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基本情報
| 登録情報 | データベース: PDB / ID: 9hmn | ||||||||||||||||||||||||||||||
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| タイトル | CryoEM structure of human 20S proteasome in complex with proteasome inhibitor Salinosporamid A | ||||||||||||||||||||||||||||||
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キーワード | HYDROLASE / Inhibitor / 20S proteasome / Salinosporamid A | ||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報purine ribonucleoside triphosphate binding / Antigen processing: Ub, ATP-independent proteasomal degradation / sperm glycocalyx / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / perinuclear theca / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / myofibril ...purine ribonucleoside triphosphate binding / Antigen processing: Ub, ATP-independent proteasomal degradation / sperm glycocalyx / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / perinuclear theca / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / myofibril / proteasomal ubiquitin-independent protein catabolic process / sperm head-tail coupling apparatus / immune system process / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / threonine-type endopeptidase activity / proteasome assembly / proteasome core complex, alpha-subunit complex / ciliary tip / : / proteasome complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / sarcomere / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / 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 / sperm end piece / centriole / negative regulation of inflammatory response to antigenic stimulus / P-body / Assembly of the pre-replicative complex / Vpu mediated degradation of CD4 / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / lipopolysaccharide binding / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of CRY and PER proteins / Degradation of AXIN / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / G2/M Checkpoints / Hedgehog ligand biogenesis / Degradation of GLI1 by the proteasome / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / Regulation of RUNX3 expression and activity / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / Hedgehog 'on' state / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Vif-mediated degradation of APOBEC3G / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / MAPK6/MAPK4 signaling / Degradation of CDH1 / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family protein mediated transport / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / FCERI mediated NF-kB activation / response to virus / Regulation of expression of SLITs and ROBOs / nuclear matrix / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / UCH proteinases / KEAP1-NFE2L2 pathway / Downstream TCR signaling / peptidase activity / Antigen processing: Ubiquitination & Proteasome degradation / sperm principal piece / RUNX1 regulates transcription of genes involved in differentiation of HSCs / ER-Phagosome pathway / Neddylation / regulation of inflammatory response / response to oxidative stress / sperm midpiece / secretory granule lumen / endopeptidase activity / ficolin-1-rich granule lumen / proteasome-mediated ubiquitin-dependent protein catabolic process / positive regulation of canonical NF-kappaB signal transduction / Ub-specific processing proteases / cilium / nuclear body 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: 2.55 Å | ||||||||||||||||||||||||||||||
データ登録者 | Suelzen, H. / Boura, E. / Silhan, J. | ||||||||||||||||||||||||||||||
| 資金援助 | 1件
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引用 | ジャーナル: Molecules / 年: 2025タイトル: Structural Insights into Salinosporamide a Mediated Inhibition of the Human 20S Proteasome. 著者: Hagen Sülzen / Pavla Fajtova / Anthony J O'Donoghue / Jan Silhan / Evzen Boura / ![]() 要旨: The 20S proteasome, a critical component of the ubiquitin-proteasome system, plays a central role in regulating protein degradation in eukaryotic cells. Marizomib (MZB), also known as salinosporamide ...The 20S proteasome, a critical component of the ubiquitin-proteasome system, plays a central role in regulating protein degradation in eukaryotic cells. Marizomib (MZB), also known as salinosporamide A, is a natural γ-lactam-β-lactone compound derived from and is a potent 20S proteasome covalent inhibitor with demonstrated anticancer properties. Its broad-spectrum inhibition of all three proteasome subunits and its ability to cross the blood-brain barrier has made it a promising therapeutic candidate for glioblastoma. In addition to this, MZB also demonstrates significant inhibition against the 20S proteasome of (20S), a protozoan parasite, suggesting its potential for parasitic treatments. Here, we present the cryo-EM structure of the human 20S proteasome in complex with MZB at 2.55 Å resolution. This structure reveals the binding mode of MZB to all six catalytic subunits within the two β-rings of the 20S proteasome, providing a detailed molecular understanding of its irreversible inhibitory mechanism. These findings enhance the therapeutic potential of MZB for both cancer and parasitic diseases at the molecular level and highlight marine-derived natural products in targeting the proteasome for therapeutic applications. #1: ジャーナル: bioRxiv / 年: 2025 タイトル: Structural insights into Salinosporamide A mediated inhibition of the human 20S proteasome. 