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基本情報
登録情報 | データベース: EMDB / ID: EMD-5038 | |||||||||
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タイトル | 11-Angstrom cryo-EM reconstruction of nucleotide-free Nod complexed to the 13-protofilament microtubule. | |||||||||
![]() | 11-Angstrom cryo-EM reconstruction of nucleotide-free Nod complexed to the 13-protofilament microtubule. | |||||||||
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![]() | kinesin / tubulin / nod / motor proteins / cytoskeletal motor | |||||||||
機能・相同性 | ![]() establishment of meiotic spindle orientation / Hedgehog 'on' state / distributive segregation / COPI-dependent Golgi-to-ER retrograde traffic / Kinesins / meiotic chromosome segregation / female meiotic nuclear division / spindle assembly involved in female meiosis I / microtubule plus-end binding / positive regulation of axon guidance ...establishment of meiotic spindle orientation / Hedgehog 'on' state / distributive segregation / COPI-dependent Golgi-to-ER retrograde traffic / Kinesins / meiotic chromosome segregation / female meiotic nuclear division / spindle assembly involved in female meiosis I / microtubule plus-end binding / positive regulation of axon guidance / kinesin complex / microtubule motor activity / microtubule-based movement / tubulin complex / microtubule-based process / cytoplasmic microtubule / positive regulation of microtubule polymerization / cellular response to interleukin-4 / structural constituent of cytoskeleton / microtubule cytoskeleton organization / neuron migration / mitotic cell cycle / double-stranded RNA binding / microtubule cytoskeleton / 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 / protein heterodimerization activity / GTPase activity / ubiquitin protein ligase binding / GTP binding / ATP hydrolysis activity / ATP binding / metal ion binding / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | unidentified (未定義) | |||||||||
手法 | らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 11.0 Å | |||||||||
![]() | Cochran JC / Sindelar CV / Mulko NK / Collins KA / Kong SE / Hawley RS / Kull FJ | |||||||||
![]() | ![]() タイトル: ATPase cycle of the nonmotile kinesin NOD allows microtubule end tracking and drives chromosome movement. 著者: Jared C Cochran / Charles V Sindelar / Natasha K Mulko / Kimberly A Collins / Stephanie E Kong / R Scott Hawley / F Jon Kull / ![]() 要旨: Segregation of nonexchange chromosomes during Drosophila melanogaster meiosis requires the proper function of NOD, a nonmotile kinesin-10. We have determined the X-ray crystal structure of the NOD ...Segregation of nonexchange chromosomes during Drosophila melanogaster meiosis requires the proper function of NOD, a nonmotile kinesin-10. We have determined the X-ray crystal structure of the NOD catalytic domain in the ADP- and AMPPNP-bound states. These structures reveal an alternate conformation of the microtubule binding region as well as a nucleotide-sensitive relay of hydrogen bonds at the active site. Additionally, a cryo-electron microscopy reconstruction of the nucleotide-free microtubule-NOD complex shows an atypical binding orientation. Thermodynamic studies show that NOD binds tightly to microtubules in the nucleotide-free state, yet other nucleotide states, including AMPPNP, are weakened. Our pre-steady-state kinetic analysis demonstrates that NOD interaction with microtubules occurs slowly with weak activation of ADP product release. Upon rapid substrate binding, NOD detaches from the microtubule prior to the rate-limiting step of ATP hydrolysis, which is also atypical for a kinesin. We propose a model for NOD's microtubule plus-end tracking that drives chromosome movement. | |||||||||
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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ヘッダ (付随情報) | ![]() ![]() | 13.5 KB 13.5 KB | 表示 表示 | ![]() |
画像 | ![]() | 155.6 KB | ||
