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基本情報
登録情報 | データベース: PDB / ID: 9cmp | |||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Structure of human Argonaute2-guide-target complex in a fully paired, slicing-competent conformation | |||||||||||||||||||||||||||||||||||||||||||||
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![]() | HYDROLASE/RNA / RNAi / Argonaute / Slicing / HYDROLASE-RNA complex | |||||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() : / endoribonuclease activity, cleaving miRNA-paired mRNA / endoribonuclease activity, cleaving siRNA-paired mRNA / siRNA-mediated gene silencing by mRNA destabilization / miRNA-mediated gene silencing by mRNA destabilization / Post-transcriptional silencing by small RNAs / Competing endogenous RNAs (ceRNAs) regulate PTEN translation / Regulation of CDH11 mRNA translation by microRNAs / Regulation of NPAS4 mRNA translation / Regulation of PTEN mRNA translation ...: / endoribonuclease activity, cleaving miRNA-paired mRNA / endoribonuclease activity, cleaving siRNA-paired mRNA / siRNA-mediated gene silencing by mRNA destabilization / miRNA-mediated gene silencing by mRNA destabilization / Post-transcriptional silencing by small RNAs / Competing endogenous RNAs (ceRNAs) regulate PTEN translation / Regulation of CDH11 mRNA translation by microRNAs / Regulation of NPAS4 mRNA translation / Regulation of PTEN mRNA translation / negative regulation of amyloid precursor protein biosynthetic process / Small interfering RNA (siRNA) biogenesis / positive regulation of trophoblast cell migration / Transcriptional Regulation by MECP2 / miRNA metabolic process / RISC-loading complex / mRNA cap binding / regulatory ncRNA-mediated post-transcriptional gene silencing / RISC complex assembly / miRNA processing / miRNA-mediated gene silencing by inhibition of translation / pre-miRNA processing / RNA 7-methylguanosine cap binding / siRNA processing / regulation of synapse maturation / siRNA binding / Regulation of MITF-M-dependent genes involved in apoptosis / mRNA 3'-UTR AU-rich region binding / M-decay: degradation of maternal mRNAs by maternally stored factors / RISC complex / regulatory ncRNA-mediated gene silencing / TGFBR3 expression / Regulation of RUNX1 Expression and Activity / P-body assembly / miRNA binding / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / MicroRNA (miRNA) biogenesis / positive regulation of nuclear-transcribed mRNA poly(A) tail shortening / RNA polymerase II complex binding / Regulation of MECP2 expression and activity / core promoter sequence-specific DNA binding / Nuclear events stimulated by ALK signaling in cancer / NR1H3 & NR1H2 regulate gene expression linked to cholesterol transport and efflux / negative regulation of translational initiation / translation initiation factor activity / RNA endonuclease activity / post-embryonic development / positive regulation of translation / TP53 Regulates Metabolic Genes / Transcriptional regulation by small RNAs / P-body / MAPK6/MAPK4 signaling / Pre-NOTCH Transcription and Translation / cytoplasmic ribonucleoprotein granule / positive regulation of angiogenesis / double-stranded RNA binding / Ca2+ pathway / Estrogen-dependent gene expression / single-stranded RNA binding / postsynapse / translation / dendrite / glutamatergic synapse / positive regulation of transcription by RNA polymerase II / RNA binding / extracellular exosome / nucleoplasm / metal ion binding / nucleus / membrane / cytosol / cytoplasm 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: 3.3 Å | |||||||||||||||||||||||||||||||||||||||||||||
![]() | Mohamed, A.A. / Wang, P.Y. / Bartel, D.P. / Vos, S.M. | |||||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: The structural basis for RNA slicing by human Argonaute2. 