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- EMDB-46464: Cryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4 -

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Entry
Database: EMDB / ID: EMD-46464
TitleCryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4
Map data
Sample
  • Complex: Cryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4
    • Protein or peptide: DNA damage-binding protein 1
    • Protein or peptide: Protein cereblon
    • Protein or peptide: Cyclin-dependent kinase 2
    • Protein or peptide: G1/S-specific cyclin-E1
  • Ligand: ZINC ION
  • Ligand: (3R)-3-(5-{4-[(2-{4-[(8-cyclopentyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino]-3-methylbenzene-1-sulfonyl}-7-azaspiro[3.5]nonan-7-yl)methyl]piperidin-1-yl}-4-fluoro-3-methyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-1-yl)piperidine-2,6-dione
Keywordskinase / degrader / ternary complex / CDK2 / CELL CYCLE
Function / homology
Function and homology information


negative regulation of monoatomic ion transmembrane transport / positive regulation of mesenchymal stem cell proliferation / homologous chromosome pairing at meiosis / RHOBTB3 ATPase cycle / positive regulation by virus of viral protein levels in host cell / spindle assembly involved in female meiosis / epigenetic programming in the zygotic pronuclei / Cul4-RING E3 ubiquitin ligase complex / UV-damage excision repair / biological process involved in interaction with symbiont ...negative regulation of monoatomic ion transmembrane transport / positive regulation of mesenchymal stem cell proliferation / homologous chromosome pairing at meiosis / RHOBTB3 ATPase cycle / positive regulation by virus of viral protein levels in host cell / spindle assembly involved in female meiosis / epigenetic programming in the zygotic pronuclei / Cul4-RING E3 ubiquitin ligase complex / UV-damage excision repair / biological process involved in interaction with symbiont / cyclin-dependent protein serine/threonine kinase regulator activity / regulation of mitotic cell cycle phase transition / WD40-repeat domain binding / Cul4A-RING E3 ubiquitin ligase complex / Cul4B-RING E3 ubiquitin ligase complex / cyclin A1-CDK2 complex / cyclin E2-CDK2 complex / ubiquitin ligase complex scaffold activity / cyclin E1-CDK2 complex / cyclin A2-CDK2 complex / positive regulation of DNA-templated DNA replication initiation / cyclin-dependent protein kinase activity / G2 Phase / Y chromosome / Phosphorylation of proteins involved in G1/S transition by active Cyclin E:Cdk2 complexes / positive regulation of heterochromatin formation / p53-Dependent G1 DNA Damage Response / X chromosome / PTK6 Regulates Cell Cycle / G1/S-Specific Transcription / negative regulation of reproductive process / regulation of anaphase-promoting complex-dependent catabolic process / negative regulation of developmental process / Defective binding of RB1 mutants to E2F1,(E2F2, E2F3) / Association of TriC/CCT with target proteins during biosynthesis / microtubule organizing center / centriole replication / locomotory exploration behavior / Regulation of APC/C activators between G1/S and early anaphase / telomere maintenance in response to DNA damage / centrosome duplication / cullin family protein binding / viral release from host cell / G0 and Early G1 / Telomere Extension By Telomerase / Activation of the pre-replicative complex / positive regulation of Wnt signaling pathway / DNA replication initiation / ectopic germ cell programmed cell death / positive regulation of G1/S transition of mitotic cell cycle / cyclin-dependent kinase / cyclin-dependent protein serine/threonine kinase activity / TP53 Regulates Transcription of Genes Involved in G1 Cell Cycle Arrest / negative regulation of protein-containing complex assembly / positive regulation of viral genome replication / Regulation of MITF-M-dependent genes involved in cell cycle and proliferation / Cajal body / Activation of ATR in response to replication stress / Cyclin E associated events during G1/S transition / proteasomal protein catabolic process / Cyclin A/B1/B2 associated events during G2/M transition / Cyclin A:Cdk2-associated events at S phase entry / cyclin-dependent protein kinase holoenzyme complex / condensed chromosome / regulation of G2/M transition of mitotic cell cycle / mitotic G1 DNA damage checkpoint signaling / positive regulation of gluconeogenesis / cellular response to nitric oxide / telomere maintenance / post-translational protein modification / cyclin binding / regulation of mitotic cell cycle / male germ cell nucleus / positive regulation of DNA replication / Recognition of DNA damage by PCNA-containing replication complex / meiotic cell cycle / DNA Damage Recognition in GG-NER / nucleotide-excision repair / positive regulation of protein-containing complex assembly / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / CDK-mediated phosphorylation and removal of Cdc6 / G1/S transition of mitotic cell cycle / SCF(Skp2)-mediated degradation of p27/p21 / Formation of Incision Complex in GG-NER / regulation of circadian rhythm / DNA Damage/Telomere Stress Induced Senescence / Meiotic recombination / Orc1 removal from chromatin / potassium ion transport / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / Cyclin D associated events in G1 / Wnt signaling pathway / Transcriptional regulation of granulopoiesis / Regulation of TP53 Degradation / positive regulation of protein catabolic process / G2/M transition of mitotic cell cycle / cellular response to UV
