement were carried out against one half map (training map), and the other half map (validation map) was used to monitor overfitting based on the procedure described in Wang et al. elife, 2016. It is to note that the molecular interactions of ligand-protein were restrained to the initial poses adapted from the high-resolution structures during structure refinement. | ||||||||||||||||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / Source name: PDB / タイプ: experimental model
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