+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8t9h | |||||||||||||||
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タイトル | Catalytic and non-catalytic mechanisms of histone H4 lysine 20 methyltransferase SUV420H1 | |||||||||||||||
要素 |
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キーワード | GENE REGULATION / Chromatin / Histone H4 modification / Methyltransferase | |||||||||||||||
機能・相同性 | 機能・相同性情報 [histone H4]-N-methyl-L-lysine20 N-methyltransferase / histone H4K20me methyltransferase activity / [histone H4]-lysine20 N-methyltransferase / histone H4K20 monomethyltransferase activity / histone H4K20 methyltransferase activity / histone H4 methyltransferase activity / positive regulation of isotype switching / condensed chromosome, centromeric region / S-adenosyl-L-methionine binding / positive regulation of double-strand break repair via nonhomologous end joining ...[histone H4]-N-methyl-L-lysine20 N-methyltransferase / histone H4K20me methyltransferase activity / [histone H4]-lysine20 N-methyltransferase / histone H4K20 monomethyltransferase activity / histone H4K20 methyltransferase activity / histone H4 methyltransferase activity / positive regulation of isotype switching / condensed chromosome, centromeric region / S-adenosyl-L-methionine binding / positive regulation of double-strand break repair via nonhomologous end joining / muscle organ development / histone methyltransferase activity / PKMTs methylate histone lysines / structural constituent of chromatin / nucleosome / nucleosome assembly / methylation / protein heterodimerization activity / DNA repair / chromatin binding / DNA binding / nucleoplasm / nucleus / metal ion binding 類似検索 - 分子機能 | |||||||||||||||
生物種 | Xenopus laevis (アフリカツメガエル) Homo sapiens (ヒト) Escherichia coli 'BL21-GoldpLysS AG' | |||||||||||||||
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: 3.37 Å | |||||||||||||||
データ登録者 | Abini-Agbomson, S. / Armache, K.-J. | |||||||||||||||
資金援助 | 米国, 4件
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引用 | ジャーナル: Mol Cell / 年: 2023 タイトル: Catalytic and non-catalytic mechanisms of histone H4 lysine 20 methyltransferase SUV420H1. 著者: Stephen Abini-Agbomson / Kristjan Gretarsson / Rochelle M Shih / Laura Hsieh / Tracy Lou / Pablo De Ioannes / Nikita Vasilyev / Rachel Lee / Miao Wang / Matthew D Simon / Jean-Paul Armache / ...著者: Stephen Abini-Agbomson / Kristjan Gretarsson / Rochelle M Shih / Laura Hsieh / Tracy Lou / Pablo De Ioannes / Nikita Vasilyev / Rachel Lee / Miao Wang / Matthew D Simon / Jean-Paul Armache / Evgeny Nudler / Geeta Narlikar / Shixin Liu / Chao Lu / Karim-Jean Armache / 要旨: SUV420H1 di- and tri-methylates histone H4 lysine 20 (H4K20me2/H4K20me3) and plays crucial roles in DNA replication, repair, and heterochromatin formation. It is dysregulated in several cancers. Many ...SUV420H1 di- and tri-methylates histone H4 lysine 20 (H4K20me2/H4K20me3) and plays crucial roles in DNA replication, repair, and heterochromatin formation. It is dysregulated in several cancers. Many of these processes were linked to its catalytic activity. However, deletion and inhibition of SUV420H1 have shown distinct phenotypes, suggesting that the enzyme likely has uncharacterized non-catalytic activities. Our cryoelectron microscopy (cryo-EM), biochemical, biophysical, and cellular analyses reveal how SUV420H1 recognizes its nucleosome substrates, and how histone variant H2A.Z stimulates its catalytic activity. SUV420H1 binding to nucleosomes causes a dramatic detachment of nucleosomal DNA from the histone octamer, which is a non-catalytic activity. We hypothesize that this regulates the accessibility of large macromolecular complexes to chromatin. We show that SUV420H1 can promote chromatin condensation, another non-catalytic activity that we speculate is needed for its heterochromatin functions. Together, our studies uncover and characterize the catalytic and non-catalytic mechanisms of SUV420H1, a key histone methyltransferase that plays an essential role in genomic stability. #1: ジャーナル: bioRxiv / 年: 2023 タイトル: Catalytic and non-catalytic mechanisms of histone H4 lysine 20 methyltransferase SUV420H1. 著者: Stephen Abini-Agbomson / Kristjan Gretarsson / Rochelle M Shih / Laura Hsieh / Tracy Lou / Pablo De Ioannes / Nikita Vasilyev / Rachel Lee / Miao Wang / Matthew Simon / Jean-Paul Armache / ...