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「今月の分子」の関連する項目 |
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注釈 | 11-Angstrom cryo-EM reconstruction of nucleotide-free Nod complexed to the 13-protofilament microtubule. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 2 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
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試料の構成要素
-全体 : Nucleotide-free Nod complexed to the 13-protofilament microtubule
全体 | 名称: Nucleotide-free Nod complexed to the 13-protofilament microtubule |
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要素 |
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-超分子 #1000: Nucleotide-free Nod complexed to the 13-protofilament microtubule
超分子 | 名称: Nucleotide-free Nod complexed to the 13-protofilament microtubule タイプ: sample / ID: 1000 集合状態: One monomer of Nod binds to one heterodimer of tubulin Number unique components: 3 |
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分子量 | 理論値: 164 KDa 手法: Theoretical MW of one Nod monomer complexed to one tubulin dimer, based on length of the protein chains. |
-分子 #1: Nod
分子 | 名称: Nod / タイプ: protein_or_peptide / ID: 1 / Name.synonym: Nod / コピー数: 1 / 集合状態: Monomer / 組換発現: Yes |
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由来(天然) | 生物種: unidentified (未定義) / 株: B834(DE3) / 細胞中の位置: cytosol |
分子量 | 理論値: 43 KDa |
組換発現 | 生物種: ![]() ![]() |
-分子 #2: microtubule
分子 | 名称: microtubule / タイプ: protein_or_peptide / ID: 2 / Name.synonym: tubulin / 集合状態: quasi-helical assembly / 組換発現: No / データベース: NCBI |
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由来(天然) | 生物種: unidentified (未定義) / 組織: brain / 細胞: cow / 細胞中の位置: cytoplasm |
分子量 | 理論値: 120 KDa |
配列 | GO: tubulin complex / InterPro: Alpha tubulin, Beta tubulin |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | らせん対称体再構成法 |
試料の集合状態 | filament |
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試料調製
緩衝液 | pH: 6.8 / 詳細: see publication |
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グリッド | 詳細: 300 mesh copper grid with homemade holey carbon film |
凍結 | 凍結剤: ETHANE / チャンバー内温度: 103 K / 装置: HOMEMADE PLUNGER 詳細: Vitrification instrument: homemade. Carried out under ambient conditions. No glow discharge was applied to the grids prior to sample application. 手法: Excess solution wicked away from grid with filter paper before blotting and plunging immediately. Less than 0.5 seconds elapsed between blotting and plunging. |
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電子顕微鏡法
顕微鏡 | JEOL 4000EX |
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温度 | 最低: 98 K / 最高: 108 K / 平均: 100 K |
アライメント法 | Legacy - 非点収差: crude, software correction used |
撮影 | カテゴリ: FILM / フィルム・検出器のモデル: KODAK SO-163 FILM デジタル化 - スキャナー: NIKON SUPER COOLSCAN 9000 デジタル化 - サンプリング間隔: 6.3 µm / 実像数: 130 / 平均電子線量: 16 e/Å2 詳細: Data from only 17 micrographs were selected for the final reconstruction. ビット/ピクセル: 16 |
電子線 | 加速電圧: 400 kV / 電子線源: LAB6 |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 4.1 mm / 最大 デフォーカス(公称値): 1.5 µm / 最小 デフォーカス(公称値): 0.7 µm / 倍率(公称値): 60000 |
試料ステージ | 試料ホルダー: Eucentric / 試料ホルダーモデル: GATAN LIQUID NITROGEN |
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画像解析
最終 再構成 | アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 11.0 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: SPIDER 詳細: Image defocus and astigmatism were determined by ctffind3. |
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CTF補正 | 詳細: Integrated with fourier inversion (similar to FREALIGN) |
最終 角度割当 | 詳細: SPIDER |
-原子モデル構築 1
初期モデル | PDB ID: |
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ソフトウェア | 名称: SITUS |
詳細 | Protocol: Rigid Body. Because Nod occupancy was low, most tubulin density was deleted using UCSF Chimera"s volume eraser prior to automatic fitting to avoid spurious fits. |
精密化 | 空間: RECIPROCAL / プロトコル: RIGID BODY FIT / 当てはまり具合の基準: Cross-correlation |
得られたモデル | ![]() PDB-3dco: |