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Yorodumi- EMDB-47990: Cryo-EM structure of COP9 signalosome precatalytic state with ned... -
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| Title | Cryo-EM structure of COP9 signalosome precatalytic state with neddylated cullin-3 | |||||||||
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Keywords | COP9 / COP9 signalosome / signalosome / NEDD8 / CSN5i-3 / deneddylation / CSN5 / metalloprotease / SIGNALING PROTEIN | |||||||||
| Function / homology | Function and homology informationpositive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / COP9 signalosome assembly / POZ domain binding / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / regulation of IRE1-mediated unfolded protein response / exosomal secretion / GTPase inhibitor activity ...positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / COP9 signalosome assembly / POZ domain binding / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / regulation of IRE1-mediated unfolded protein response / exosomal secretion / GTPase inhibitor activity / deNEDDylase activity / polar microtubule / regulation protein catabolic process at postsynapse / anaphase-promoting complex-dependent catabolic process / nuclear protein quality control by the ubiquitin-proteasome system / COPII vesicle coat assembly / protein deneddylation / regulation of protein neddylation / activation of NF-kappaB-inducing kinase activity / eukaryotic translation initiation factor 3 complex / negative regulation of beige fat cell differentiation / RHOBTB3 ATPase cycle / cellular response to camptothecin / COP9 signalosome / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / embryonic cleavage / cullin-RING ubiquitin ligase complex / Cul7-RING ubiquitin ligase complex / cellular response to chemical stress / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / positive regulation of mitotic metaphase/anaphase transition / positive regulation of protein autoubiquitination / Notch binding / fibroblast apoptotic process / RNA polymerase II transcription initiation surveillance / protein neddylation / cell projection organization / Hydrolases; Acting on peptide bonds (peptidases) / NEDD8 ligase activity / negative regulation of Rho protein signal transduction / protein K27-linked ubiquitination / RHOBTB1 GTPase cycle / regulation of JNK cascade / negative regulation of response to oxidative stress / regulation of DNA damage response, signal transduction by p53 class mediator / VCB complex / inner cell mass cell proliferation / Cul5-RING ubiquitin ligase complex / metal-dependent deubiquitinase activity / stem cell division / ubiquitin-ubiquitin ligase activity / mitotic metaphase chromosome alignment / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / SCF ubiquitin ligase complex / Cul2-RING ubiquitin ligase complex / stress fiber assembly / Cul3-RING ubiquitin ligase complex / negative regulation of type I interferon production / positive regulation of cytokinesis / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Prolactin receptor signaling / negative regulation of mitophagy / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / TGF-beta receptor signaling activates SMADs / regulation of proteolysis / : / regulation of postsynapse assembly / skeletal muscle cell differentiation / response to light stimulus / cullin family protein binding / anatomical structure morphogenesis / endoplasmic reticulum to Golgi vesicle-mediated transport / protein monoubiquitination / RHOBTB2 GTPase cycle / sperm flagellum / protein autoubiquitination / site of DNA damage / JNK cascade / signal transduction in response to DNA damage / Nuclear events stimulated by ALK signaling in cancer / protein K48-linked ubiquitination / transcription-coupled nucleotide-excision repair / translation initiation factor activity / gastrulation / negative regulation of insulin receptor signaling pathway / regulation of cellular response to insulin stimulus / positive regulation of TORC1 signaling / post-translational protein modification / intrinsic apoptotic signaling pathway / cyclin binding / positive regulation of protein ubiquitination / T cell activation / protein modification process / Regulation of BACH1 activity / integrin-mediated signaling pathway / negative regulation of canonical NF-kappaB signal transduction Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.93 Å | |||||||||
Authors | Shi H / Zheng N | |||||||||
| Funding support | United States, 1 items
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Citation | Journal: Nature / Year: 2026Title: CSN5i-3 is an orthosteric molecular glue inhibitor of COP9 signalosome. Authors: 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 / ...Authors: 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 / ![]() Abstract: 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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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_47990.map.gz | 228.5 MB | EMDB map data format | |
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| Header (meta data) | emd-47990-v30.xml emd-47990.xml | 30.7 KB 30.7 KB | Display Display | EMDB header |
| Images | emd_47990.png | 58.3 KB | ||
| Filedesc metadata | emd-47990.cif.gz | 9.1 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-47990 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-47990 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9eglMC ![]() 9e5zC ![]() 9e77C ![]() 9e81C ![]() 9efmC ![]() 9efqC ![]() 9efvC ![]() 9eg1C ![]() 9eg8C ![]() 9ph4C C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_47990.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.885 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : The complex of human COP9 signalosome with NEDD8 and CSN5i-3
+Supramolecule #1: The complex of human COP9 signalosome with NEDD8 and CSN5i-3
+Macromolecule #1: COP9 signalosome complex subunit 1
+Macromolecule #2: COP9 signalosome complex subunit 2
+Macromolecule #3: COP9 signalosome complex subunit 3
+Macromolecule #4: COP9 signalosome complex subunit 4
+Macromolecule #5: COP9 signalosome complex subunit 5
+Macromolecule #6: COP9 signalosome complex subunit 6
+Macromolecule #7: COP9 signalosome complex subunit 7b
+Macromolecule #8: COP9 signalosome complex subunit 8
+Macromolecule #9: NEDD8
+Macromolecule #10: Cullin-3
+Macromolecule #11: E3 ubiquitin-protein ligase RBX1
+Macromolecule #12: ZINC ION
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | TFS GLACIOS |
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| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2 |
| Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
United States, 1 items
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Processing
FIELD EMISSION GUN