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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: 8tkq | |||||||||
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タイトル | Cryo-EM structure of human full-length RAD52 | |||||||||
![]() | DNA repair protein RAD52 homolog | |||||||||
![]() | RECOMBINATION / DNA repair | |||||||||
機能・相同性 | ![]() double-strand break repair via single-strand annealing / DNA double-strand break processing involved in repair via single-strand annealing / DNA recombinase assembly / mitotic recombination / regulation of nucleotide-excision repair / HDR through MMEJ (alt-NHEJ) / HDR through Single Strand Annealing (SSA) / SUMOylation of DNA damage response and repair proteins / double-strand break repair via homologous recombination / protein-DNA complex ...double-strand break repair via single-strand annealing / DNA double-strand break processing involved in repair via single-strand annealing / DNA recombinase assembly / mitotic recombination / regulation of nucleotide-excision repair / HDR through MMEJ (alt-NHEJ) / HDR through Single Strand Annealing (SSA) / SUMOylation of DNA damage response and repair proteins / double-strand break repair via homologous recombination / protein-DNA complex / double-strand break repair / single-stranded DNA binding / cellular response to oxidative stress / DNA recombination / protein-containing complex / DNA binding / nucleoplasm / identical protein binding / nucleus 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: 2.5 Å | |||||||||
![]() | Schnicker, N.J. / Razzaghi, M. / Spies, M. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: The RAD52 double-ring remodels replication forks restricting fork reversal. 著者: Masayoshi Honda / Mortezaali Razzaghi / Paras Gaur / Eva Malacaria / Giorgia Marozzi / Ludovica Di Biagi / Francesca Antonella Aiello / Emeleeta A Paintsil / Andrew J Stanfield / Bailey J ...著者: Masayoshi Honda / Mortezaali Razzaghi / Paras Gaur / Eva Malacaria / Giorgia Marozzi / Ludovica Di Biagi / Francesca Antonella Aiello / Emeleeta A Paintsil / Andrew J Stanfield / Bailey J Deppe / Lokesh Gakhar / Nicholas J Schnicker / M Ashley Spies / Pietro Pichierri / Maria Spies / ![]() ![]() 要旨: Human RAD52 is a multifunctional DNA repair protein involved in several cellular events that support genome stability, including protection of stalled DNA replication forks from excessive degradation. ...Human RAD52 is a multifunctional DNA repair protein involved in several cellular events that support genome stability, including protection of stalled DNA replication forks from excessive degradation. In its gatekeeper role, RAD52 binds to and stabilizes stalled replication forks during replication stress, protecting them from reversal by SMARCAL1 motor. The structural and molecular mechanism of the RAD52-mediated fork protection remains elusive. Here, using P1 nuclease sensitivity, biochemical and single-molecule analyses, we show that RAD52 dynamically remodels replication forks through its strand exchange activity. The presence of the single-stranded DNA binding protein RPA at the fork modulates the kinetics of the strand exchange without impeding the reaction outcome. Mass photometry and single-particle cryo-electron microscopy show that the replication fork promotes a unique nucleoprotein structure containing head-to-head arrangement of two undecameric RAD52 rings with an extended positively charged surface that accommodates all three arms of the replication fork. We propose that the formation and continuity of this surface is important for the strand exchange reaction and for competition with SMARCAL1. | |||||||||
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 | ![]() | 379.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 295.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 41357MC 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: 48404.020 Da / 分子数: 11 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() 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: 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: Human RAD52 undecameric structure / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT | ||||||||||||||||||||
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分子量 | 値: 0.532 MDa / 実験値: YES | ||||||||||||||||||||
由来(天然) | 生物種: ![]() | ||||||||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | ||||||||||||||||||||
緩衝液 | pH: 9 / 詳細: 20 mM Tris pH 9, 200 mM KCl, 1 mM DTT | ||||||||||||||||||||
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 / 詳細: Sample was made from frozen protein | ||||||||||||||||||||
試料支持 | 詳細: -15 mA / 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: UltrAuFoil 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: 277 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: TFS KRIOS 詳細: No tilt data and tilted data (30 deg) was collected at the same time and processed together |
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): 2200 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm / C2レンズ絞り径: 70 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 | 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 撮影したグリッド数: 2 / 実像数: 11288 |
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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 | ||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 2261059 詳細: Template based picking from no tilt and 30 deg tilt data to deal with preferred orientation | ||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C11 (11回回転対称) | ||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 2.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 623559 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 130.2 / プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: Cross-correlation coefficient 詳細: Initial fitting was done in Chimera followed by refinement with Namdinator and then PHENIX alone | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 1KN0 Accession code: 1KN0 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||||||||||
拘束条件 |
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