- EMDB-36489: Cryo-EM structure of PfAgo-guide DNA-target DNA complex -
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基本情報
登録情報
データベース: EMDB / ID: EMD-36489
タイトル
Cryo-EM structure of PfAgo-guide DNA-target DNA complex
マップデータ
試料
複合体: Cryo-EM structure of a PfAgo-guide DNA-target DNA complex
タンパク質・ペプチド: Protein argonaute
DNA: Guide DNA
DNA: Target DNA
DNA: Excess DNA
リガンド: MAGNESIUM ION
キーワード
nuclease / GENE REGULATION
機能・相同性
機能・相同性情報
Hydrolases; Acting on ester bonds; Site specific endodeoxyribonucleases: cleavage is not sequence specific (deleted sub-subclass) / clearance of foreign intracellular DNA / DNA endonuclease activity / manganese ion binding / DNA binding / RNA binding 類似検索 - 分子機能
ジャーナル: Mol Cell / 年: 2024 タイトル: Molecular mechanism for target recognition, dimerization, and activation of Pyrococcus furiosus Argonaute. 著者: Longyu Wang / Wanping Chen / Chendi Zhang / Xiaochen Xie / Fuyong Huang / Miaomiao Chen / Wuxiang Mao / Na Yu / Qiang Wei / Lixin Ma / Zhuang Li / 要旨: The Argonaute nuclease from the thermophilic archaeon Pyrococcus furiosus (PfAgo) contributes to host defense and represents a promising biotechnology tool. Here, we report the structure of a PfAgo- ...The Argonaute nuclease from the thermophilic archaeon Pyrococcus furiosus (PfAgo) contributes to host defense and represents a promising biotechnology tool. Here, we report the structure of a PfAgo-guide DNA-target DNA ternary complex at the cleavage-compatible state. The ternary complex is predominantly dimerized, and the dimerization is solely mediated by PfAgo at PIWI-MID, PIWI-PIWI, and PAZ-N interfaces. Additionally, PfAgo accommodates a short 14-bp guide-target DNA duplex with a wedge-type N domain and specifically recognizes 5'-phosphorylated guide DNA. In contrast, the PfAgo-guide DNA binary complex is monomeric, and the engagement of target DNA with 14-bp complementarity induces sufficient dimerization and activation of PfAgo, accompanied by movement of PAZ and N domains. A closely related Argonaute from Thermococcus thioreducens adopts a similar dimerization configuration with an additional zinc finger formed at the dimerization interface. Dimerization of both Argonautes stabilizes the catalytic loops, highlighting the important role of Argonaute dimerization in the activation and target cleavage.
名称: Protein argonaute / タイプ: protein_or_peptide / ID: 1 / コピー数: 2 / 光学異性体: LEVO EC番号: Hydrolases; Acting on ester bonds; Site specific endodeoxyribonucleases: cleavage is not sequence specific (deleted sub-subclass)