著者: Abdallah A Mohamed / Peter Y Wang / David P Bartel / Seychelle M Vos / ![]() 要旨: Argonaute (AGO) proteins associate with guide RNAs to form complexes that slice transcripts that pair to the guide. This slicing drives post-transcriptional gene silencing through RNA interference ...Argonaute (AGO) proteins associate with guide RNAs to form complexes that slice transcripts that pair to the guide. This slicing drives post-transcriptional gene silencing through RNA interference (RNAi), which is essential for many eukaryotes and the basis for new clinical therapies. Despite this importance, structural information on eukaryotic AGOs in a fully paired, slicing-competent conformation-hypothesized to be intrinsically unstable-has been lacking. Here, we present the cryogenic electron microscopy structure of a human AGO-guide complex bound to a fully paired target, revealing structural rearrangements that enable this conformation. Critically, the N domain of AGO rotates to allow the RNA full access to the central channel and forms contacts that license rapid slicing. Moreover, a conserved loop in the PIWI domain secures the RNA near the active site to enhance slicing rate and specificity. These results explain how AGO accommodates targets possessing pairing specificity typically observed in biological and clinical slicing substrates. #1: ジャーナル: bioRxiv / 年: 2024 タイトル: The structural basis for RNA slicing by human Argonaute2. 著者: Abdallah A Mohamed / Peter Y Wang / David P Bartel / Seychelle M Vos / ![]() 要旨: Argonaute (AGO) proteins associate with guide RNAs to form complexes that slice transcripts that pair to the guide. This slicing drives post-transcriptional gene-silencing pathways that are essential ...Argonaute (AGO) proteins associate with guide RNAs to form complexes that slice transcripts that pair to the guide. This slicing drives post-transcriptional gene-silencing pathways that are essential for many eukaryotes and the basis for new clinical therapies. Despite this importance, structural information on eukaryotic AGOs in a fully paired, slicing-competent conformation-hypothesized to be intrinsically unstable-has been lacking. Here we present the cryogenic-electron microscopy structure of a human AGO-guide complex bound to a fully paired target, revealing structural rearrangements that enable this conformation. Critically, the N domain of AGO rotates to allow the RNA full access to the central channel and forms contacts that license rapid slicing. Moreover, a conserved loop in the PIWI domain secures the RNA near the active site to enhance slicing rate and specificity. These results explain how AGO accommodates targets possessing the pairing specificity typically observed in biological and clinical slicing substrates. | |||||||||||||||||||||||||||||||||||||||||||||
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 | ![]() | 183.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 130.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.1 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.1 MB | 表示 | |
XML形式データ | ![]() | 37.3 KB | 表示 | |
CIF形式データ | ![]() | 56.4 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 45752MC 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: RNA鎖 | 分子量: 7078.188 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() |
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#2: RNA鎖 | 分子量: 8813.276 Da / 分子数: 1 / 由来タイプ: 合成 / 由来: (合成) ![]() |
#3: タンパク質 | 分子量: 97319.102 Da / 分子数: 1 / Mutation: D669A / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 参照: UniProt: Q9UKV8, 加水分解酵素; エステル加水分解酵素; 5'-リン酸モノエステル産生エンドリボヌクレアーゼ |
#4: 化合物 | ChemComp-MG / |
研究の焦点であるリガンドがあるか | Y |
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 |
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試料調製
構成要素 | 名称: miR7-HsAGO2 RISC / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT | ||||||||||||||||||||
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分子量 | 値: .113 MDa / 実験値: NO | ||||||||||||||||||||
由来(天然) | 生物種: ![]() | ||||||||||||||||||||
由来(組換発現) | 生物種: ![]() | ||||||||||||||||||||
緩衝液 | pH: 7.5 | ||||||||||||||||||||
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 | ||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R2/2 | ||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 1400 nm / 最小 デフォーカス(公称値): 200 nm / Cs: 2.7 mm / 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: 51 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / エネルギーフィルタースリット幅: 20 eV |
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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: 1427326 | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 69008 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: REAL | ||||||||||||||||||||||||
精密化 | 最高解像度: 3.3 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||
拘束条件 |
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