+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6lqp | ||||||||||||||||||
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タイトル | Cryo-EM structure of 90S small subunit preribosomes in transition states (State A) | ||||||||||||||||||
要素 |
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キーワード | RIBOSOME / ribosome assembly / 90S to pre-40S transition / cryo-EM / Dhr1 | ||||||||||||||||||
機能・相同性 | 機能・相同性情報 rRNA cytidine N-acetyltransferase activity / Noc4p-Nop14p complex / rRNA acetylation involved in maturation of SSU-rRNA / tRNA N-acetyltransferase activity / regulation of ribosomal protein gene transcription by RNA polymerase II / t-UTP complex / rRNA small subunit pseudouridine methyltransferase Nep1 / tRNA acetylation / RNA fragment catabolic process / CURI complex ...rRNA cytidine N-acetyltransferase activity / Noc4p-Nop14p complex / rRNA acetylation involved in maturation of SSU-rRNA / tRNA N-acetyltransferase activity / regulation of ribosomal protein gene transcription by RNA polymerase II / t-UTP complex / rRNA small subunit pseudouridine methyltransferase Nep1 / tRNA acetylation / RNA fragment catabolic process / CURI complex / UTP-C complex / rRNA 2'-O-methylation / Pwp2p-containing subcomplex of 90S preribosome / histone H2AQ104 methyltransferase activity / nuclear microtubule / Mpp10 complex / snoRNA guided rRNA 2'-O-methylation / rRNA (pseudouridine) methyltransferase activity / rRNA modification / regulation of rRNA processing / endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / septum digestion after cytokinesis / tRNA re-export from nucleus / snRNA binding / box C/D sno(s)RNA 3'-end processing / regulation of transcription by RNA polymerase I / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / rRNA methyltransferase activity / rDNA heterochromatin / positive regulation of rRNA processing / single-stranded telomeric DNA binding / box C/D methylation guide snoRNP complex / tRNA export from nucleus / U4/U6 snRNP / rRNA base methylation / Negative regulators of DDX58/IFIH1 signaling / rRNA primary transcript binding / SUMOylation of RNA binding proteins / sno(s)RNA-containing ribonucleoprotein complex / small nuclear ribonucleoprotein complex / protein localization to nucleolus / U4 snRNA binding / mTORC1-mediated signalling / O-methyltransferase activity / Protein hydroxylation / rRNA methylation / U3 snoRNA binding / mRNA modification / U4 snRNP / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / poly(A)+ mRNA export from nucleus / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / preribosome, small subunit precursor / Ribosomal scanning and start codon recognition / snoRNA binding / precatalytic spliceosome / establishment of cell polarity / positive regulation of transcription by RNA polymerase I / Major pathway of rRNA processing in the nucleolus and cytosol / nucleolar large rRNA transcription by RNA polymerase I / spliceosomal complex assembly / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Formation of a pool of free 40S subunits / L13a-mediated translational silencing of Ceruloplasmin expression / 90S preribosome / regulation of translational fidelity / Ub-specific processing proteases / ribosomal subunit export from nucleus / RNA processing / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / vesicle-mediated transport / U4/U6 x U5 tri-snRNP complex / enzyme activator activity / 転移酵素; アシル基を移すもの; アミノアシル基以外のアシル基を移すもの / RNA endonuclease activity / nuclear periphery / 転移酵素; 一炭素原子の基を移すもの; メチル基を移すもの / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / translational initiation / spliceosomal complex / maintenance of translational fidelity / mRNA splicing, via spliceosome / rRNA processing / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / protein transport / peroxisome / ribosome biogenesis / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / cytoplasmic translation / tRNA binding 類似検索 - 分子機能 | ||||||||||||||||||
生物種 | Saccharomyces cerevisiae S288C (パン酵母) Saccharomyces cerevisiae (パン酵母) | ||||||||||||||||||
