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基本情報
| 登録情報 | データベース: PDB / ID: 9pdl | ||||||
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| タイトル | Nub1/Fat10-processing human 26S proteasome with Rpt5 at top of spiral staircase (AAA+ locally refined) | ||||||
要素 |
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キーワード | MOTOR PROTEIN / 26S Proteasome / HYDROLASE-PROTEIN BINDING complex | ||||||
| 機能・相同性 | 機能・相同性情報thyrotropin-releasing hormone receptor binding / nuclear proteasome complex / host-mediated perturbation of viral transcription / positive regulation of inclusion body assembly / 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素; オメガペプチターゼ / proteasome accessory complex / purine ribonucleoside triphosphate binding / cytosolic proteasome complex / positive regulation of proteasomal protein catabolic process / proteasome-activating activity ...thyrotropin-releasing hormone receptor binding / nuclear proteasome complex / host-mediated perturbation of viral transcription / positive regulation of inclusion body assembly / 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素; オメガペプチターゼ / proteasome accessory complex / purine ribonucleoside triphosphate binding / cytosolic proteasome complex / positive regulation of proteasomal protein catabolic process / proteasome-activating activity / proteasome regulatory particle, lid subcomplex / proteasome regulatory particle, base subcomplex / metal-dependent deubiquitinase activity / protein K63-linked deubiquitination / negative regulation of programmed cell death / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / Somitogenesis / K63-linked deubiquitinase activity / proteasome binding / transcription factor binding / myofibril / general transcription initiation factor binding / blastocyst development / positive regulation of RNA polymerase II transcription preinitiation complex assembly / protein deubiquitination / immune system process / NF-kappaB binding / endopeptidase activator activity / proteasome core complex, alpha-subunit complex / SARS-CoV-1 targets host intracellular signalling and regulatory pathways / regulation of proteasomal protein catabolic process / ERAD pathway / inclusion body / proteasome complex / TBP-class protein binding / proteolysis involved in protein catabolic process / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / TNFR2 non-canonical NF-kB pathway / AUF1 (hnRNP D0) binds and destabilizes mRNA / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / negative regulation of inflammatory response to antigenic stimulus / P-body / Degradation of AXIN / lipopolysaccharide binding / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / G2/M Checkpoints / Hedgehog ligand biogenesis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / Negative regulation of NOTCH4 signaling / Regulation of RUNX3 expression and activity / Hedgehog 'on' state / Vif-mediated degradation of APOBEC3G / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / double-strand break repair via homologous recombination / MAPK6/MAPK4 signaling / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family proteins mediated transport / double-strand break repair via nonhomologous end joining / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / response to virus / FCERI mediated NF-kB activation / Regulation of expression of SLITs and ROBOs / Metalloprotease DUBs / Regulation of PTEN stability and activity / nuclear matrix / Interleukin-1 signaling / cytoplasmic ribonucleoprotein granule / Orc1 removal from chromatin / metallopeptidase activity / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / osteoblast differentiation / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids 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: 2.76 Å | ||||||
データ登録者 | Arkinson, C. / Gee, C.L. / Martin, A. | ||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: Nat Struct Mol Biol / 年: 2025タイトル: Structural landscape of the degrading 26S proteasome reveals conformation-specific binding of TXNL1. 著者: Connor Arkinson / Christine L Gee / Zeyuan Zhang / Ken C Dong / Andreas Martin / ![]() 要旨: The 26S proteasome targets many cellular proteins for degradation during homeostasis and quality control. Proteasome-interacting cofactors modulate these functions and aid in substrate degradation. ...The 26S proteasome targets many cellular proteins for degradation during homeostasis and quality control. Proteasome-interacting cofactors modulate these functions and aid in substrate degradation. Here we solve high-resolution structures of the redox active cofactor TXNL1 bound to the human 26S proteasome at saturating and substoichiometric concentrations by time-resolved cryo-electron microscopy (cryo-EM). We identify distinct binding modes of TXNL1 that depend on the proteasome conformation and ATPase motor states. Together with biophysical and biochemical experiments, we show that the resting-state proteasome binds TXNL1 with low affinity and in variable positions on top of the Rpn11 deubiquitinase. In contrast, in the actively degrading proteasome, TXNL1 uses additional interactions for high-affinity binding, whereby its C-terminal tail covers the catalytic groove of Rpn11 and coordinates the active-site Zn. Furthermore, these cryo-EM structures of the degrading proteasome capture the ATPase hexamer in several spiral-staircase arrangements that indicate temporally asymmetric hydrolysis and conformational changes in bursts during mechanical substrate unfolding and translocation. Remarkably, we catch the proteasome in the act of unfolding the β-barrel mEos3.2 substrate while the ATPase hexamer is in a particular staircase register. Our findings advance current models for protein translocation through hexameric AAA+ motors and reveal how the proteasome uses its distinct conformational states to coordinate cofactor binding and substrate processing. #1: ジャーナル: bioRxiv / 年: 2024 タイトル: Structural landscape of AAA+ ATPase motor states in the substrate-degrading human 26S proteasome reveals conformation-specific binding of TXNL1. 