著者: Stephen Abini-Agbomson / Kristjan Gretarsson / Rochelle M Shih / Laura Hsieh / Tracy Lou / Pablo De Ioannes / Nikita Vasilyev / Rachel Lee / Miao Wang / Matthew Simon / Jean-Paul Armache / Evgeny Nudler / Geeta Narlikar / Shixin Liu / Chao Lu / Karim-Jean Armache / 要旨: The intricate regulation of chromatin plays a key role in controlling genome architecture and accessibility. Histone lysine methyltransferases regulate chromatin by catalyzing the methylation of ...The intricate regulation of chromatin plays a key role in controlling genome architecture and accessibility. Histone lysine methyltransferases regulate chromatin by catalyzing the methylation of specific histone residues but are also hypothesized to have equally important non-catalytic roles. SUV420H1 di- and tri-methylates histone H4 lysine 20 (H4K20me2/me3) and plays crucial roles in DNA replication, repair, and heterochromatin formation, and is dysregulated in several cancers. Many of these processes were linked to its catalytic activity. However, deletion and inhibition of SUV420H1 have shown distinct phenotypes suggesting the enzyme likely has uncharacterized non-catalytic activities. To characterize the catalytic and non-catalytic mechanisms SUV420H1 uses to modify chromatin, we determined cryo- EM structures of SUV420H1 complexes with nucleosomes containing histone H2A or its variant H2A.Z. Our structural, biochemical, biophysical, and cellular analyses reveal how both SUV420H1 recognizes its substrate and H2A.Z stimulates its activity, and show that SUV420H1 binding to nucleosomes causes a dramatic detachment of nucleosomal DNA from histone octamer. We hypothesize that this detachment increases DNA accessibility to large macromolecular complexes, a prerequisite for DNA replication and repair. We also show that SUV420H1 can promote chromatin condensates, another non-catalytic role that we speculate is needed for its heterochromatin functions. Together, our studies uncover and characterize the catalytic and non-catalytic mechanisms of SUV420H1, a key histone methyltransferase that plays an essential role in genomic stability. | |||||||||||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8t9h.cif.gz | 302.9 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8t9h.ent.gz | 224.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8t9h.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
文書・要旨 | 8t9h_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8t9h_full_validation.pdf.gz | 1.2 MB | 表示 | |
XML形式データ | 8t9h_validation.xml.gz | 43.1 KB | 表示 | |
CIF形式データ | 8t9h_validation.cif.gz | 64.7 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/t9/8t9h ftp://data.pdbj.org/pub/pdb/validation_reports/t9/8t9h | HTTPS FTP |
-関連構造データ
関連構造データ | 41111MC 8t9fC 8thuC 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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-要素
-タンパク質 , 5種, 9分子 AEBFCGDHK
#1: タンパク質 | 分子量: 15303.930 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) Xenopus laevis (アフリカツメガエル) 発現宿主: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) 参照: UniProt: P84233 #2: タンパク質 | 分子量: 11396.442 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) Xenopus laevis (アフリカツメガエル) 遺伝子: LOC121398084 発現宿主: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) 参照: UniProt: A0A8J1LTD2 #3: タンパク質 | 分子量: 14109.436 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) Xenopus laevis (アフリカツメガエル) 遺伝子: hist1h2aj, LOC494591, XELAEV_18003602mg 発現宿主: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) 参照: UniProt: Q6AZJ8 #4: タンパク質 | 分子量: 13655.948 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) Xenopus laevis (アフリカツメガエル) 発現宿主: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) 参照: UniProt: P02281 #7: タンパク質 | | 分子量: 44703.094 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: KMT5B 発現宿主: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) 参照: UniProt: Q4FZB7 |
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-DNA鎖 , 2種, 2分子 IJ
#5: DNA鎖 | 分子量: 44824.570 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) |
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#6: DNA鎖 | 分子量: 45304.863 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) |
-詳細
研究の焦点であるリガンドがあるか | Y |
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Has protein modification | N |
-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 |
-試料調製
構成要素 | 名称: SUV420H1-H2A.Z nucleosome complex / タイプ: COMPLEX / Entity ID: #7, #5-#6, #2, #1 / 由来: MULTIPLE SOURCES | ||||||||||||||||||||
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由来(天然) | 生物種: Xenopus laevis (アフリカツメガエル) | ||||||||||||||||||||
由来(組換発現) | 生物種: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (大腸菌) | ||||||||||||||||||||
緩衝液 | pH: 7.9 / 詳細: 50 mM HEPES pH 7.9, 100 mM NaCl, 2 mM DTT | ||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
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: 277.15 K |
-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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2400 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: GATAN K3 (6k x 4k) |
-解析
EMソフトウェア | 名称: cryoSPARC / カテゴリ: 粒子像選択 | ||||||||||||||||||||||||
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.37 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 366390 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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