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: 3.2 Å | ||||||||||||||||||
データ登録者 | Du, Y. / Ye, K. | ||||||||||||||||||
資金援助 | 中国, 5件
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引用 | ジャーナル: Science / 年: 2020 タイトル: Cryo-EM structure of 90 small ribosomal subunit precursors in transition states. 著者: Yifei Du / Weidong An / Xing Zhu / Qi Sun / Jia Qi / Keqiong Ye / 要旨: The 90 preribosome is a large, early assembly intermediate of small ribosomal subunits that undergoes structural changes to give a pre-40 ribosome. Here, we gained insight into this transition by ...The 90 preribosome is a large, early assembly intermediate of small ribosomal subunits that undergoes structural changes to give a pre-40 ribosome. Here, we gained insight into this transition by determining cryo-electron microscopy structures of intermediates in the path from the 90 to the pre-40 The full transition is blocked by deletion of RNA helicase Dhr1. A series of structural snapshots revealed that the excised 5' external transcribed spacer (5' ETS) is degraded within 90, driving stepwise disassembly of assembly factors and ribosome maturation. The nuclear exosome, an RNA degradation machine, docks on the 90 through helicase Mtr4 and is primed to digest the 3' end of the 5' ETS. The structures resolved between 3.2- and 8.6-angstrom resolution reveal key intermediates and the critical role of 5' ETS degradation in 90 progression. | ||||||||||||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6lqp.cif.gz | 5.3 MB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6lqp.ent.gz | 表示 | PDB形式 | |
PDBx/mmJSON形式 | 6lqp.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
文書・要旨 | 6lqp_validation.pdf.gz | 1.6 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6lqp_full_validation.pdf.gz | 1.7 MB | 表示 | |
XML形式データ | 6lqp_validation.xml.gz | 563.8 KB | 表示 | |
CIF形式データ | 6lqp_validation.cif.gz | 964.4 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/lq/6lqp ftp://data.pdbj.org/pub/pdb/validation_reports/lq/6lqp | HTTPS FTP |
-関連構造データ
関連構造データ | 0949MC 0950C 0951C 0952C 0953C 0954C 0955C 6lqqC 6lqrC 6lqsC 6lqtC 6lquC 6lqvC 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 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
+RNA鎖 , 3種, 3分子 3A5ASA
+40S ribosomal protein ... , 18種, 18分子 SCSFSGSHSISJSKSMSNSOSPSRSTSXSYSZScSd
+タンパク質 , 17種, 21分子 3B3C3G3HAGB15B5H5IRCRGRHRKRLRMRSRTRVRWRYX1
+Nucleolar protein ... , 2種, 2分子 3D3E
+Ribosomal RNA-processing protein ... , 2種, 2分子 3FRF
+U3 small nucleolar RNA-associated protein ... , 17種, 17分子 A4A5A8A9AEAFB2B3B8BEB65C5D5ERERPRQ
+U3 small nucleolar ribonucleoprotein protein ... , 3種, 3分子 5F5GRB
+RRNA-processing protein ... , 2種, 2分子 5J5K
+Ribosome biogenesis protein ... , 3種, 3分子 RARIRJ
+Nucleolar complex protein ... , 2種, 2分子 RNRO
+非ポリマー , 3種, 4分子
+詳細
-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: 90S pre-ribosome (Dhr1-depleted, state A) / タイプ: COMPLEX / Entity ID: #1-#69 / 由来: NATURAL | |||||||||||||||
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分子量 | 値: 5 MDa / 実験値: NO | |||||||||||||||
由来(天然) | 生物種: Saccharomyces cerevisiae S288C (パン酵母) | |||||||||||||||
緩衝液 | pH: 7.4 | |||||||||||||||
緩衝液成分 |
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試料 | 濃度: 2 mg/ml / 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 R1.2/1.3 | |||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
-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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1500 nm / Cs: 2.7 mm |
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: 50 e/Å2 / 検出モード: SUPER-RESOLUTION 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: 10 / 実像数: 18028 |
画像スキャン | 動画フレーム数/画像: 32 / 利用したフレーム数/画像: 1-32 |
-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: 382298 | ||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 71230 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 6KE6 Accession code: 6KE6 / Source name: PDB / タイプ: experimental model |