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基本情報
登録情報 | データベース: PDB / ID: 8agx | ||||||
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タイトル | Yeast RQC complex in state with the RING domain of Ltn1 in the IN position | ||||||
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![]() | TRANSLATION / ribosome-associated quality control / NEMF / Listerin / CAT tailing | ||||||
機能・相同性 | ![]() alpha-aminoacyl-tRNA binding / cytoplasmic translational elongation through polyproline stretches / positive regulation of cytoplasmic translational elongation through polyproline stretches / Hypusine synthesis from eIF5A-lysine / CAT tailing / translational frameshifting / cytoplasmic translational elongation / positive regulation of translational termination / RQC complex / peptide biosynthetic process ...alpha-aminoacyl-tRNA binding / cytoplasmic translational elongation through polyproline stretches / positive regulation of cytoplasmic translational elongation through polyproline stretches / Hypusine synthesis from eIF5A-lysine / CAT tailing / translational frameshifting / cytoplasmic translational elongation / positive regulation of translational termination / RQC complex / peptide biosynthetic process / cytoplasmic translational termination / positive regulation of translational elongation / ribosome-associated ubiquitin-dependent protein catabolic process / pre-mRNA 5'-splice site binding / response to cycloheximide / cleavage in ITS2 between 5.8S rRNA and LSU-rRNA of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / ribosomal large subunit binding / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of mRNA splicing, via spliceosome / Formation of a pool of free 40S subunits / preribosome, large subunit precursor / Antigen processing: Ubiquitination & Proteasome degradation / L13a-mediated translational silencing of Ceruloplasmin expression / positive regulation of translational initiation / translational elongation / ribosomal large subunit export from nucleus / 90S preribosome / translation elongation factor activity / subtelomeric heterochromatin formation / regulation of translational fidelity / proteasomal protein catabolic process / protein-RNA complex assembly / translational termination / maturation of LSU-rRNA / cytosolic ribosome / rescue of stalled ribosome / translation initiation factor activity / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit biogenesis / translational initiation / macroautophagy / protein catabolic process / RING-type E3 ubiquitin transferase / maintenance of translational fidelity / modification-dependent protein catabolic process / protein tag activity / cytoplasmic stress granule / rRNA processing / ubiquitin-protein transferase activity / ubiquitin protein ligase activity / ribosome biogenesis / chromatin organization / ribosome binding / 5S rRNA binding / ribosomal large subunit assembly / ubiquitin-dependent protein catabolic process / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / chromosome, telomeric region / negative regulation of translation / rRNA binding / protein ubiquitination / ribosome / structural constituent of ribosome / translation / response to antibiotic / mRNA binding / ubiquitin protein ligase binding / nucleolus / perinuclear region of cytoplasm / mitochondrion / RNA binding / zinc ion binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
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: 2.4 Å | ||||||
![]() | Tesina, P. / Buschauer, R. / Beckmann, R. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Molecular basis of eIF5A-dependent CAT tailing in eukaryotic ribosome-associated quality control. 著者: Petr Tesina / Shuhei Ebine / Robert Buschauer / Matthias Thoms / Yoshitaka Matsuo / Toshifumi Inada / Roland Beckmann / ![]() ![]() 要旨: Ribosome-associated quality control (RQC) is a conserved process degrading potentially toxic truncated nascent peptides whose malfunction underlies neurodegeneration and proteostasis decline in aging. ...Ribosome-associated quality control (RQC) is a conserved process degrading potentially toxic truncated nascent peptides whose malfunction underlies neurodegeneration and proteostasis decline in aging. During RQC, dissociation of stalled ribosomes is followed by elongation of the nascent peptide with alanine and threonine residues, driven by Rqc2 independently of mRNA, the small ribosomal subunit and guanosine triphosphate (GTP)-hydrolyzing factors. The resulting CAT tails (carboxy-terminal tails) and ubiquitination by Ltn1 mark nascent peptides for proteasomal degradation. Here we present ten cryogenic electron microscopy (cryo-EM) structures, revealing the mechanistic basis of individual steps of the CAT tailing cycle covering initiation, decoding, peptidyl transfer, and tRNA translocation. We discovered eIF5A as a crucial eukaryotic RQC factor enabling peptidyl transfer. Moreover, we observed dynamic behavior of RQC factors and tRNAs allowing for processivity of the CAT tailing cycle without additional energy input. Together, these results elucidate key differences as well as common principles between CAT tailing and canonical translation. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 3.3 MB | 表示 | ![]() |
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PDB形式 | ![]() | 表示 | ![]() | |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 15427MC ![]() 8aafC ![]() 8agtC ![]() 8aguC ![]() 8agvC ![]() 8agwC ![]() 8agzC 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 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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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
+60S ribosomal protein ... , 42種, 42分子 ABCDEFGHIJKLMNOPQRSTUVWXYbcdjk...
-タンパク質 , 5種, 5分子 Zaev0
#26: タンパク質 | 分子量: 14583.077 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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#45: タンパク質 | 分子量: 119250.234 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#46: タンパク質 | 分子量: 180372.984 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#47: タンパク質 | 分子量: 17222.406 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#51: タンパク質 | 分子量: 33749.121 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
-RNA鎖 , 4種, 5分子 fhixy
#30: RNA鎖 | 分子量: 1097086.500 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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#31: RNA鎖 | 分子量: 38951.105 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#32: RNA鎖 | 分子量: 50682.922 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
#49: RNA鎖 | 分子量: 24503.461 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
-タンパク質・ペプチド , 1種, 1分子 1
#52: タンパク質・ペプチド | 分子量: 1549.902 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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-非ポリマー , 3種, 21分子 




#53: 化合物 | ChemComp-MG / #54: 化合物 | ChemComp-ZN / #55: 化合物 | ChemComp-SPD / | |
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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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Has protein modification | Y |
-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: Yeast RQC complex in state with the RING domain of Ltn1 in the IN position タイプ: RIBOSOME / Entity ID: #1-#52 / 由来: NATURAL |
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由来(天然) | 生物種: ![]() ![]() |
緩衝液 | pH: 6.8 |
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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 4000 nm / 最小 デフォーカス(公称値): 400 nm |
撮影 | 電子線照射量: 46 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: 2.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 124605 / 対称性のタイプ: POINT |