+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-21980 | |||||||||
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タイトル | Bridging of double-strand DNA break activates PARP2/HPF1 to modify chromatin | |||||||||
マップデータ | PARP2/HPF1_Nucleosome complex | |||||||||
試料 |
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キーワード | DNA repair / PARP1 / PARP2 / HPF1 / ADP-ribosylation / chromatin / histone modifications / GENE REGULATION | |||||||||
機能・相同性 | 機能・相同性情報 protein ADP-ribosyltransferase-substrate adaptor activity / regulation of protein ADP-ribosylation / hippocampal neuron apoptotic process / response to oxygen-glucose deprivation / poly-ADP-D-ribose binding / positive regulation of cell growth involved in cardiac muscle cell development / poly-ADP-D-ribose modification-dependent protein binding / NAD+-protein-serine ADP-ribosyltransferase activity / NAD DNA ADP-ribosyltransferase activity / NAD+-protein-aspartate ADP-ribosyltransferase activity ...protein ADP-ribosyltransferase-substrate adaptor activity / regulation of protein ADP-ribosylation / hippocampal neuron apoptotic process / response to oxygen-glucose deprivation / poly-ADP-D-ribose binding / positive regulation of cell growth involved in cardiac muscle cell development / poly-ADP-D-ribose modification-dependent protein binding / NAD+-protein-serine ADP-ribosyltransferase activity / NAD DNA ADP-ribosyltransferase activity / NAD+-protein-aspartate ADP-ribosyltransferase activity / NAD+-protein-glutamate ADP-ribosyltransferase activity / DNA ADP-ribosylation / HDR through MMEJ (alt-NHEJ) / NAD+ ADP-ribosyltransferase / protein auto-ADP-ribosylation / DNA repair-dependent chromatin remodeling / protein poly-ADP-ribosylation / NAD+-protein ADP-ribosyltransferase activity / site of DNA damage / decidualization / NAD+-protein poly-ADP-ribosyltransferase activity / 転移酵素; グリコシル基を移すもの; 五炭糖残基を移すもの / nucleosome binding / POLB-Dependent Long Patch Base Excision Repair / extrinsic apoptotic signaling pathway / nucleotidyltransferase activity / DNA Damage Recognition in GG-NER / base-excision repair / Dual Incision in GG-NER / Formation of Incision Complex in GG-NER / structural constituent of chromatin / nucleosome / double-strand break repair / nucleosome assembly / histone binding / damaged DNA binding / protein heterodimerization activity / DNA repair / DNA damage response / chromatin binding / chromatin / nucleolus / DNA binding / nucleoplasm / nucleus 類似検索 - 分子機能 | |||||||||
生物種 | African clawed frog (アフリカツメガエル) / synthetic construct (人工物) / Homo sapiens (ヒト) / Xenopus laevis (アフリカツメガエル) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 10.0 Å | |||||||||
データ登録者 | Halic M / Bilokapic S | |||||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Nature / 年: 2020 タイトル: Bridging of DNA breaks activates PARP2-HPF1 to modify chromatin. 著者: Silvija Bilokapic / Marcin J Suskiewicz / Ivan Ahel / Mario Halic / 要旨: Breaks in DNA strands recruit the protein PARP1 and its paralogue PARP2 to modify histones and other substrates through the addition of mono- and poly(ADP-ribose) (PAR). In the DNA damage responses, ...Breaks in DNA strands recruit the protein PARP1 and its paralogue PARP2 to modify histones and other substrates through the addition of mono- and poly(ADP-ribose) (PAR). In the DNA damage responses, this post-translational modification occurs predominantly on serine residues and requires HPF1, an accessory factor that switches the amino acid specificity of PARP1 and PARP2 from aspartate or glutamate to serine. Poly(ADP) ribosylation (PARylation) is important for subsequent chromatin decompaction and provides an anchor for the recruitment of downstream signalling and repair factors to the sites of DNA breaks. Here, to understand the molecular mechanism by which PARP enzymes recognize DNA breaks within chromatin, we determined the cryo-electron-microscopic structure of human PARP2-HPF1 bound to a nucleosome. This showed that PARP2-HPF1 bridges two nucleosomes, with the broken DNA aligned in a position suitable for ligation, revealing the initial step in the repair of double-strand DNA breaks. The bridging induces structural changes in PARP2 that signal the recognition of a DNA break to the catalytic domain, which licenses HPF1 binding and PARP2 activation. Our data suggest that active PARP2 cycles through different conformational states to exchange NAD and substrate, which may enable PARP enzymes to act processively while bound to chromatin. The processes of PARP activation and the PARP catalytic cycle we describe can explain mechanisms of resistance to PARP inhibitors and will aid the development of better inhibitors as cancer treatments. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_21980.map.gz | 336.9 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-21980-v30.xml emd-21980.xml | 21.8 KB 21.8 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_21980.png | 32.8 KB | ||
Filedesc metadata | emd-21980.cif.gz | 6.8 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-21980 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-21980 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_21980_validation.pdf.gz | 433.9 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_21980_full_validation.pdf.gz | 433.5 KB | 表示 | |
XML形式データ | emd_21980_validation.xml.gz | 7.8 KB | 表示 | |
CIF形式データ | emd_21980_validation.cif.gz | 8.9 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-21980 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-21980 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_21980.map.gz / 形式: CCP4 / 大きさ: 421.9 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | PARP2/HPF1_Nucleosome complex | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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: 1.06 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
-試料の構成要素
+全体 : Histone H3.2, Histone H4, Histone H2A type 1, Histone H2B 1.1, Hi...
+超分子 #1: Histone H3.2, Histone H4, Histone H2A type 1, Histone H2B 1.1, Hi...
+超分子 #2: Histone H3.2, Histone H4, Histone H2A type 1, Histone H2B 1.1
+超分子 #3: DNA
+超分子 #4: Histone PARylation factor 1, Poly [ADP-ribose] polymerase 2
+分子 #1: Histone H3.2
+分子 #2: Histone H4
+分子 #3: Histone H2A
+分子 #4: Histone H2B 1.1
+分子 #7: Histone PARylation factor 1
+分子 #8: Poly [ADP-ribose] polymerase 2
+分子 #5: DNA (167-MER)
+分子 #6: DNA (167-MER)
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 0.1 mg/mL |
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緩衝液 | pH: 7.5 |
凍結 | 凍結剤: ETHANE |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 検出モード: COUNTING / 平均電子線量: 80.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |