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基本情報
| 登録情報 | データベース: PDB / ID: 9khs | |||||||||||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of Ufd2/Ubc4-Ub in complex with K29-linked diUb (monomeric conformation) | |||||||||||||||||||||||||||||||||
要素 |
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キーワード | LIGASE / E4 enzyme / Ub ligase / Ufd2 / Ubc4 / Branching / K48/29 | |||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報Peroxisomal protein import / Synthesis of active ubiquitin: roles of E1 and E2 enzymes / mitochondria-associated ubiquitin-dependent protein catabolic process / cytoplasm protein quality control by the ubiquitin-proteasome system / E3 ubiquitin ligases ubiquitinate target proteins / ubiquitin-dependent protein catabolic process via the multivesicular body sorting pathway / ribosome-associated ubiquitin-dependent protein catabolic process / E2 ubiquitin-conjugating enzyme / ubiquitin-ubiquitin ligase activity / Formation of the ternary complex, and subsequently, the 43S complex ...Peroxisomal protein import / Synthesis of active ubiquitin: roles of E1 and E2 enzymes / mitochondria-associated ubiquitin-dependent protein catabolic process / cytoplasm protein quality control by the ubiquitin-proteasome system / E3 ubiquitin ligases ubiquitinate target proteins / ubiquitin-dependent protein catabolic process via the multivesicular body sorting pathway / ribosome-associated ubiquitin-dependent protein catabolic process / E2 ubiquitin-conjugating enzyme / ubiquitin-ubiquitin ligase activity / Formation of the ternary complex, and subsequently, the 43S complex / Ribosomal scanning and start codon recognition / proteasome binding / Translation initiation complex formation / ubiquitin conjugating enzyme activity / SARS-CoV-1 modulates host translation machinery / cellular response to ethanol / Antigen processing: Ubiquitination & Proteasome degradation / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / Eukaryotic Translation Termination / SRP-dependent cotranslational protein targeting to membrane / Response of EIF2AK4 (GCN2) to amino acid deficiency / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / ubiquitin ligase complex / L13a-mediated translational silencing of Ceruloplasmin expression / Major pathway of rRNA processing in the nucleolus and cytosol / protein K48-linked ubiquitination / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / ERAD pathway / Maturation of protein E / Maturation of protein E / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora / FLT3 signaling by CBL mutants / IRAK2 mediated activation of TAK1 complex / Prevention of phagosomal-lysosomal fusion / Alpha-protein kinase 1 signaling pathway / Glycogen synthesis / IRAK1 recruits IKK complex / IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation / Endosomal Sorting Complex Required For Transport (ESCRT) / Membrane binding and targetting of GAG proteins / Negative regulation of FLT3 / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / PTK6 Regulates RTKs and Their Effectors AKT1 and DOK1 / Regulation of TBK1, IKKε-mediated activation of IRF3, IRF7 upon TLR3 ligation / Constitutive Signaling by NOTCH1 HD Domain Mutants / IRAK2 mediated activation of TAK1 complex upon TLR7/8 or 9 stimulation / cytosolic ribosome / NOTCH2 Activation and Transmission of Signal to the Nucleus / TICAM1,TRAF6-dependent induction of TAK1 complex / rescue of stalled cytosolic ribosome / TICAM1-dependent activation of IRF3/IRF7 / APC/C:Cdc20 mediated degradation of Cyclin B / Downregulation of ERBB4 signaling / Regulation of FZD by ubiquitination / APC-Cdc20 mediated degradation of Nek2A / p75NTR recruits signalling complexes / InlA-mediated entry of Listeria monocytogenes into host cells / TRAF6 mediated IRF7 activation in TLR7/8 or 9 signaling / TRAF6-mediated induction of TAK1 complex within TLR4 complex / Regulation of pyruvate metabolism / NF-kB is activated and signals survival / Regulation of innate immune responses to cytosolic DNA / Pexophagy / Downregulation of ERBB2:ERBB3 signaling / NRIF signals cell death from the nucleus / VLDLR internalisation and degradation / Regulation of PTEN localization / Activated NOTCH1 Transmits Signal to the Nucleus / Regulation of BACH1 activity / Synthesis of active ubiquitin: roles of E1 and E2 enzymes / MAP3K8 (TPL2)-dependent MAPK1/3 activation / Translesion synthesis by REV1 / TICAM1, RIP1-mediated IKK complex recruitment / Translesion synthesis by POLK / InlB-mediated entry of Listeria monocytogenes into host cell / Activation of IRF3, IRF7 mediated by TBK1, IKKε (IKBKE) / JNK (c-Jun kinases) phosphorylation and activation mediated by activated human TAK1 / Downregulation of TGF-beta receptor signaling / ubiquitin binding / Josephin domain DUBs / positive regulation of protein ubiquitination / Translesion synthesis by POLI / Gap-filling DNA repair synthesis and ligation in GG-NER / IKK complex recruitment mediated by RIP1 / Regulation of activated PAK-2p34 by proteasome mediated degradation / PINK1-PRKN Mediated Mitophagy / TGF-beta receptor signaling in EMT (epithelial to mesenchymal transition) / TNFR1-induced NF-kappa-B signaling pathway / Autodegradation of Cdh1 by Cdh1:APC/C / TCF dependent signaling in response to WNT / APC/C:Cdc20 mediated degradation of Securin / Regulation of NF-kappa B signaling / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / Asymmetric localization of PCP proteins / activated TAK1 mediates p38 MAPK activation 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: 4.31 Å | |||||||||||||||||||||||||||||||||
データ登録者 | Ai, H.S. / Tong, Z.B. / Liu, L. | |||||||||||||||||||||||||||||||||
| 資金援助 | 中国, 1件
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引用 | ジャーナル: Nat Chem Biol / 年: 2025タイトル: Structural basis for E4 enzyme Ufd2-catalyzed K48/K29 branched ubiquitin chains. 著者: Zebin Tong / Xiangwei Wu / Hongyi Cai / Shidian Wu / Tianyi Zhang / Zhiheng Deng / Ziyu Xu / Rujing Yuan / Huasong Ai / Lei Liu / Man Pan / ![]() 要旨: E4 enzymes amplify and remodel ubiquitin chain signals beyond the conventional E1-E2-E3 cascade. The first identified E4 enzyme Ufd2 preferentially catalyzes K48/K29 branched ubiquitin chains, yet ...E4 enzymes amplify and remodel ubiquitin chain signals beyond the conventional E1-E2-E3 cascade. The first identified E4 enzyme Ufd2 preferentially catalyzes K48/K29 branched ubiquitin chains, yet the structural mechanism remains unknown. Here, we combined chemical biology and cryo-electron microscopy to visualize stable intermediates in Ufd2 loading ubiquitin at K48 of proximal ubiquitin on K29-linked di- and triubiquitin. Our data reveal that the core region of Ufd2 functions as an unprecedented K29 diubiquitin binding domain, interacting extensively with proximal and distal ubiquitin, which orients the K48 site of proximal ubiquitin toward the active site of Ubc4, facilitating K48/K29 branched ubiquitin chain formation. We also identified a unique dimeric conformation where dimerized Ufd2 and Ubc4 stabilize each other's distal ubiquitin during branching on K29 triubiquitin. Our findings provide mechanistic insights into the assembly of K48/K29 branched ubiquitin chains by the E4 enzyme Ufd2 and highlight the spatial cooperation among multiple pairs of ubiquitin-related enzymes on longer ubiquitin chains. | |||||||||||||||||||||||||||||||||
| 履歴 |
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構造の表示
| 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 | 9khs.cif.gz | 218.7 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9khs.ent.gz | 172.2 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9khs.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 | 9khs_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 9khs_full_validation.pdf.gz | 1.1 MB | 表示 | |
| XML形式データ | 9khs_validation.xml.gz | 42 KB | 表示 | |
| CIF形式データ | 9khs_validation.cif.gz | 65.9 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/kh/9khs ftp://data.pdbj.org/pub/pdb/validation_reports/kh/9khs | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 62353MC ![]() 9khtC ![]() 9m7oC 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 F&H 検索 |
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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
| #1: タンパク質 | 分子量: 16442.586 Da / 分子数: 1 / 変異: C22S/C102S / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: UBC4, YBR082C, YBR0745 / 発現宿主: ![]() |
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| #2: タンパク質 | 分子量: 8665.881 Da / 分子数: 1 / 変異: K48C / 由来タイプ: 組換発現 / 詳細: K29diUb (proximal Ub) / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: UBC / 発現宿主: ![]() |
| #3: タンパク質 | 分子量: 8604.845 Da / 分子数: 1 / 変異: K29R / 由来タイプ: 組換発現 / 詳細: K29diUb (distal Ub) / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: UBC / 発現宿主: ![]() |
| #4: タンパク質 | 分子量: 8576.831 Da / 分子数: 1 / 由来タイプ: 組換発現 / 詳細: K48Ub (Donor Ubiquitin) / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: RPS27A, UBA80, UBCEP1 / 発現宿主: ![]() |
| #5: タンパク質 | 分子量: 110044.523 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: UFD2, YDL190C, D1255 / 発現宿主: ![]() |
| Has protein modification | N |
-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: Ufd2/Ufd4-Ub in complex with K29-linked diUb / タイプ: COMPLEX / Entity ID: #5, #2-#4, #1 / 由来: MULTIPLE SOURCES |
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| 由来(天然) | 生物種: ![]() |
| 由来(組換発現) | 生物種: ![]() |
| 緩衝液 | pH: 7.5 |
| 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: TFS 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 / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1500 nm |
| 撮影 | 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
| CTF補正 | タイプ: NONE |
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| 3次元再構成 | 解像度: 4.31 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 191564 / 対称性のタイプ: POINT |
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Homo sapiens (ヒト)
中国, 1件
引用






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FIELD EMISSION GUN