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基本情報
登録情報 | データベース: PDB / ID: 5h1c | |||||||||||||||||||||
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タイトル | Human RAD51 post-synaptic complexes | |||||||||||||||||||||
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![]() | DNA BINDING PROTEIN/DNA / DNA repair / ATPase / homologous recombination / DNA BINDING PROTEIN-DNA complex | |||||||||||||||||||||
機能・相同性 | ![]() presynaptic intermediate filament cytoskeleton / response to glucoside / mitotic recombination-dependent replication fork processing / chromosome organization involved in meiotic cell cycle / cellular response to camptothecin / DNA recombinase assembly / telomere maintenance via telomere lengthening / double-strand break repair involved in meiotic recombination / nuclear ubiquitin ligase complex / cellular response to cisplatin ...presynaptic intermediate filament cytoskeleton / response to glucoside / mitotic recombination-dependent replication fork processing / chromosome organization involved in meiotic cell cycle / cellular response to camptothecin / DNA recombinase assembly / telomere maintenance via telomere lengthening / double-strand break repair involved in meiotic recombination / nuclear ubiquitin ligase complex / cellular response to cisplatin / DNA strand invasion / cellular response to hydroxyurea / mitotic recombination / lateral element / DNA strand exchange activity / replication-born double-strand break repair via sister chromatid exchange / telomere maintenance via recombination / Impaired BRCA2 binding to PALB2 / regulation of DNA damage checkpoint / single-stranded DNA helicase activity / reciprocal meiotic recombination / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / Resolution of D-loop Structures through Holliday Junction Intermediates / HDR through Single Strand Annealing (SSA) / ATP-dependent DNA damage sensor activity / regulation of double-strand break repair via homologous recombination / nuclear chromosome / Impaired BRCA2 binding to RAD51 / Transcriptional Regulation by E2F6 / replication fork processing / Presynaptic phase of homologous DNA pairing and strand exchange / ATP-dependent activity, acting on DNA / response to X-ray / interstrand cross-link repair / condensed chromosome / DNA polymerase binding / male germ cell nucleus / condensed nuclear chromosome / meiotic cell cycle / cellular response to ionizing radiation / double-strand break repair via homologous recombination / cellular response to gamma radiation / PML body / Meiotic recombination / HDR through Homologous Recombination (HRR) / response to toxic substance / single-stranded DNA binding / site of double-strand break / double-stranded DNA binding / DNA recombination / chromosome, telomeric region / mitochondrial matrix / response to xenobiotic stimulus / DNA repair / centrosome / DNA damage response / chromatin binding / chromatin / nucleolus / perinuclear region of cytoplasm / enzyme binding / protein-containing complex / ATP hydrolysis activity / mitochondrion / nucleoplasm / ATP binding / identical protein binding / nucleus / cytosol / 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: 4.5 Å | |||||||||||||||||||||
![]() | Xu, J. / Zhao, L. / Xu, Y. / Zhao, W. / Sung, P. / Wang, H.W. | |||||||||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Cryo-EM structures of human RAD51 recombinase filaments during catalysis of DNA-strand exchange. 著者: Jingfei Xu / Lingyun Zhao / Yuanyuan Xu / Weixing Zhao / Patrick Sung / Hong-Wei Wang / ![]() ![]() 要旨: The central step in eukaryotic homologous recombination (HR) is ATP-dependent DNA-strand exchange mediated by the Rad51 recombinase. In this process, Rad51 assembles on single-stranded DNA (ssDNA) ...The central step in eukaryotic homologous recombination (HR) is ATP-dependent DNA-strand exchange mediated by the Rad51 recombinase. In this process, Rad51 assembles on single-stranded DNA (ssDNA) and generates a helical filament that is able to search for and invade homologous double-stranded DNA (dsDNA), thus leading to strand separation and formation of new base pairs between the initiating ssDNA and the complementary strand within the duplex. Here, we used cryo-EM to solve the structures of human RAD51 in complex with DNA molecules, in presynaptic and postsynaptic states, at near-atomic resolution. Our structures reveal both conserved and distinct structural features of the human RAD51-DNA complexes compared with their prokaryotic counterpart. Notably, we also captured the structure of an arrested synaptic complex. Our results provide new insight into the molecular mechanisms of the DNA homology search and strand-exchange processes. | |||||||||||||||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 190.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 147.7 KB | 表示 | ![]() |
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その他 | ![]() |
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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: 37008.074 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: Q06609 #2: DNA鎖 | | 分子量: 2692.778 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() #3: DNA鎖 | | 分子量: 2773.904 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() #4: 化合物 | #5: 化合物 | Has protein modification | 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: FILAMENT / 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 | 値: 24.18 kDa/nm / 実験値: NO | ||||||||||||||||||||||||||||||
由来(組換発現) | 生物種: ![]() | ||||||||||||||||||||||||||||||
緩衝液 | pH: 7.5 詳細: 25mM Tris-HCl, pH 7.5, 50mM KCl, 1mM dithiothreitol, 1mM AMP-PNP and 2mM MgCl2 | ||||||||||||||||||||||||||||||
試料 | 濃度: 0.075 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 | ||||||||||||||||||||||||||||||
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: 289 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 |
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): 2500 nm / 最小 デフォーカス(公称値): 1500 nm / Calibrated defocus min: 1500 nm / 最大 デフォーカス(補正後): 2500 nm / Cs: 2.7 mm / C2レンズ絞り径: 70 µm |
撮影 | 平均露光時間: 8 sec. / 電子線照射量: 50 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: 2 / 実像数: 528 |
画像スキャン | サンプリングサイズ: 5 µm / 横: 7676 / 縦: 7420 / 動画フレーム数/画像: 32 / 利用したフレーム数/画像: 3-14 |
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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 ONLY | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: 56.18 ° / 軸方向距離/サブユニット: 15.8 Å / らせん対称軸の対称性: C1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 41146 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 30194 / アルゴリズム: BACK PROJECTION / クラス平均像の数: 78 / 対称性のタイプ: HELICAL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | 空間: REAL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 1SZP PDB chain-ID: E / Accession code: 1SZP / Pdb chain residue range: 80-395 / Source name: PDB / タイプ: experimental model |