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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: 9k6r | ||||||
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タイトル | Cryo-EM Structure of hAGO2D669A-siRNA-target (14-nt, uni-lobed) | ||||||
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![]() | RNA BINDING PROTEIN / Argonaute protein / siRNA / RNA BINDING PROTEIN/RNA | ||||||
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 / positive regulation of translation / post-embryonic development / 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: 2.7 Å | ||||||
![]() | Li, Z.Z. / Xu, Q.K. / Wu, J.P. / Shen, E.Z. | ||||||
資金援助 | 1件
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![]() | ![]() タイトル: Mechanistic insights into RNA cleavage by human Argonaute2-siRNA complex. 著者: Zhenzhen Li / Qikui Xu / Yan Zhang / Jing Zhong / Tianxiang Zhang / Junchao Xue / Shuxian Liu / Haishan Gao / Z Z Zhao Zhang / Jianping Wu / En-Zhi Shen / ![]() ![]() 要旨: In animals, AGO-clade Argonaute proteins utilize small interfering RNAs (siRNAs) as guides to recognize target with complete complementarity, resulting in target RNA cleavage that is a critical step ...In animals, AGO-clade Argonaute proteins utilize small interfering RNAs (siRNAs) as guides to recognize target with complete complementarity, resulting in target RNA cleavage that is a critical step for target silencing. These proteins feature a constricted nucleic acid-binding channel that limits base pairing between the guide and target beyond the seed region. How the AGO-siRNA complexes overcome this structural limitation and achieve efficient target cleavage remains unclear. We performed cryo-electron microscopy of human AGO-siRNA complexes bound to target RNAs of increasing lengths to examine the conformational changes associated with target recognition and cleavage. Initially, conformational transition propagates from the opening of the PAZ domain and extends through a repositioning of the PIWI-L1-N domain toward the binding channel, facilitating the capture of siRNA-target duplex. Subsequent extension of base pairing drives the downward movement of the PIWI-L1-N domain to enable catalytic activation. Finally, further base pairing toward the 3' end of siRNA destabilizes the PAZ-N domain, resulting in a "uni-lobed" architecture, which might facilitate the multi-turnover action of the AGO-siRNA enzyme complex. In contrast to PIWI-clade Argonautes, the "uni-lobed" structure of the AGO complex makes multiple contacts with the target in the central region of the siRNA-target duplex, positioning it within the catalytic site. Our findings shed light on the stepwise mechanisms by which the AGO-siRNA complex executes target RNA cleavage and offer insights into the distinct operational modalities of AGO and PIWI proteins in achieving such cleavage. | ||||||
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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 | ![]() | 130.9 KB | 表示 | ![]() |
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PDB形式 | ![]() | 91.7 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 62133MC ![]() 9k6pC ![]() 9k6qC ![]() 9k6sC ![]() 9k6tC 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: タンパク質 | 分子量: 95492.039 Da / 分子数: 1 / 変異: 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 |
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#2: RNA鎖 | 分子量: 4713.833 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
#3: RNA鎖 | 分子量: 4464.676 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
#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: hAGO2D669A-siRNA-target (14-nt, comma) / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 8 |
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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1500 nm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: TFS FALCON 4i (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: 2.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 115100 / 対称性のタイプ: POINT |