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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: 8ouy | ||||||||||||||||||
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タイトル | Human RAD51B-RAD51C-RAD51D-XRCC2 (BCDX2) complex, 3.4 A resolution | ||||||||||||||||||
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![]() | DNA BINDING PROTEIN / Complex / ssDNA-binding / ATPase / RAD51 | ||||||||||||||||||
機能・相同性 | ![]() meiotic DNA recombinase assembly / Rad51C-XRCC3 complex / Rad51B-Rad51C-Rad51D-XRCC2 complex / female meiosis sister chromatid cohesion / blastocyst growth / crossover junction DNA endonuclease activity / somite development / DNA strand invasion / Impaired BRCA2 binding to PALB2 / male meiosis I ...meiotic DNA recombinase assembly / Rad51C-XRCC3 complex / Rad51B-Rad51C-Rad51D-XRCC2 complex / female meiosis sister chromatid cohesion / blastocyst growth / crossover junction DNA endonuclease activity / somite development / DNA strand invasion / Impaired BRCA2 binding to PALB2 / male meiosis I / telomere maintenance via recombination / gamma-tubulin binding / reciprocal meiotic recombination / regulation of fibroblast apoptotic process / centrosome cycle / positive regulation of neurogenesis / sister chromatid cohesion / 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 / ATP-dependent DNA damage sensor activity / microtubule organizing center / Presynaptic phase of homologous DNA pairing and strand exchange / response to X-ray / positive regulation of G2/M transition of mitotic cell cycle / ATP-dependent activity, acting on DNA / somitogenesis / interstrand cross-link repair / neurogenesis / telomere maintenance / replication fork / meiotic cell cycle / double-strand break repair via homologous recombination / response to gamma radiation / TP53 Regulates Transcription of DNA Repair Genes / HDR through Homologous Recombination (HRR) / Meiotic recombination / multicellular organism growth / cell junction / mitotic cell cycle / single-stranded DNA binding / Factors involved in megakaryocyte development and platelet production / double-stranded DNA binding / spermatogenesis / DNA recombination / in utero embryonic development / negative regulation of neuron apoptotic process / chromosome, telomeric region / regulation of cell cycle / DNA repair / intracellular membrane-bounded organelle / positive regulation of cell population proliferation / centrosome / perinuclear region of cytoplasm / ATP hydrolysis activity / mitochondrion / DNA binding / nucleoplasm / ATP binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||||||||||||||
生物種 | ![]() | ||||||||||||||||||
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: 3.4 Å | ||||||||||||||||||
![]() | Greenhough, L.A. / Liang, C.C. / West, S.C. | ||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure and function of the RAD51B-RAD51C-RAD51D-XRCC2 tumour suppressor. 著者: Luke A Greenhough / Chih-Chao Liang / Ondrej Belan / Simone Kunzelmann / Sarah Maslen / Monica C Rodrigo-Brenni / Roopesh Anand / Mark Skehel / Simon J Boulton / Stephen C West / ![]() ![]() 要旨: Homologous recombination is a fundamental process of life. It is required for the protection and restart of broken replication forks, the repair of chromosome breaks and the exchange of genetic ...Homologous recombination is a fundamental process of life. It is required for the protection and restart of broken replication forks, the repair of chromosome breaks and the exchange of genetic material during meiosis. Individuals with mutations in key recombination genes, such as BRCA2 (also known as FANCD1), or the RAD51 paralogues RAD51B, RAD51C (also known as FANCO), RAD51D, XRCC2 (also known as FANCU) and XRCC3, are predisposed to breast, ovarian and prostate cancers and the cancer-prone syndrome Fanconi anaemia. The BRCA2 tumour suppressor protein-the product of BRCA2-is well characterized, but the cellular functions of the RAD51 paralogues remain unclear. Genetic knockouts display growth defects, reduced RAD51 focus formation, spontaneous chromosome abnormalities, sensitivity to PARP inhibitors and replication fork defects, but the precise molecular roles of RAD51 paralogues in fork stability, DNA repair and cancer avoidance remain unknown. Here we used cryo-electron microscopy, AlphaFold2 modelling and structural proteomics to determine the structure of the RAD51B-RAD51C-RAD51D-XRCC2 complex (BCDX2), revealing that RAD51C-RAD51D-XRCC2 mimics three RAD51 protomers aligned within a nucleoprotein filament, whereas RAD51B is highly dynamic. Biochemical and single-molecule analyses showed that BCDX2 stimulates the nucleation and extension of RAD51 filaments-which are essential for recombinational DNA repair-in reactions that depend on the coupled ATPase activities of RAD51B and RAD51C. Our studies demonstrate that BCDX2 orchestrates RAD51 assembly on single stranded DNA for replication fork protection and double strand break repair, in reactions that are critical for tumour avoidance. | ||||||||||||||||||
