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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: 9mmm | |||||||||||||||||||||||||||||||||
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| タイトル | H2AX containing nucleosomes, Parallel stack | |||||||||||||||||||||||||||||||||
要素 |
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キーワード | NUCLEAR PROTEIN / phosphorylation / nucleosome / nucleosome stacking | |||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報XY body / protein localization to site of double-strand break / chromatin-protein adaptor activity / response to ionizing radiation / negative regulation of tumor necrosis factor-mediated signaling pathway / site of DNA damage / negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus ...XY body / protein localization to site of double-strand break / chromatin-protein adaptor activity / response to ionizing radiation / negative regulation of tumor necrosis factor-mediated signaling pathway / site of DNA damage / negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / telomere organization / Interleukin-7 signaling / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / RNA Polymerase I Promoter Opening / epigenetic regulation of gene expression / Inhibition of DNA recombination at telomere / Assembly of the ORC complex at the origin of replication / Meiotic synapsis / DNA damage checkpoint signaling / SUMOylation of chromatin organization proteins / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / positive regulation of DNA repair / DNA methylation / replication fork / Condensation of Prophase Chromosomes / Chromatin modifications during the maternal to zygotic transition (MZT) / SIRT1 negatively regulates rRNA expression / HCMV Late Events / condensed nuclear chromosome / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / male germ cell nucleus / Regulation of endogenous retroelements by KRAB-ZFP proteins / innate immune response in mucosa / Defective pyroptosis / meiotic cell cycle / Negative Regulation of CDH1 Gene Transcription / HDACs deacetylate histones / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / RNA Polymerase I Promoter Escape / Nonhomologous End-Joining (NHEJ) / lipopolysaccharide binding / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / HDMs demethylate histones / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / double-strand break repair via homologous recombination / G2/M DNA damage checkpoint / NoRC negatively regulates rRNA expression / B-WICH complex positively regulates rRNA expression / PKMTs methylate histone lysines / DNA Damage/Telomere Stress Induced Senescence / Pre-NOTCH Transcription and Translation / Meiotic recombination / Activation of anterior HOX genes in hindbrain development during early embryogenesis / Transcriptional regulation of granulopoiesis / RMTs methylate histone arginines / HCMV Early Events / structural constituent of chromatin / heterochromatin formation / nucleosome / antimicrobial humoral immune response mediated by antimicrobial peptide / double-strand break repair / nucleosome assembly / antibacterial humoral response / E3 ubiquitin ligases ubiquitinate target proteins / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / site of double-strand break / HATs acetylate histones / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Factors involved in megakaryocyte development and platelet production / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / chromatin organization / Processing of DNA double-strand break ends / Senescence-Associated Secretory Phenotype (SASP) / histone binding / spermatogenesis / Oxidative Stress Induced Senescence / Estrogen-dependent gene expression / killing of cells of another organism / defense response to Gram-negative bacterium / damaged DNA binding / chromosome, telomeric region / Ub-specific processing proteases / nuclear speck / defense response to Gram-positive bacterium / cadherin binding / protein heterodimerization activity / Amyloid fiber formation / DNA damage response / centrosome / enzyme binding / protein-containing complex 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||||||||||||||||||||||||||
| 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: 4 Å | |||||||||||||||||||||||||||||||||
データ登録者 | Panigrahi, R. / Edwards, R. / Glover, J.N.M. | |||||||||||||||||||||||||||||||||
| 資金援助 | カナダ, 1件
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引用 | ジャーナル: Nucleic Acids Res / 年: 2025タイトル: Structural insights into γH2Ax containing nucleosomes. 著者: Rashmi Panigrahi / Ross Edwards / Md Touhidul Islam / Jun Lu / Ayodeji Kulepa / Tae Hwan Kim / J N Mark Glover / ![]() 要旨: The phosphorylation of the histone variant H2AX on the nucleosome, yielding γH2AX, acts as a 'master control switch', signaling the recruitment of DNA repair factors at DNA double-stranded break ...The phosphorylation of the histone variant H2AX on the nucleosome, yielding γH2AX, acts as a 'master control switch', signaling the recruitment of DNA repair factors at DNA double-stranded break sites. This phosphorylation is recognized by BRCA1 carboxy-terminal (BRCT) domains of specific repair proteins. Using cryogenic electron microscopy (cryo-EM), we provide structural insights into diverse mononucleosome architectures and inter-nucleosomal interactions in the presence of H2AX, mimicking nucleosomes during DNA repair. We resolved three distinct stacked structures where the nucleosomal dyad axes and disk planes align parallel. The inter-nucleosomal interactions involve unique contacts mediated by the H4 N-terminal tail, exposed H2B elements, and DNA. Geometric analysis of stacking constraints, including published structures, reveals a tight distribution of rotational parameters around 0o, with the greatest variability in the translational parameter 'slide'. Our studies indicate that phosphorylation-dependent binding of BRCT domains with γH2AX nucleosomes disrupts stacking. However, no clear densities for BRCT proteins were observed, indicative of dynamic interactions. Molecular simulations replicate the stability of BRCT binding to γH2AX but do not indicate stable docked conformations of BRCT to nucleosome. We propose that BRCT recognition of γH2AX nucleosomes could contribute to chromatin decondensation during DNA damage signaling, exposing the nucleosomal acidic patch for repair factor recognition. | |||||||||||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 9mmm.cif.gz | 904.1 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9mmm.ent.gz | 724.6 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9mmm.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/mm/9mmm ftp://data.pdbj.org/pub/pdb/validation_reports/mm/9mmm | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 48394MC ![]() 9mllC ![]() 9mlnC ![]() 9mlrC ![]() 9mlsC ![]() 9mmkC ![]() 9mmnC ![]() 9mmoC ![]() 9mmtC 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 F&H 検索 |
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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
-タンパク質 , 4種, 16分子 AELPBFMQCGNRDHOS
| #1: タンパク質 | 分子量: 17907.770 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト)遺伝子: H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, ...遺伝子: H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, HIST1H3I, H3C12, H3FJ, HIST1H3J 発現宿主: ![]() #2: タンパク質 | 分子量: 11394.426 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト)遺伝子: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, ...遺伝子: HIST1H4A, H4/A, H4FA, HIST1H4B, H4/I, H4FI, HIST1H4C, H4/G, H4FG, HIST1H4D, H4/B, H4FB, HIST1H4E, H4/J, H4FJ, HIST1H4F, H4/C, H4FC, HIST1H4H, H4/H, H4FH, HIST1H4I, H4/M, H4FM, HIST1H4J, H4/E, H4FE, HIST1H4K, H4/D, H4FD, HIST1H4L, H4/K, H4FK, HIST2H4A, H4/N, H4F2, H4FN, HIST2H4, HIST2H4B, H4/O, H4FO, HIST4H4 発現宿主: ![]() #3: タンパク質 | 分子量: 17715.230 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: H2AX, H2AFX / 発現宿主: ![]() #4: タンパク質 | 分子量: 13935.239 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: HIST1H2BJ, H2BFR / 発現宿主: ![]() |
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-DNA鎖 , 2種, 4分子 IXJY
| #5: DNA鎖 | 分子量: 44520.383 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: ![]() #6: DNA鎖 | 分子量: 44991.660 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: ![]() |
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-詳細
| 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: gamma-H2AX containing nucleosome / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: ![]() |
| 緩衝液 | pH: 7.2 |
| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 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: TFS KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: SPOT SCAN |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 1000 nm |
| 撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
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解析
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3次元再構成 | 解像度: 4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 157901 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)
カナダ, 1件
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FIELD EMISSION GUN