+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6wvr | ||||||
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タイトル | Tubulin dimers from a 13-protofilament, Taxol stabilized microtubule | ||||||
要素 |
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キーワード | STRUCTURAL PROTEIN / Microtubule | ||||||
機能・相同性 | 機能・相同性情報 Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Intraflagellar transport / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / COPI-dependent Golgi-to-ER retrograde traffic ...Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Intraflagellar transport / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / COPI-dependent Golgi-to-ER retrograde traffic / COPI-independent Golgi-to-ER retrograde traffic / COPI-mediated anterograde transport / RHO GTPases activate IQGAPs / RHO GTPases Activate Formins / MHC class II antigen presentation / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / Aggrephagy / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / Recruitment of NuMA to mitotic centrosomes / Hedgehog 'off' state / positive regulation of axon guidance / intercellular bridge / microtubule-based process / structural constituent of cytoskeleton / cerebral cortex development / mitotic spindle / microtubule cytoskeleton organization / microtubule cytoskeleton / mitotic cell cycle / nervous system development / 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 / protein heterodimerization activity / GTPase activity / GTP binding / metal ion binding / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | Bos taurus (ウシ) | ||||||
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: 2.9 Å | ||||||
データ登録者 | Debs, G.E. / Cha, M. / Huehn, A.R. / Sindelar, C.V. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2020 タイトル: Dynamic and asymmetric fluctuations in the microtubule wall captured by high-resolution cryoelectron microscopy. 著者: Garrett E Debs / Michael Cha / Xueqi Liu / Andrew R Huehn / Charles V Sindelar / 要旨: Microtubules are tubular polymers with essential roles in numerous cellular activities. Structures of microtubules have been captured at increasing resolution by cryo-EM. However, dynamic properties ...Microtubules are tubular polymers with essential roles in numerous cellular activities. Structures of microtubules have been captured at increasing resolution by cryo-EM. However, dynamic properties of the microtubule are key to its function, and this behavior has proved difficult to characterize at a structural level due to limitations in existing structure determination methods. We developed a high-resolution cryo-EM refinement method that divides an imaged microtubule into its constituent protofilaments, enabling deviations from helicity and other sources of heterogeneity to be quantified and corrected for at the single-subunit level. We demonstrate that this method improves the resolution of microtubule 3D reconstructions and substantially reduces anisotropic blurring artifacts, compared with methods that utilize helical symmetry averaging. Moreover, we identified an unexpected, discrete behavior of the m-loop, which mediates lateral interactions between neighboring protofilaments and acts as a flexible hinge between them. The hinge angle adopts preferred values corresponding to distinct conformations of the m-loop that are incompatible with helical symmetry. These hinge angles fluctuate in a stochastic manner, and perfectly cylindrical microtubule conformations are thus energetically and entropically penalized. The hinge angle can diverge further from helical symmetry at the microtubule seam, generating a subpopulation of highly distorted microtubules. However, the seam-distorted subpopulation disappears in the presence of Taxol, a microtubule stabilizing agent. These observations provide clues into the structural origins of microtubule flexibility and dynamics and highlight the role of structural polymorphism in defining microtubule behavior. | ||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6wvr.cif.gz | 565.4 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6wvr.ent.gz | 454.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6wvr.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 | 6wvr_validation.pdf.gz | 1.6 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6wvr_full_validation.pdf.gz | 1.6 MB | 表示 | |
XML形式データ | 6wvr_validation.xml.gz | 53.1 KB | 表示 | |
CIF形式データ | 6wvr_validation.cif.gz | 81.5 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/wv/6wvr ftp://data.pdbj.org/pub/pdb/validation_reports/wv/6wvr | HTTPS FTP |
-関連構造データ
-リンク
-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 , 2種, 4分子 ACBD
#1: タンパク質 | 分子量: 50204.445 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Bos taurus (ウシ) / 参照: UniProt: P81947 #2: タンパク質 | 分子量: 49953.797 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Bos taurus (ウシ) / 参照: UniProt: E1BJB1, UniProt: Q6B856*PLUS |
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-非ポリマー , 4種, 8分子
#3: 化合物 | #4: 化合物 | #5: 化合物 | #6: 化合物 | |
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-詳細
研究の焦点であるリガンドがあるか | 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: FILAMENT / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: Microtubules stabilized with Taxol in the presence of a low concentration of Kinesin Dimer and ADP タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: #1-#2 / 由来: NATURAL |
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分子量 | 実験値: NO |
由来(天然) | 生物種: Bos taurus (ウシ) |
緩衝液 | pH: 6.8 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
-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 |
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 |
撮影 | 電子線照射量: 66 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) |
画像スキャン | 動画フレーム数/画像: 40 / 利用したフレーム数/画像: 2-15 |
-解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||
3次元再構成 | 解像度: 2.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 852332 / 対称性のタイプ: POINT | ||||||||||||||||||
原子モデル構築 | 3D fitting-ID: 1 / Accession code: 3J8X / Initial refinement model-ID: 1 / PDB-ID: 3J8X / Source name: PDB / タイプ: experimental model
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