+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7u32 | ||||||||||||||||||
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タイトル | MVV cleaved synaptic complex (CSC) intasome at 3.4 A resolution | ||||||||||||||||||
要素 |
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キーワード | VIRAL PROTEIN/DNA / Integrase-DNA complex / hydrolase / VIRAL PROTEIN / VIRAL PROTEIN-DNA complex | ||||||||||||||||||
機能・相同性 | 機能・相同性情報 dUTP diphosphatase / dUTP diphosphatase activity / nucleotide metabolic process / 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素; アスパラギン酸プロテアーゼ / ribonuclease H / exoribonuclease H / exoribonuclease H activity / DNA integration / viral genome integration into host DNA / RNA-directed DNA polymerase ...dUTP diphosphatase / dUTP diphosphatase activity / nucleotide metabolic process / 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素; アスパラギン酸プロテアーゼ / ribonuclease H / exoribonuclease H / exoribonuclease H activity / DNA integration / viral genome integration into host DNA / RNA-directed DNA polymerase / establishment of integrated proviral latency / RNA-directed DNA polymerase activity / viral capsid / RNA-DNA hybrid ribonuclease activity / 転移酵素; リンを含む基を移すもの; 核酸を移すもの / aspartic-type endopeptidase activity / DNA recombination / DNA-directed DNA polymerase / 加水分解酵素; エステル加水分解酵素 / DNA-directed DNA polymerase activity / symbiont entry into host cell / proteolysis / DNA binding / zinc ion binding 類似検索 - 分子機能 | ||||||||||||||||||
生物種 | Visna/maedi virus EV1 KV1772 (ウイルス) synthetic construct (人工物) | ||||||||||||||||||
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: 3.46 Å | ||||||||||||||||||
データ登録者 | Shan, Z. / Pye, V.E. / Cherepanov, P. / Lyumkis, D. | ||||||||||||||||||
資金援助 | 米国, 英国, 5件
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引用 | ジャーナル: Nat Commun / 年: 2022 タイトル: Multivalent interactions essential for lentiviral integrase function. 著者: Allison Ballandras-Colas / Vidya Chivukula / Dominika T Gruszka / Zelin Shan / Parmit K Singh / Valerie E Pye / Rebecca K McLean / Gregory J Bedwell / Wen Li / Andrea Nans / Nicola J Cook / ...著者: Allison Ballandras-Colas / Vidya Chivukula / Dominika T Gruszka / Zelin Shan / Parmit K Singh / Valerie E Pye / Rebecca K McLean / Gregory J Bedwell / Wen Li / Andrea Nans / Nicola J Cook / Hind J Fadel / Eric M Poeschla / David J Griffiths / Javier Vargas / Ian A Taylor / Dmitry Lyumkis / Hasan Yardimci / Alan N Engelman / Peter Cherepanov / 要旨: A multimer of retroviral integrase (IN) synapses viral DNA ends within a stable intasome nucleoprotein complex for integration into a host cell genome. Reconstitution of the intasome from the maedi- ...A multimer of retroviral integrase (IN) synapses viral DNA ends within a stable intasome nucleoprotein complex for integration into a host cell genome. Reconstitution of the intasome from the maedi-visna virus (MVV), an ovine lentivirus, revealed a large assembly containing sixteen IN subunits. Herein, we report cryo-EM structures of the lentiviral intasome prior to engagement of target DNA and following strand transfer, refined at 3.4 and 3.5 Å resolution, respectively. The structures elucidate details of the protein-protein and protein-DNA interfaces involved in lentiviral intasome formation. We show that the homomeric interfaces involved in IN hexadecamer formation and the α-helical configuration of the linker connecting the C-terminal and catalytic core domains are critical for MVV IN strand transfer activity in vitro and for virus infectivity. Single-molecule microscopy in conjunction with photobleaching reveals that the MVV intasome can bind a variable number, up to sixteen molecules, of the lentivirus-specific host factor LEDGF/p75. Concordantly, ablation of endogenous LEDGF/p75 results in gross redistribution of MVV integration sites in human and ovine cells. Our data confirm the importance of the expanded architecture observed in cryo-EM studies of lentiviral intasomes and suggest that this organization underlies multivalent interactions with chromatin for integration targeting to active genes. | ||||||||||||||||||