著者: Connor Arkinson / Christine L Gee / Zeyuan Zhang / Ken C Dong / Andreas Martin / ![]() 要旨: The 26S proteasome targets many cellular proteins for degradation during general homeostasis, protein quality control, and the regulation of vital processes. A broad range of proteasome-interacting ...The 26S proteasome targets many cellular proteins for degradation during general homeostasis, protein quality control, and the regulation of vital processes. A broad range of proteasome-interacting cofactors thereby modulates these functions and aids in substrate degradation. Here, we solved several high-resolution structures of the redox active cofactor TXNL1 bound to the human 26S proteasome at saturating and sub-stoichiometric concentrations by time resolved cryo-EM. We identified distinct binding modes of TXNL1 that depend on the proteasome conformational and ATPase motor states. Together with biophysical and biochemical experiments, our structural studies reveal that the resting-state proteasome prior to substrate engagement with the ATPase motor binds TXNL1 with low affinity and in variable positions on top of the Rpn11 deubiquitinase. In contrast, the actively degrading proteasome shows additional interactions leading to high-affinity TXNL1 binding, whereby TXNL1's C-terminal tail covers the catalytic groove of the Rpn11 deubiquitinase and coordinates the active-site Zn. Furthermore, these cryo-EM structures of the degrading proteasome capture the ATPase hexamer in all registers of spiral-staircase arrangements and thus visualize the complete ATP-hydrolysis cycle of the AAA+ motor, indicating temporally asymmetric hydrolysis and conformational changes in bursts during mechanical substrate unfolding and translocation. Remarkably, we catch the proteasome in the act of unfolding the beta-barrel mEos3.2 substrate while the ATPase hexamer is in a particular spiral staircase register. Our findings challenge current models for protein translocation through hexameric AAA+ motors and reveal how the proteasome uses its distinct but broad range of conformational states to coordinate cofactor binding and substrate processing. | ||||||
| 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 | 9pdl.cif.gz | 846.9 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9pdl.ent.gz | 表示 | PDB形式 | |
| PDBx/mmJSON形式 | 9pdl.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 | 9pdl_validation.pdf.gz | 2.2 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 9pdl_full_validation.pdf.gz | 2.3 MB | 表示 | |
| XML形式データ | 9pdl_validation.xml.gz | 127.8 KB | 表示 | |
| CIF形式データ | 9pdl_validation.cif.gz | 195.7 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/pd/9pdl ftp://data.pdbj.org/pub/pdb/validation_reports/pd/9pdl | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 71537MC ![]() 9e8gC ![]() 9e8hC ![]() 9e8iC ![]() 9e8jC ![]() 9e8kC ![]() 9e8lC ![]() 9e8nC ![]() 9e8oC ![]() 9e8qC ![]() 9pdiC ![]() 9pdnC ![]() 9pf1C 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
-26S protease regulatory subunit ... , 2種, 2分子 CE
| #1: タンパク質 | 分子量: 45694.047 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMC5, SUG1 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P62195 |
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| #13: タンパク質 | 分子量: 44241.008 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMC6, SUG2 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P62333 |
-Proteasome subunit alpha type- ... , 7種, 7分子 GHIJLMK
| #2: タンパク質 | 分子量: 27432.459 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA6, PROS27 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P60900, proteasome endopeptidase complex |
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| #3: タンパク質 | 分子量: 25927.535 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA2, HC3, PSC3 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P25787, proteasome endopeptidase complex |
| #4: タンパク質 | 分子量: 29525.842 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA4, HC9, PSC9 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P25789, proteasome endopeptidase complex |
| #5: タンパク質 | 分子量: 27957.943 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA7, HSPC / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O14818 |
| #6: タンパク質 | 分子量: 29595.627 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA1, HC2, NU, PROS30, PSC2 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P25786, proteasome endopeptidase complex |
| #7: タンパク質 | 分子量: 28469.252 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA3, HC8, PSC8 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P25788, proteasome endopeptidase complex |
| #15: タンパク質 | 分子量: 26494.080 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMA5 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P28066 |
-26S proteasome regulatory subunit ... , 4種, 4分子 ABDF
| #10: タンパク質 | 分子量: 48700.805 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMC2, MSS1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P35998 |
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| #11: タンパク質 | 分子量: 49260.504 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMC1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P62191 |
| #12: タンパク質 | 分子量: 47426.141 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMC4, MIP224, TBP7 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P43686 |
| #14: タンパク質 | 分子量: 49266.457 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMC3, TBP1 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P17980 |
-タンパク質 / タンパク質・ペプチド , 2種, 2分子 cv
| #8: タンパク質 | 分子量: 46940.898 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: PSMD14 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O00487 |
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| #9: タンパク質・ペプチド | 分子量: 1039.273 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: Homo sapiens (ヒト) |
-非ポリマー , 4種, 12分子 






| #16: 化合物 | | #17: 化合物 | ChemComp-MG / #18: 化合物 | ChemComp-ZN / | #19: 化合物 | |
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-詳細
| 研究の焦点であるリガンドがあるか | Y |
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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: Human 26S proteasome complexed with Nub1 and Fat10 RPT5 at the top タイプ: COMPLEX / Entity ID: #1-#15 / 由来: RECOMBINANT |
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| 分子量 | 値: 2.6 MDa / 実験値: NO |
| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: HEK293 |
| 緩衝液 | pH: 7.4 詳細: 30 mM HEPES pH7.4, 25 mM NaCl, 25 mM KCl, 3% (v/v) glycerol, 5 mM MgCl2 2 mM ATP and 0.5 mM TCEP |
| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: UltrAuFoil R2/2 |
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 298 K |
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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): 1700 nm / 最小 デフォーカス(公称値): 500 nm / アライメント法: BASIC |
| 試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
| 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
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.76 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 66749 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 拘束条件 |
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万見について




Homo sapiens (ヒト)
米国, 1件
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FIELD EMISSION GUN