+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7a1g | |||||||||
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タイトル | Structure of a crosslinked yeast ABCE1-bound 43S pre-initiation complex | |||||||||
要素 |
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キーワード | RIBOSOME / Translation / Initiation / Ribosome Recycling / ABC Proteins | |||||||||
機能・相同性 | 機能・相同性情報 eukaryotic translation initiation factor 3 complex / formation of cytoplasmic translation initiation complex / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / eukaryotic 43S preinitiation complex / ribosome disassembly / eukaryotic 48S preinitiation complex / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / Negative regulators of DDX58/IFIH1 signaling / positive regulation of translational fidelity ...eukaryotic translation initiation factor 3 complex / formation of cytoplasmic translation initiation complex / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / eukaryotic 43S preinitiation complex / ribosome disassembly / eukaryotic 48S preinitiation complex / negative regulation of glucose mediated signaling pathway / negative regulation of translational frameshifting / Negative regulators of DDX58/IFIH1 signaling / positive regulation of translational fidelity / RMTs methylate histone arginines / Protein methylation / mTORC1-mediated signalling / Protein hydroxylation / ribosome-associated ubiquitin-dependent protein catabolic process / GDP-dissociation inhibitor activity / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / nonfunctional rRNA decay / preribosome, small subunit precursor / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / 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 / ribosomal small subunit binding / 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 / Ub-specific processing proteases / ribosomal subunit export from nucleus / ribosomal small subunit export from nucleus / translation regulator activity / translational termination / 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 / translation initiation factor activity / cellular response to amino acid starvation / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosome assembly / rescue of stalled ribosome / ribosomal large subunit biogenesis / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / positive regulation of translation / 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 / structural constituent of ribosome / protein ubiquitination / iron ion binding / translation / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / negative regulation of gene expression / mRNA binding / ubiquitin protein ligase binding / nucleolus / ATP hydrolysis activity / mitochondrion / RNA binding / zinc ion binding / nucleoplasm / ATP binding / nucleus / metal ion binding / cytosol / cytoplasm 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 Å | |||||||||
データ登録者 | Mackens-Kiani, T. / Kratzat, H. / Cheng, J. / Berninghausen, O. / Becker, T. / Beckmann, R. | |||||||||
資金援助 | ドイツ, フランス, 2件
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引用 | ジャーナル: EMBO J / 年: 2021 タイトル: A structural inventory of native ribosomal ABCE1-43S pre-initiation complexes. 著者: Hanna Kratzat / Timur Mackens-Kiani / Michael Ameismeier / Mia Potocnjak / Jingdong Cheng / Estelle Dacheux / Abdelkader Namane / Otto Berninghausen / Franz Herzog / Micheline Fromont-Racine ...著者: Hanna Kratzat / Timur Mackens-Kiani / Michael Ameismeier / Mia Potocnjak / Jingdong Cheng / Estelle Dacheux / Abdelkader Namane / Otto Berninghausen / Franz Herzog / Micheline Fromont-Racine / Thomas Becker / Roland Beckmann / 要旨: In eukaryotic translation, termination and ribosome recycling phases are linked to subsequent initiation of a new round of translation by persistence of several factors at ribosomal sub-complexes. ...In eukaryotic translation, termination and ribosome recycling phases are linked to subsequent initiation of a new round of translation by persistence of several factors at ribosomal sub-complexes. These comprise/include the large eIF3 complex, eIF3j (Hcr1 in yeast) and the ATP-binding cassette protein ABCE1 (Rli1 in yeast). The ATPase is mainly active as a recycling factor, but it can remain bound to the dissociated 40S subunit until formation of the next 43S pre-initiation complexes. However, its functional role and native architectural context remains largely enigmatic. Here, we present an architectural inventory of native yeast and human ABCE1-containing pre-initiation complexes by cryo-EM. We found that ABCE1 was mostly associated with early 43S, but also with later 48S phases of initiation. It adopted a novel hybrid conformation of its nucleotide-binding domains, while interacting with the N-terminus of eIF3j. Further, eIF3j occupied the mRNA entry channel via its ultimate C-terminus providing a structural explanation for its antagonistic role with respect to mRNA binding. Overall, the native human samples provide a near-complete molecular picture of the architecture and sophisticated interaction network of the 43S-bound eIF3 complex and the eIF2 ternary complex containing the initiator tRNA. | |||||||||
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 | 7a1g.cif.gz | 1.8 MB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7a1g.ent.gz | 1.4 MB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7a1g.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 | 7a1g_validation.pdf.gz | 1.9 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7a1g_full_validation.pdf.gz | 2 MB | 表示 | |
XML形式データ | 7a1g_validation.xml.gz | 172.5 KB | 表示 | |
CIF形式データ | 7a1g_validation.cif.gz | 291.8 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/a1/7a1g ftp://data.pdbj.org/pub/pdb/validation_reports/a1/7a1g | HTTPS FTP |
-関連構造データ
-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 , 1種, 1分子 2
#1: RNA鎖 | 分子量: 570585.250 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Saccharomyces cerevisiae S288C (パン酵母) |
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+40S ribosomal protein ... , 31種, 31分子 PQRSTUVWXYZabcdefgEABCDFHIJKLMh
-タンパク質 , 4種, 5分子 NOzyx
#32: タンパク質 | 分子量: 8388.049 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (パン酵母) 株: ATCC 204508 / S288c / 参照: UniProt: P05759 | ||
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#33: タンパク質 | 分子量: 34151.484 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (パン酵母) 株: ATCC 204508 / S288c / 参照: UniProt: P38011 | ||
#35: タンパク質 | 分子量: 29611.225 Da / 分子数: 2 / 由来タイプ: 天然 由来: (天然) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (パン酵母) 株: ATCC 204508 / S288c / 参照: UniProt: Q05775 #36: タンパク質 | | 分子量: 67714.469 Da / 分子数: 1 / 由来タイプ: 天然 由来: (天然) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (パン酵母) 株: ATCC 204508 / S288c / 参照: UniProt: Q03195 |
-非ポリマー , 4種, 85分子
#37: 化合物 | ChemComp-MG / #38: 化合物 | #39: 化合物 | #40: 化合物 | ChemComp-ADP / | |
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-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 |
-試料調製
構成要素 | 名称: ABCE1-bound 43S PIC / タイプ: RIBOSOME / Entity ID: #1-#36 / 由来: NATURAL |
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由来(天然) | 生物種: Saccharomyces cerevisiae S288C (パン酵母) |
緩衝液 | pH: 7.4 |
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 |
-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: 44.8 e/Å2 フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
-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: 25245 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 13.27 Å2 | ||||||||||||||||||||||||
拘束条件 |
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