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基本情報
登録情報 | データベース: PDB / ID: 8rcd | ||||||||||||||||||||||||||||||||||||
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タイトル | RAD51 nucleoprotein filament on abasic single-stranded DNA | ||||||||||||||||||||||||||||||||||||
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![]() | DNA BINDING PROTEIN / Homologous recombination / DNA replication / abasic DNA | ||||||||||||||||||||||||||||||||||||
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 / DNA recombinase assembly / cellular response to camptothecin / 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 / DNA recombinase assembly / cellular response to camptothecin / 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 / regulation of DNA damage checkpoint / Impaired BRCA2 binding to PALB2 / telomere maintenance via recombination / reciprocal meiotic recombination / single-stranded DNA helicase activity / 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) / regulation of double-strand break repair via homologous recombination / ATP-dependent DNA damage sensor activity / nuclear chromosome / Impaired BRCA2 binding to RAD51 / Transcriptional Regulation by E2F6 / replication fork processing / Presynaptic phase of homologous DNA pairing and strand exchange / response to X-ray / ATP-dependent activity, acting on DNA / 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: 3.2 Å | ||||||||||||||||||||||||||||||||||||
![]() | Appleby, R. / Pellegrini, L. | ||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: RAD51 protects abasic sites to prevent replication fork breakage. 著者: Yodhara Wijesekara Hanthi / Miguel Angel Ramirez-Otero / Robert Appleby / Anna De Antoni / Luay Joudeh / Vincenzo Sannino / Salli Waked / Alessandra Ardizzoia / Viviana Barra / Daniele ...著者: Yodhara Wijesekara Hanthi / Miguel Angel Ramirez-Otero / Robert Appleby / Anna De Antoni / Luay Joudeh / Vincenzo Sannino / Salli Waked / Alessandra Ardizzoia / Viviana Barra / Daniele Fachinetti / Luca Pellegrini / Vincenzo Costanzo / ![]() ![]() ![]() 要旨: Abasic sites are DNA lesions repaired by base excision repair. Cleavage of unrepaired abasic sites in single-stranded DNA (ssDNA) can lead to chromosomal breakage during DNA replication. How rupture ...Abasic sites are DNA lesions repaired by base excision repair. Cleavage of unrepaired abasic sites in single-stranded DNA (ssDNA) can lead to chromosomal breakage during DNA replication. How rupture of abasic DNA is prevented remains poorly understood. Here, using cryoelectron microscopy (cryo-EM), Xenopus laevis egg extracts, and human cells, we show that RAD51 nucleofilaments specifically recognize and protect abasic sites, which increase RAD51 association rate to DNA. In the absence of BRCA2 or RAD51, abasic sites accumulate as a result of DNA base methylation, oxidation, and deamination, inducing abasic ssDNA gaps that make replicating DNA fibers sensitive to APE1. RAD51 assembled on abasic DNA prevents abasic site cleavage by the MRE11-RAD50 complex, suppressing replication fork breakage triggered by an excess of abasic sites or POLθ polymerase inhibition. Our study highlights the critical role of BRCA2 and RAD51 in safeguarding against unrepaired abasic sites in DNA templates stemming from base alterations, ensuring genomic stability. | ||||||||||||||||||||||||||||||||||||
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 | ![]() | 484.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 397 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.7 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.8 MB | 表示 | |
XML形式データ | ![]() | 76.5 KB | 表示 | |
CIF形式データ | ![]() | 100.1 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 19050MC ![]() 8rcfC 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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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: 37009.125 Da / 分子数: 8 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: DNA鎖 | | 分子量: 6198.886 Da / 分子数: 1 / 由来タイプ: 合成 詳細: 3DR refers to an abasic nucleotide. The DNA oligonucleotide was chemically synthesised to contain 7 regularly spaced abasic sites. The ribose of the abasic nucleotide is a tetrahydrofurane ...詳細: 3DR refers to an abasic nucleotide. The DNA oligonucleotide was chemically synthesised to contain 7 regularly spaced abasic sites. The ribose of the abasic nucleotide is a tetrahydrofurane lacking the hydroxyl group that would naturally be present on position C1 after base hydrolysis. 由来: (合成) ![]() #3: 化合物 | ChemComp-ATP / #4: 化合物 | ChemComp-CA / 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: 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 | 名称: RAD51 nucleoprotein filament / タイプ: COMPLEX 詳細: RAD51 nucleoprotein filament on abasic single-stranded DNA Entity ID: #1-#2 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.5 |
試料 | 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: GOLD / 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 | 凍結剤: ETHANE |
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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 / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 2600 nm / 最小 デフォーカス(公称値): 800 nm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 平均露光時間: 1.33 sec. / 電子線照射量: 55.195 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 10623 詳細: Images were collected in movie-mode at 49 frames per movie |
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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: 56.3 ° / 軸方向距離/サブユニット: 16.2 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: 851378 | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 183769 / 対称性のタイプ: HELICAL | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: OTHER / 空間: REAL | ||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 8BQ2 Accession code: 8BQ2 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||
拘束条件 |
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