+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-21644 | ||||||||||||
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タイトル | Subunit joining exposes nascent pre-40S rRNA for processing and quality control | ||||||||||||
マップデータ | |||||||||||||
試料 |
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キーワード | 80S-like / Tsr1 / Structural heterogeneity / RIBOSOME | ||||||||||||
機能・相同性 | 機能・相同性情報 endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / RMTs methylate histone arginines / positive regulation of translational fidelity / Protein methylation / mTORC1-mediated signalling / Protein hydroxylation / ribosome-associated ubiquitin-dependent protein catabolic process ...endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / RMTs methylate histone arginines / positive regulation of translational fidelity / Protein methylation / mTORC1-mediated signalling / Protein hydroxylation / ribosome-associated ubiquitin-dependent protein catabolic process / U3 snoRNA binding / GDP-dissociation inhibitor activity / nonfunctional rRNA decay / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / preribosome, small subunit precursor / Ribosomal scanning and start codon recognition / Major pathway of rRNA processing in the nucleolus and cytosol / mRNA destabilization / 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 / regulation of amino acid metabolic process / L13a-mediated translational silencing of Ceruloplasmin expression / 90S preribosome / G-protein alpha-subunit binding / positive regulation of protein kinase activity / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / regulation of translational fidelity / ribonucleoprotein complex binding / ribosomal subunit export from nucleus / ribosomal small subunit export from nucleus / translation regulator activity / 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) / DNA-(apurinic or apyrimidinic site) endonuclease activity / cellular response to amino acid starvation / rescue of stalled ribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / translational initiation / protein kinase C binding / maintenance of translational fidelity / modification-dependent protein catabolic process / cytoplasmic stress granule / protein tag activity / rRNA processing / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / ribosome biogenesis / ribosome binding / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / cytoplasmic translation / negative regulation of translation / rRNA binding / ribosome / protein ubiquitination / structural constituent of ribosome / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / translation / negative regulation of gene expression / GTPase activity / mRNA binding / ubiquitin protein ligase binding / GTP binding / nucleolus / mitochondrion / RNA binding / zinc ion binding / nucleoplasm / nucleus / metal ion binding / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||||||||
生物種 | Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (パン酵母) / Saccharomyces cerevisiae S288C (パン酵母) | ||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.7 Å | ||||||||||||
データ登録者 | Rai J / Parker MD | ||||||||||||
資金援助 | 米国, 3件
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引用 | ジャーナル: RNA / 年: 2021 タイトル: An open interface in the pre-80S ribosome coordinated by ribosome assembly factors Tsr1 and Dim1 enables temporal regulation of Fap7. 著者: Jay Rai / Melissa D Parker / Haina Huang / Stefan Choy / Homa Ghalei / Matthew C Johnson / Katrin Karbstein / M Elizabeth Stroupe / 要旨: During their maturation, nascent 40S subunits enter a translation-like quality control cycle, where they are joined by mature 60S subunits to form 80S-like ribosomes. While these assembly ...During their maturation, nascent 40S subunits enter a translation-like quality control cycle, where they are joined by mature 60S subunits to form 80S-like ribosomes. While these assembly intermediates are essential for maturation and quality control, how they form, and how their structure promotes quality control, remains unknown. To address these questions, we determined the structure of an 80S-like ribosome assembly intermediate to an overall resolution of 3.4 Å. The structure, validated by biochemical data, resolves a large body of previously paradoxical data and illustrates how assembly and translation factors cooperate to promote the formation of an interface that lacks many mature subunit contacts but is stabilized by the universally conserved methyltransferase Dim1. We also show how Tsr1 enables this interface by blocking the canonical binding of eIF5B to 40S subunits, while maintaining its binding to 60S. The structure also shows how this interface leads to unfolding of the platform, which allows for temporal regulation of the ATPase Fap7, thus linking 40S maturation to quality control during ribosome assembly. | ||||||||||||
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 | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_21644.map.gz | 120.3 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-21644-v30.xml emd-21644.xml | 52.3 KB 52.3 KB | 表示 表示 | EMDBヘッダ |
画像 | emd_21644.png | 172.7 KB | ||
Filedesc metadata | emd-21644.cif.gz | 11.2 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-21644 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-21644 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_21644_validation.pdf.gz | 435.4 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_21644_full_validation.pdf.gz | 434.9 KB | 表示 | |
XML形式データ | emd_21644_validation.xml.gz | 6.9 KB | 表示 | |
CIF形式データ | emd_21644_validation.cif.gz | 8 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-21644 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-21644 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_21644.map.gz / 形式: CCP4 / 大きさ: 216 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.24 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
+全体 : 80S-like ribosome
+超分子 #1: 80S-like ribosome
+分子 #1: 40S ribosomal protein S0-A
+分子 #2: 40S ribosomal protein S2
+分子 #3: 40S ribosomal protein S3
+分子 #4: 40S ribosomal protein S4-A
+分子 #5: 40S ribosomal protein S5
+分子 #6: 40S ribosomal protein S6-A
+分子 #7: 40S ribosomal protein S7-A
+分子 #8: 40S ribosomal protein S8-A
+分子 #9: 40S ribosomal protein S9-A
+分子 #10: 40S ribosomal protein S10-A
+分子 #11: 40S ribosomal protein S11-A
+分子 #12: 40S ribosomal protein S12
+分子 #13: 40S ribosomal protein S13
+分子 #14: 40S ribosomal protein S15
+分子 #15: 40S ribosomal protein S16-A
+分子 #16: 40S ribosomal protein S17-A
+分子 #17: 40S ribosomal protein S18-A
+分子 #18: 40S ribosomal protein S19-A
+分子 #19: 40S ribosomal protein S20
+分子 #20: 40S ribosomal protein S21-A
+分子 #21: 40S ribosomal protein S22-A
+分子 #22: 40S ribosomal protein S23-A
+分子 #23: 40S ribosomal protein S24-A
+分子 #24: 40S ribosomal protein S25-A
+分子 #25: 40S ribosomal protein S27-A
+分子 #26: 40S ribosomal protein S28-A
+分子 #27: 40S ribosomal protein S29-A
+分子 #28: 40S ribosomal protein S30-A
+分子 #29: Ubiquitin-40S ribosomal protein S31
+分子 #30: Guanine nucleotide-binding protein subunit beta-like protein
+分子 #31: Ribosome biogenesis protein TSR1
+分子 #32: 20S ribosomal RNA
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
緩衝液 | pH: 6.8 |
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グリッド | 詳細: unspecified |
凍結 | 凍結剤: ETHANE |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: DIRECT ELECTRON DE-64 (8k x 8k) 平均電子線量: 25.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
+画像解析 #1
+画像解析 #2
-原子モデル構築 1
精密化 | 空間: REAL |
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得られたモデル | PDB-6wdr: |