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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 | ![]() | 451.7 KB | 表示 | ![]() |
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PDB形式 | ![]() | 292.8 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 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 39.4 KB | 表示 | |
CIF形式データ | ![]() | 58.7 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-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
-DNA repair protein RAD51 homolog ... , 3種, 3分子 ABC
#1: タンパク質 | 分子量: 38296.984 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: O15315 |
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#2: タンパク質 | 分子量: 42244.609 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: O43502 |
#3: タンパク質 | 分子量: 35084.254 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: O75771 |
-タンパク質 , 1種, 1分子 D
#4: タンパク質 | 分子量: 31995.525 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: O43543 |
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-非ポリマー , 3種, 6分子 




#5: 化合物 | ChemComp-ADP / | ||
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#6: 化合物 | #7: 化合物 | |
-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: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: RAD51B-RAD51C-RAD51D-XRCC2 (BCDX2) / タイプ: COMPLEX 詳細: Recombinant BCDX2 complexes purified from Sf9 insect cells, crosslinked with 0.005% glutaraldehyde (RT, 10 minutes) in the presence of 30 nt ssDNA, and vitrified in the presence of ADP.AlFx. ...詳細: Recombinant BCDX2 complexes purified from Sf9 insect cells, crosslinked with 0.005% glutaraldehyde (RT, 10 minutes) in the presence of 30 nt ssDNA, and vitrified in the presence of ADP.AlFx. Map was enhanced using DeepEMhancer Entity ID: #1-#4 / 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: ![]() ![]() 株: Sf9 / プラスミド: pBIG-BCDX2 | |||||||||||||||||||||||||||||||||||||||||||||
緩衝液 | pH: 7.5 詳細: 25 mM HEPES pH 7.5, 100 mM NaCl, 2.5 mM MgCl2, 0.5 mM ADP.BeFx (0.5 mM ADP, 0.5 mM BeSO4, 10 mM NaF), 0.25 mM TCEP, 0.0005% Tween20 | |||||||||||||||||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.25 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | |||||||||||||||||||||||||||||||||||||||||||||
試料支持 | 詳細: 25 mA / グリッドの材料: GOLD / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: UltrAuFoil R2/2 | |||||||||||||||||||||||||||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 95 % / 凍結前の試料温度: 277.15 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 / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 3500 nm / 最小 デフォーカス(公称値): 1500 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 9 sec. / 電子線照射量: 47 e/Å2 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: 24449 詳細: 12,555 movies were collected with zero tilt, and a further 11,894 movies with a 20 degree tilt |
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解析
ソフトウェア |
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 4528940 | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 87572 / アルゴリズム: FOURIER SPACE / 詳細: Map was enhanced using DeepEMhancer / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | 空間: REAL 詳細: AlphaFold2 monomer predictions of RAD51B, RAD51C, RAD51D and XRCC2 were docked into the EM density using Dock and Rebuild in Phenix. ATP and Mg2+ were added, and the coordinates were ...詳細: AlphaFold2 monomer predictions of RAD51B, RAD51C, RAD51D and XRCC2 were docked into the EM density using Dock and Rebuild in Phenix. ATP and Mg2+ were added, and the coordinates were iteratively real space refined using Phenix and manually modified in COOT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | Source name: AlphaFold / タイプ: in silico model | ||||||||||||||||||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 54.12 Å2 | ||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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