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基本情報
登録情報 | データベース: EMDB / ID: EMD-4348 | |||||||||||||||
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タイトル | Cryo-EM structure of a late human pre-40S ribosomal subunit - State B | |||||||||||||||
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![]() | 40S / pre-40S / ribosome biogenesis / RIBOSOME | |||||||||||||||
機能・相同性 | ![]() regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / translation at postsynapse / negative regulation of RNA splicing / mammalian oogenesis stage / activation-induced cell death of T cells / neural crest cell differentiation ...regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / translation at postsynapse / negative regulation of RNA splicing / mammalian oogenesis stage / activation-induced cell death of T cells / neural crest cell differentiation / U3 snoRNA binding / translation at presynapse / positive regulation of ubiquitin-protein transferase activity / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / rRNA modification in the nucleus and cytosol / cytoplasmic side of rough endoplasmic reticulum membrane / laminin receptor activity / snoRNA binding / preribosome, small subunit precursor / negative regulation of ubiquitin protein ligase activity / Ribosomal scanning and start codon recognition / Translation initiation complex formation / fibroblast growth factor binding / monocyte chemotaxis / Protein hydroxylation / TOR signaling / SARS-CoV-1 modulates host translation machinery / mTORC1-mediated signalling / T cell proliferation involved in immune response / Peptide chain elongation / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Selenocysteine synthesis / positive regulation of signal transduction by p53 class mediator / Formation of a pool of free 40S subunits / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ubiquitin ligase inhibitor activity / Eukaryotic Translation Termination / Response of EIF2AK4 (GCN2) to amino acid deficiency / SRP-dependent cotranslational protein targeting to membrane / negative regulation of ubiquitin-dependent protein catabolic process / Viral mRNA Translation / negative regulation of respiratory burst involved in inflammatory response / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / erythrocyte development / Major pathway of rRNA processing in the nucleolus and cytosol / regulation of translational fidelity / 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) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / Protein methylation / Nuclear events stimulated by ALK signaling in cancer / ribosomal small subunit export from nucleus / rough endoplasmic reticulum / laminin binding / translation regulator activity / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / positive regulation of cell cycle / translation initiation factor binding / gastrulation / MDM2/MDM4 family protein binding / cytosolic ribosome / Mitotic Prometaphase / antiviral innate immune response / EML4 and NUDC in mitotic spindle formation / stress granule assembly / RNA endonuclease activity / visual perception / Resolution of Sister Chromatid Cohesion / innate immune response in mucosa / cellular response to leukemia inhibitory factor / erythrocyte differentiation / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / positive regulation of translation / stem cell proliferation / mRNA 3'-UTR binding / maturation of SSU-rRNA / neural tube closure / translational initiation / small-subunit processome / placenta development / RHO GTPases Activate Formins / maintenance of translational fidelity / response to virus / modification-dependent protein catabolic process / mRNA 5'-UTR binding / RMTs methylate histone arginines / G1/S transition of mitotic cell cycle / Regulation of expression of SLITs and ROBOs / cytoplasmic ribonucleoprotein granule / protein tag activity / antimicrobial humoral immune response mediated by antimicrobial peptide / rRNA processing / osteoblast differentiation / Separation of Sister Chromatids / antibacterial humoral response / apical part of cell / glucose homeostasis / ribosome biogenesis 類似検索 - 分子機能 | |||||||||||||||
生物種 | ![]() | |||||||||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 4.0 Å | |||||||||||||||
![]() | Ameismeier M / Cheng J | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Visualizing late states of human 40S ribosomal subunit maturation. 著者: Michael Ameismeier / Jingdong Cheng / Otto Berninghausen / Roland Beckmann / ![]() 要旨: The formation of eukaryotic ribosomal subunits extends from the nucleolus to the cytoplasm and entails hundreds of assembly factors. Despite differences in the pathways of ribosome formation, high- ...The formation of eukaryotic ribosomal subunits extends from the nucleolus to the cytoplasm and entails hundreds of assembly factors. Despite differences in the pathways of ribosome formation, high-resolution structural information has been available only from fungi. Here we present cryo-electron microscopy structures of late-stage human 40S assembly intermediates, representing one state reconstituted in vitro and five native states that range from nuclear to late cytoplasmic. The earliest particles reveal the position of the biogenesis factor RRP12 and distinct immature rRNA conformations that accompany the formation of the 40S subunit head. Molecular models of the late-acting assembly factors TSR1, RIOK1, RIOK2, ENP1, LTV1, PNO1 and NOB1 provide mechanistic details that underlie their contribution to a sequential 40S subunit assembly. The NOB1 architecture displays an inactive nuclease conformation that requires rearrangement of the PNO1-bound 3' rRNA, thereby coordinating the final rRNA folding steps with site 3 cleavage. | |||||||||||||||
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 | EMマップ: ![]() ![]() ![]() |
添付画像 |
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ダウンロードとリンク
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マップデータ | ![]() | 17.4 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 47.8 KB 47.8 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 12.9 KB | 表示 | ![]() |
画像 | ![]() | 159.9 KB | ||
Filedesc metadata | ![]() | 11 KB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 6g4sMC ![]() 4337C ![]() 4349C ![]() 4350C ![]() 4351C ![]() 4352C ![]() 4353C ![]() 6g18C ![]() 6g4wC ![]() 6g51C ![]() 6g53C ![]() 6g5hC ![]() 6g5iC M: このマップから作成された原子モデル C: 同じ文献を引用 ( |
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類似構造データ |
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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: 1.084 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
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試料の構成要素
+全体 : Cryo-EM structure of a late human pre-40S ribosomal subunit - State B
+超分子 #1: Cryo-EM structure of a late human pre-40S ribosomal subunit - State B
+分子 #1: pre-18S ribosomal RNA
+分子 #2: 40S ribosomal protein S17
+分子 #3: 40S ribosomal protein SA
+分子 #4: 40S ribosomal protein S27
+分子 #5: 40S ribosomal protein S3a
+分子 #6: 40S ribosomal protein S2
+分子 #7: 40S ribosomal protein S28
+分子 #8: 40S ribosomal protein S4, X isoform
+分子 #9: 40S ribosomal protein S30
+分子 #10: 40S ribosomal protein S5
+分子 #11: 40S ribosomal protein S7
+分子 #12: 40S ribosomal protein S6
+分子 #13: 40S ribosomal protein S25
+分子 #14: 40S ribosomal protein S24
+分子 #15: RNA-binding protein NOB1
+分子 #16: RNA-binding protein PNO1
+分子 #17: 40S ribosomal protein S23
+分子 #18: Bystin
+分子 #19: 40S ribosomal protein S15a
+分子 #20: 40S ribosomal protein S21
+分子 #21: Pre-rRNA-processing protein TSR1 homolog
+分子 #22: Protein LTV1 homolog
+分子 #23: 40S ribosomal protein S19
+分子 #24: 40S ribosomal protein S18
+分子 #25: 40S ribosomal protein S16
+分子 #26: 40S ribosomal protein S15
+分子 #27: 40S ribosomal protein S14
+分子 #28: 40S ribosomal protein S13
+分子 #29: 40S ribosomal protein S11
+分子 #30: 40S ribosomal protein S9
+分子 #31: 40S ribosomal protein S8
+分子 #32: RRP12
+分子 #33: Unknown
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7.6 |
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凍結 | 凍結剤: ETHANE |
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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: FEI FALCON II (4k x 4k) 平均電子線量: 2.5 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
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 |