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 | 7u32.cif.gz | 792.7 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7u32.ent.gz | 652.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7u32.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/u3/7u32 ftp://data.pdbj.org/pub/pdb/validation_reports/u3/7u32 | HTTPS FTP |
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-関連構造データ
関連構造データ | 26322MC 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
#1: タンパク質 | 分子量: 32368.826 Da / 分子数: 16 / 由来タイプ: 組換発現 由来: (組換発現) Visna/maedi virus EV1 KV1772 (ウイルス) 株: KV1772 / 遺伝子: pol / 発現宿主: Escherichia coli (大腸菌) 参照: UniProt: P35956, 転移酵素; リンを含む基を移すもの; 核酸を移すもの, 加水分解酵素; エステル加水分解酵素 #2: DNA鎖 | 分子量: 8943.719 Da / 分子数: 2 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) #3: DNA鎖 | 分子量: 8272.326 Da / 分子数: 2 / 由来タイプ: 合成 / 由来: (合成) synthetic construct (人工物) #4: 化合物 | ChemComp-ZN / #5: 化合物 | 研究の焦点であるリガンドがあるか | 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 |
-試料調製
構成要素 | 名称: MVV cleaved synaptic complex intasome / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: MULTIPLE SOURCES | |||||||||||||||||||||||||
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分子量 | 値: 0.48 kDa/nm / 実験値: NO | |||||||||||||||||||||||||
由来(天然) | 生物種: Streptomyces griseus (ストレプトマイシン生産菌) | |||||||||||||||||||||||||
由来(組換発現) | 生物種: Escherichia coli (大腸菌) | |||||||||||||||||||||||||
緩衝液 | pH: 6.5 | |||||||||||||||||||||||||
緩衝液成分 |
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試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: MVV CSC intasomes, assembled and purified as previously described, were applied onto R1.2/1.3 gold UltrAufoil grids, Au 300 mesh (Quantifoil). Cryo-EM grids were prepared by manually freezing ...詳細: MVV CSC intasomes, assembled and purified as previously described, were applied onto R1.2/1.3 gold UltrAufoil grids, Au 300 mesh (Quantifoil). Cryo-EM grids were prepared by manually freezing using a manual plunger in cold room at 4C and stored in liquid nitrogen for future data acquisition. | |||||||||||||||||||||||||
試料支持 | 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: Quantifoil R1.2/1.3 | |||||||||||||||||||||||||
急速凍結 | 装置: HOMEMADE PLUNGER / 凍結剤: ETHANE 詳細: Cryo-EM grids were prepared by freezing using a manual plunger in cold room at 4C |
-電子顕微鏡撮影
実験機器 | モデル: Talos Arctica / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TALOS ARCTICA 詳細: The stage was tilted to 40 degrees during data collection to account for the preferential orientation of the sample within the vitreous ice. |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 45000 X / 倍率(補正後): 54347 X / 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 / 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 | 平均露光時間: 10 sec. / 電子線照射量: 43.6 e/Å2 / 検出モード: COUNTING 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: 2295 |
画像スキャン | 横: 3838 / 縦: 3710 / 動画フレーム数/画像: 100 / 利用したフレーム数/画像: 1-100 |
-解析
ソフトウェア | 名称: PHENIX / バージョン: dev_4213: / 分類: 精密化 | ||||||||||||||||||||||||||||||||||||
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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: 926176 | ||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C2 (2回回転対称) | ||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.46 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 147860 / アルゴリズム: FOURIER SPACE / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 262 / プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: CC 詳細: The STC model refined in study, with the tDNA removed, was docked into the CSC cryoEM map using UCSF Chimera. It was observed that there were some slight differences in some domain positions, ...詳細: The STC model refined in study, with the tDNA removed, was docked into the CSC cryoEM map using UCSF Chimera. It was observed that there were some slight differences in some domain positions, to address this, individual domains that were not well fitted to the map were docked as individual domains to achieve a best-fit starting model. Two (C2 related) NTDs (aa 1-35) were removed from the model due to lack of supporting map. Adjustments were made to the model interactively using Coot and the coordinates were subjected to real-space refinement in Phenix dev-4213-000 employing C2 NCS constraints. | ||||||||||||||||||||||||||||||||||||
拘束条件 |
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