著者: Hagen Sülzen / Pavla Fajtova / Anthony J O'Donoghue / Evzen Boura / Jan Silhan / ![]() 要旨: The 20S proteasome, a critical component of the ubiquitin-proteasome system, plays a central role in regulating protein degradation in eukaryotic cells. Marizomib (MZB), a natural γ-lactam-β- ...The 20S proteasome, a critical component of the ubiquitin-proteasome system, plays a central role in regulating protein degradation in eukaryotic cells. Marizomib (MZB), a natural γ-lactam-β-lactone compound derived from , is a potent 20S proteasome covalent inhibitor with demonstrated anticancer properties. Its broad-spectrum inhibition of all three proteasome subunits and ability to cross the blood-brain barrier has made it a promising therapeutic candidate for glioblastoma. Here, we present the cryo-EM structure of the human 20S proteasome in complex with MZB at 2.55 Å resolution. This structure reveals the binding mode of MZB to all six catalytic subunits within the two β-rings of the 20S proteasome, providing a detailed molecular understanding of its irreversible inhibitory mechanism. These findings explain the therapeutic potential of MZB at the molecular level and highlight marine-derived natural products in targeting the proteasome for anticancer treatment. | ||||||||||||||||||||||||||||||
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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 | 9hmn.cif.gz | 1.1 MB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9hmn.ent.gz | 952.6 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9hmn.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/hm/9hmn ftp://data.pdbj.org/pub/pdb/validation_reports/hm/9hmn | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 52296MC 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
-Proteasome subunit alpha type- ... , 7種, 14分子 AOBPCQERFSGTDY
| #1: タンパク質 | 分子量: 27432.459 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P60900#2: タンパク質 | 分子量: 25796.338 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P25787#3: タンパク質 | 分子量: 29525.842 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P25789, proteasome endopeptidase complex#4: タンパク質 | 分子量: 26435.977 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P28066, proteasome endopeptidase complex#5: タンパク質 | 分子量: 29595.627 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P25786#6: タンパク質 | 分子量: 28338.057 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P25788#11: タンパク質 | 分子量: 27929.891 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: O14818 |
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-Proteasome subunit beta type- ... , 7種, 14分子 JUKVMWNXHZIaLb
| #7: タンパク質 | 分子量: 22841.701 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P49720, proteasome endopeptidase complex#8: タンパク質 | 分子量: 22864.277 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P49721, proteasome endopeptidase complex#9: タンパク質 | 分子量: 23578.986 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P20618, proteasome endopeptidase complex#10: タンパク質 | 分子量: 24414.740 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P28070, proteasome endopeptidase complex#12: タンパク質 | 分子量: 21921.836 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P28072, proteasome endopeptidase complex#13: タンパク質 | 分子量: 25321.980 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: Q99436, proteasome endopeptidase complex#14: タンパク質 | 分子量: 22484.369 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P28074, proteasome endopeptidase complex |
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-非ポリマー , 1種, 6分子 
| #15: 化合物 | ChemComp-SA1 / ( |
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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 20S proteasome in complex with proteasome inhibitor Salinosporamid A タイプ: COMPLEX / Entity ID: #1-#11 / 由来: NATURAL |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 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 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 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): 2500 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 2.7 mm |
| 撮影 | 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (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 | |||||||||||||||||||||||||
| 対称性 | 点対称性: C2 (2回回転対称) | |||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.55 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 209737 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)
引用


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FIELD EMISSION GUN