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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: 6zxe | ||||||
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| タイトル | Cryo-EM structure of a late human pre-40S ribosomal subunit - State F2 | ||||||
要素 |
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キーワード | RIBOSOME / Ribosome Biogenesis / Pre-40S | ||||||
| 機能・相同性 | 機能・相同性情報methyltransferase complex / phenylalanyl-tRNA aminoacylation / phenylalanine-tRNA ligase activity / positive regulation of rRNA processing / negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of ubiquitin-protein transferase activity / positive regulation of respiratory burst involved in inflammatory response ...methyltransferase complex / phenylalanyl-tRNA aminoacylation / phenylalanine-tRNA ligase activity / positive regulation of rRNA processing / negative regulation of endoplasmic reticulum unfolded protein response / oxidized pyrimidine DNA binding / response to TNF agonist / positive regulation of base-excision repair / positive regulation of ubiquitin-protein transferase activity / positive regulation of respiratory burst involved in inflammatory response / positive regulation of gastrulation / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage / protein tyrosine kinase inhibitor activity / IRE1-RACK1-PP2A complex / positive regulation of Golgi to plasma membrane protein transport / nucleolus organization / positive regulation of DNA-templated transcription initiation / TNFR1-mediated ceramide production / negative regulation of RNA splicing / neural crest cell differentiation / supercoiled DNA binding / NF-kappaB complex / negative regulation of DNA repair / cytoplasmic translational initiation / oxidized purine DNA binding / cysteine-type endopeptidase activator activity involved in apoptotic process / preribosome, small subunit precursor / negative regulation of intrinsic apoptotic signaling pathway in response to hydrogen peroxide / rRNA modification in the nucleus and cytosol / negative regulation of bicellular tight junction assembly / ubiquitin-like protein conjugating enzyme binding / regulation of establishment of cell polarity / negative regulation of phagocytosis / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / protein kinase A binding / Ribosomal scanning and start codon recognition / ion channel inhibitor activity / laminin receptor activity / Translation initiation complex formation / pigmentation / positive regulation of mitochondrial depolarization / negative regulation of Wnt signaling pathway / fibroblast growth factor binding / monocyte chemotaxis / BH3 domain binding / Protein hydroxylation / negative regulation of translational frameshifting / SARS-CoV-1 modulates host translation machinery / regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / TOR signaling / positive regulation of GTPase activity / iron-sulfur cluster binding / mTORC1-mediated signalling / Peptide chain elongation / regulation of cell division / Selenocysteine synthesis / Formation of a pool of free 40S subunits / cellular response to ethanol / Eukaryotic Translation Termination / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / negative regulation of protein binding / protein serine/threonine kinase inhibitor activity / Viral mRNA Translation / ubiquitin ligase inhibitor activity / negative regulation of respiratory burst involved in inflammatory response / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / positive regulation of signal transduction by p53 class mediator / GTP hydrolysis and joining of the 60S ribosomal subunit / negative regulation of ubiquitin-dependent protein catabolic process / L13a-mediated translational silencing of Ceruloplasmin expression / Major pathway of rRNA processing in the nucleolus and cytosol / 加水分解酵素; 酸無水物に作用; リン含有酸無水物に作用 / regulation of translational fidelity / positive regulation of microtubule polymerization / phagocytic cup / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / positive regulation of intrinsic apoptotic signaling pathway / spindle assembly / Protein methylation / Nuclear events stimulated by ALK signaling in cancer / 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) / rough endoplasmic reticulum / ribosomal small subunit export from nucleus / positive regulation of cell cycle / laminin binding / RNA endonuclease activity / translation initiation factor binding / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / Maturation of protein E / gastrulation / DNA-(apurinic or apyrimidinic site) endonuclease activity / Maturation of protein E / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora 類似検索 - 分子機能 | ||||||
| 生物種 | Homo sapiens (ヒト) | ||||||
| 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 Å | ||||||
データ登録者 | Ameismeier, M. / Zemp, I. / van den Heuvel, J. / Thoms, M. / Berninghausen, O. / Kutay, U. / Beckmann, R. | ||||||
