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基本情報
| 登録情報 | ![]() | |||||||||
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| タイトル | Cryo-EM structure of COP9 signalosome in complex with CSN5i-1a | |||||||||
マップデータ | ||||||||||
試料 |
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キーワード | COP9 / COP9 signalosome / signalosome / NEDD8 / CSN5i-1a / deneddylation / CSN5 / metalloprotease / SIGNALING PROTEIN | |||||||||
| 機能・相同性 | 機能・相同性情報COP9 signalosome assembly / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / regulation of IRE1-mediated unfolded protein response / exosomal secretion / GTPase inhibitor activity / deNEDDylase activity / protein deneddylation / regulation of protein neddylation / activation of NF-kappaB-inducing kinase activity ...COP9 signalosome assembly / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / regulation of IRE1-mediated unfolded protein response / exosomal secretion / GTPase inhibitor activity / deNEDDylase activity / protein deneddylation / regulation of protein neddylation / activation of NF-kappaB-inducing kinase activity / eukaryotic translation initiation factor 3 complex / COP9 signalosome / protein neddylation / 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素 / RHOBTB1 GTPase cycle / regulation of JNK cascade / regulation of DNA damage response, signal transduction by p53 class mediator / inner cell mass cell proliferation / metal-dependent deubiquitinase activity / : / skeletal muscle cell differentiation / response to light stimulus / JNK cascade / translation initiation factor activity / post-translational protein modification / DNA Damage Recognition in GG-NER / Formation of TC-NER Pre-Incision Complex / neuron differentiation / metallopeptidase activity / synaptic vesicle / transcription corepressor activity / cell junction / Cargo recognition for clathrin-mediated endocytosis / Neddylation / transcription by RNA polymerase II / in utero embryonic development / ubiquitin-dependent protein catabolic process / protein phosphorylation / transcription coactivator activity / regulation of cell cycle / nuclear speck / translation / negative regulation of cell population proliferation / negative regulation of apoptotic process / chromatin / perinuclear region of cytoplasm / enzyme binding / negative regulation of transcription by RNA polymerase II / signal transduction / positive regulation of transcription by RNA polymerase II / proteolysis / extracellular exosome / nucleoplasm / metal ion binding / nucleus / cytoplasm / cytosol 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.0 Å | |||||||||
データ登録者 | Shi H / Zheng N | |||||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: Nature / 年: 2026タイトル: CSN5i-3 is an orthosteric molecular glue inhibitor of COP9 signalosome. 著者: Huigang Shi / Xiaorong Wang / Clinton Yu / Haibin Mao / Fenglong Jiao / Merav Braitbard / Ben Shor / Zhongsheng Zhang / Thomas R Hinds / Shiyun Cao / Erkang Fan / Dina Schneidman-Duhovny / ...著者: Huigang Shi / Xiaorong Wang / Clinton Yu / Haibin Mao / Fenglong Jiao / Merav Braitbard / Ben Shor / Zhongsheng Zhang / Thomas R Hinds / Shiyun Cao / Erkang Fan / Dina Schneidman-Duhovny / Lan Huang / Ning Zheng / ![]() 要旨: Orthosteric inhibitors block enzyme active sites and prevent substrates from binding. Enhancing their specificity through substrate dependence seems inherently unlikely, as their mechanism hinges on ...Orthosteric inhibitors block enzyme active sites and prevent substrates from binding. Enhancing their specificity through substrate dependence seems inherently unlikely, as their mechanism hinges on direct competition rather than selective recognition. Here we show that a molecular glue mechanism unexpectedly imparts substrate-dependent potency to CSN5i-3, an orthosteric inhibitor of the COP9 signalosome (CSN). We first confirm that CSN5i-3 inhibits CSN, which catalyses NEDD8 (N8) deconjugation from the cullin-RING ubiquitin ligases, by occupying the active site of its catalytic subunit, CSN5, and directly competing with the iso-peptide bond substrate. Notably, the orthosteric inhibitor binds free CSN with only micromolar affinity, yet achieves nanomolar potency in blocking its deneddylase activity. Cryogenic electron microscopy structures of the enzyme-substrate-inhibitor complex reveal that active site-engaged CSN5i-3 occludes the substrate iso-peptide linkage while simultaneously extending an N8-binding exosite of CSN5, acting as a molecular glue to cement the N8-CSN5 interaction. The cooperativity of this trimolecular CSN5i-3-N8-CSN5 assembly, in turn, sequesters CSN5i-3 at its binding site, conferring high potency to the orthosteric inhibitor despite its low affinity for the free enzyme. Together, our findings highlight the modest affinity requirements of molecule glues for individual target proteins and establish orthosteric molecular glue inhibitors as a new class of substrate-dependent enzyme antagonists. | |||||||||
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
| マップデータ | emd_71639.map.gz | 116.4 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-71639-v30.xml emd-71639.xml | 31.5 KB 31.5 KB | 表示 表示 | EMDBヘッダ |
| 画像 | emd_71639.png | 36.4 KB | ||
| Filedesc metadata | emd-71639.cif.gz | 8.7 KB | ||
| その他 | emd_71639_half_map_1.map.gz emd_71639_half_map_2.map.gz | 116 MB 116 MB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-71639 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-71639 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 9ph4MC ![]() 9e5zC ![]() 9e77C ![]() 9e81C ![]() 9efmC ![]() 9efqC ![]() 9efvC ![]() 9eg1C ![]() 9eg8C ![]() 9eglC M: このマップから作成された原子モデル 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
| EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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| 「今月の分子」の関連する項目 |
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マップ
| ファイル | ダウンロード / ファイル: emd_71639.map.gz / 形式: CCP4 / 大きさ: 125 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
| ボクセルのサイズ | X=Y=Z: 0.826 Å | ||||||||||||||||||||||||||||||||||||
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| 対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
| 詳細 | EMDB XML:
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-添付データ
-ハーフマップ: #2
| ファイル | emd_71639_half_map_1.map | ||||||||||||
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| 密度ヒストグラム |
-ハーフマップ: #1
| ファイル | emd_71639_half_map_2.map | ||||||||||||
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| 投影像・断面図 |
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試料の構成要素
+全体 : The complex of human COP9 signalosome with NEDD8 and CSN5i-1a
+超分子 #1: The complex of human COP9 signalosome with NEDD8 and CSN5i-1a
+分子 #1: COP9 signalosome complex subunit 1
+分子 #2: COP9 signalosome complex subunit 2
+分子 #3: COP9 signalosome complex subunit 3
+分子 #4: COP9 signalosome complex subunit 4
+分子 #5: COP9 signalosome complex subunit 5
+分子 #6: COP9 signalosome complex subunit 6
+分子 #7: COP9 signalosome complex subunit 7b
+分子 #8: COP9 signalosome complex subunit 8
+分子 #9: ZINC ION
+分子 #10: 6-[(4R,5S,6S)-6-hydroxy-6,7,8,9-tetrahydro-5H-imidazo[1,5-a]azepi...
-実験情報
-構造解析
| 手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
| 試料の集合状態 | particle |
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試料調製
| 緩衝液 | pH: 7.5 |
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| 凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
| 顕微鏡 | TFS KRIOS |
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| 撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 60.0 e/Å2 |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 3.5 µm / 最小 デフォーカス(公称値): 0.8 µm |
| 試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER ホルダー冷却材: NITROGEN |
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
ムービー
コントローラー
万見について




キーワード
Homo sapiens (ヒト)
データ登録者
米国, 1件
引用































Z (Sec.)
Y (Row.)
X (Col.)






































解析
FIELD EMISSION GUN


