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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: 8yii | |||||||||||||||||||||
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タイトル | DmDcr-2/LoqsPD/slm2 in dicing state | |||||||||||||||||||||
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![]() | STRUCTURAL PROTEIN/RNA / RNAi / Dcr-2 / Loqs-PD / esiRNA / Cryo-EM / STRUCTURAL PROTEIN-RNA complex | |||||||||||||||||||||
機能・相同性 | ![]() positive regulation of Toll signaling pathway / lncRNA catabolic process / MicroRNA (miRNA) biogenesis / RNAi-mediated antiviral immune response / Small interfering RNA (siRNA) biogenesis / female germ-line stem cell asymmetric division / PKR-mediated signaling / regulation of regulatory ncRNA processing / dosage compensation by hyperactivation of X chromosome / RISC complex binding ...positive regulation of Toll signaling pathway / lncRNA catabolic process / MicroRNA (miRNA) biogenesis / RNAi-mediated antiviral immune response / Small interfering RNA (siRNA) biogenesis / female germ-line stem cell asymmetric division / PKR-mediated signaling / regulation of regulatory ncRNA processing / dosage compensation by hyperactivation of X chromosome / RISC complex binding / global gene silencing by mRNA cleavage / apoptotic DNA fragmentation / germ-line stem cell population maintenance / ribonuclease III / deoxyribonuclease I activity / miRNA metabolic process / RISC-loading complex / detection of virus / regulatory ncRNA-mediated post-transcriptional gene silencing / RISC complex assembly / ribonuclease III activity / pre-miRNA processing / siRNA processing / siRNA binding / ATP-dependent activity, acting on RNA / RISC complex / positive regulation of innate immune response / positive regulation of defense response to virus by host / central nervous system development / mRNA 3'-UTR binding / helicase activity / locomotory behavior / cellular response to virus / cytoplasmic ribonucleoprotein granule / heterochromatin formation / double-stranded RNA binding / defense response to virus / perinuclear region of cytoplasm / ATP hydrolysis activity / RNA binding / ATP binding / nucleus / 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: 3.42 Å | |||||||||||||||||||||
![]() | Cao, N. / Su, S. / Wang, J. / Ma, J. / Wang, H.-W. | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis of endo-siRNA processing by Drosophila Dicer-2 and Loqs-PD. 著者: Na Cao / Jia Wang / Ting Deng / Boming Fan / Shichen Su / Jinbiao Ma / Hong-Wei Wang / ![]() 要旨: Endogenous small interfering RNAs (endo-siRNAs or esiRNAs) originate from either elongated endogenous transcripts capable of forming complex fold-back structures or from double-stranded regions ...Endogenous small interfering RNAs (endo-siRNAs or esiRNAs) originate from either elongated endogenous transcripts capable of forming complex fold-back structures or from double-stranded regions generated through intermolecular base pairing of convergently transcribed mRNAs. The mechanism of maturation and functionality of esiRNAs exhibit significant variation across diverse species. In Drosophila melanogaster, esiRNAs reside in both somatic and germline cells, where they serve as post-transcriptional modulators for specific target RNAs. Their maturation process critically relies on Dicer-2 (Dcr-2), with the assistance of its cofactor Loqs-PD. In this study, we have successfully elucidated the cryo-EM structures of Dcr-2/Loqs-PD complex bound to esiRNA precursors (pre-esiRNAs) in various states. Our structural and biochemical results reveal that ATP is essential for the cleavage of esiRNAs by the Dcr-2/Loqs-PD complex, a process analogous to the cleavage of double-stranded RNA (dsRNA). When Loqs-PD is present, pre-esiRNAs are preferentially loaded onto the Helicase domain of Dcr-2. Moreover, as the Helicase domain exhibits a preference for binding to the rigid end of double-stranded RNA, Dcr-2 tends to cleave pre-esiRNA from the small closed loop end, rather than the loose and flexible open end. | |||||||||||||||||||||
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 | ![]() | 397.3 KB | 表示 | ![]() |
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PDB形式 | ![]() | 303 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 | ![]() 39320MC ![]() 8yigC ![]() 8yihC 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: 197875.484 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: Dcr-2, cg6493, Dcr, dcr, DCR-2, dcr-2, Dcr-2-RA, DCR2, Dcr2, dcr2, dDcr2, dic2, DICER, Dicer, dicer, DICER-2, dicer-2, Dicer2, dicer2, dmDcr-2, Dmel\CG6493, CG6493, Dmel_CG6493 発現宿主: ![]() ![]() 参照: UniProt: A1ZAW0, deoxyribonuclease I, 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, ribonuclease III, EC: 3.6.1.3 | ||||
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#2: タンパク質 | 分子量: 38502.574 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: loqs, dRax, loq, r3d1, TRBP, CG6866 発現宿主: ![]() ![]() 参照: UniProt: Q9VJY9 | ||||
#3: RNA鎖 | 分子量: 33391.727 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() | ||||
#4: 化合物 | ChemComp-ADP / | ||||
#5: 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: DmDcr-2/LoqsPD/slm2 in initial binding state / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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分子量 | 値: 0.2 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: 8 |
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 | 凍結剤: ETHANE / 湿度: 100 % |
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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: FEI TITAN 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): 1500 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 0.01 mm / C2レンズ絞り径: 50 µm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOCONTINUUM (6k x 4k) |
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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 | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.42 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 224757 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT | ||||||||||||||||||||||||
拘束条件 |
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