| 資金援助 | ドイツ, 1件
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引用 | ジャーナル: Nature / 年: 2020タイトル: Structural basis for the final steps of human 40S ribosome maturation. 著者: Michael Ameismeier / Ivo Zemp / Jasmin van den Heuvel / Matthias Thoms / Otto Berninghausen / Ulrike Kutay / Roland Beckmann / ![]() 要旨: Eukaryotic ribosomes consist of a small 40S and a large 60S subunit that are assembled in a highly coordinated manner. More than 200 factors ensure correct modification, processing and folding of ...Eukaryotic ribosomes consist of a small 40S and a large 60S subunit that are assembled in a highly coordinated manner. More than 200 factors ensure correct modification, processing and folding of ribosomal RNA and the timely incorporation of ribosomal proteins. Small subunit maturation ends in the cytosol, when the final rRNA precursor, 18S-E, is cleaved at site 3 by the endonuclease NOB1. Previous structures of human 40S precursors have shown that NOB1 is kept in an inactive state by its partner PNO1. The final maturation events, including the activation of NOB1 for the decisive rRNA-cleavage step and the mechanisms driving the dissociation of the last biogenesis factors have, however, remained unresolved. Here we report five cryo-electron microscopy structures of human 40S subunit precursors, which describe the compositional and conformational progression during the final steps of 40S assembly. Our structures explain the central role of RIOK1 in the displacement and dissociation of PNO1, which in turn allows conformational changes and activation of the endonuclease NOB1. In addition, we observe two factors, eukaryotic translation initiation factor 1A domain-containing protein (EIF1AD) and leucine-rich repeat-containing protein 47 (LRRC47), which bind to late pre-40S particles near RIOK1 and the central rRNA helix 44. Finally, functional data shows that EIF1AD is required for efficient assembly factor recycling and 18S-E processing. Our results thus enable a detailed understanding of the last steps in 40S formation in human cells and, in addition, provide evidence for principal differences in small ribosomal subunit formation between humans and the model organism Saccharomyces cerevisiae. | ||||||
| 履歴 |
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構造の表示
| ムービー |
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| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 6zxe.cif.gz | 1.8 MB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb6zxe.ent.gz | 1.4 MB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 6zxe.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/zx/6zxe ftp://data.pdbj.org/pub/pdb/validation_reports/zx/6zxe | HTTPS FTP |
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-関連構造データ
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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
+40S ribosomal protein ... , 30種, 30分子 RABCEGHIJLNOVWXYbedDFKMPQSTUZc
-RNA-binding protein ... , 2種, 2分子 xy
| #20: タンパク質 | 分子量: 27970.355 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: Q9NRX1 |
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| #21: タンパク質 | 分子量: 46743.914 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト)参照: UniProt: Q9ULX3, 加水分解酵素; エステル加水分解酵素 |
-タンパク質 , 4種, 4分子 fgkz
| #34: タンパク質 | 分子量: 18004.041 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P62979 |
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| #35: タンパク質 | 分子量: 35115.652 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P63244 |
| #36: タンパク質 | 分子量: 63563.941 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: Q8N1G4 |
| #37: タンパク質 | 分子量: 65692.094 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト)参照: UniProt: Q9BRS2, non-specific serine/threonine protein kinase, 加水分解酵素; 酸無水物に作用; 酸無水物に作用・物質の膜輸送を触媒する |
-RNA鎖 / 非ポリマー , 2種, 3分子 2

| #1: RNA鎖 | 分子量: 604102.750 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: GenBank: 151415227 |
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| #38: 化合物 |
-詳細
| 研究の焦点であるリガンドがあるか | N |
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-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: Cryo-EM structure of a late human pre-40S ribosomal subunit - State F2 タイプ: RIBOSOME / 詳細: Map filtered at local resolution / Entity ID: #1-#37 / 由来: NATURAL |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) / 株: HEK293T |
| 緩衝液 | pH: 7.6 |
| 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: 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 |
| 撮影 | 電子線照射量: 48 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (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: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 32535 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)
ドイツ, 1件
引用
UCSF Chimera

















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