Similarity search - Function
Yippee/Mis18/Cereblon / Yippee zinc-binding/DNA-binding /Mis18, centromere assembly / CULT domain / CULT domain profile. / Lon N-terminal domain profile. / Lon protease, N-terminal domain / Lon protease, N-terminal domain superfamily / ATP-dependent protease La (LON) substrate-binding domain / Found in ATP-dependent protease La (LON) / Cyclin, C-terminal domain ...Yippee/Mis18/Cereblon / Yippee zinc-binding/DNA-binding /Mis18, centromere assembly / CULT domain / CULT domain profile. / Lon N-terminal domain profile. / Lon protease, N-terminal domain / Lon protease, N-terminal domain superfamily / ATP-dependent protease La (LON) substrate-binding domain / Found in ATP-dependent protease La (LON) / Cyclin, C-terminal domain / : / Cyclins signature. / Cyclin / Cyclin, C-terminal domain / Cyclin_C / RSE1/DDB1/CPSF1 second beta-propeller / Cleavage/polyadenylation specificity factor, A subunit, C-terminal / Cleavage/polyadenylation specificity factor, A subunit, N-terminal / : / CPSF A subunit region / RSE1/DDB1/CPSF1 first beta-propeller / Cyclin, N-terminal / Cyclin, N-terminal domain / PUA-like superfamily / Cyclin-like / domain present in cyclins, TFIIB and Retinoblastoma / Cyclin-like superfamily / : / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / WD40-repeat-containing domain superfamily / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / WD40/YVTN repeat-like-containing domain superfamily / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily
Similarity search - Domain/homology
G1/S-specific cyclin-E1 / Cyclin-dependent kinase 2 / DNA damage-binding protein 1 / Protein cereblon
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.95 Å
AuthorsKwiatkowski N / Liang T / Sha Z / Collier PN / Yang A / Sathappa M / Paul A / Su L / Zheng X / Aversa R ...Kwiatkowski N / Liang T / Sha Z / Collier PN / Yang A / Sathappa M / Paul A / Su L / Zheng X / Aversa R / Li K / Mehovic R / Breitkopf SB / Chen D / Howarth CL / Yuan K / Jo H / Growney JD / Weiss M / Williams J
Funding support United States, 1 items
OrganizationGrant numberCountry
Other private United States
CitationJournal: Cell Chem Biol / Year: 2025
Title: CDK2 heterobifunctional degraders co-degrade CDK2 and cyclin E resulting in efficacy in CCNE1-amplified and overexpressed cancers.
Authors: Nicholas Kwiatkowski / Tong Liang / Zhe Sha / Philip N Collier / Annan Yang / Murugappan Sathappa / Atanu Paul / Lijing Su / Xiaozhang Zheng / Robert Aversa / Kunhua Li / Revonda Mehovic / ...Authors: Nicholas Kwiatkowski / Tong Liang / Zhe Sha / Philip N Collier / Annan Yang / Murugappan Sathappa / Atanu Paul / Lijing Su / Xiaozhang Zheng / Robert Aversa / Kunhua Li / Revonda Mehovic / Christina Kolodzy / Susanne B Breitkopf / Dapeng Chen / Charles L Howarth / Karen Yuan / Hakryul Jo / Joseph D Growney / Matthew Weiss / Juliet Williams /
Abstract: CCNE1 amplification drives aberrant CDK2-cyclin E1 activity in cancer. Despite activity of CDK2 inhibitors, their therapeutic margins are limited by poor CDK selectivity. We developed a degrader with ...CCNE1 amplification drives aberrant CDK2-cyclin E1 activity in cancer. Despite activity of CDK2 inhibitors, their therapeutic margins are limited by poor CDK selectivity. We developed a degrader with high selectivity for CDK2 over CDK1 that also unexpectedly led to cyclin E1 degradation and potent and complete suppression of RB phosphorylation at concentrations with low CDK2 occupancy and negligible CDK1 degradation. Co-depletion of CDK2 and cyclin E1 also resensitized palbociclib-adapted breast cancer cells to cell cycle blockade. Overall, the improved potency and selectivity of the degrader for CDK2 over small-molecule inhibitors drives antiproliferative activity with greater specificity for CCNE1 cancer cells and RB dependency. Using an orally administered degrader, we demonstrate deep and sustained RB pathway suppression, which is needed to induce stasis in CCNE1 tumors. These results highlight the potential of this modality to target CDK2 potently and selectivity in this biomarker-defined patient population with high unmet need.
History
DepositionAug 7, 2024-
Header (metadata) releaseApr 16, 2025-
Map releaseApr 16, 2025-
UpdateApr 30, 2025-
Current statusApr 30, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_46464.png

Downloads & links

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Map

FileDownload / File: emd_46464.map.gz / Format: CCP4 / Size: 166.4 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 352 pix.
= 369.152 Å		1.05 Å/pix.
x 352 pix.
= 369.152 Å		1.05 Å/pix.
x 352 pix.
= 369.152 Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.04873 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.05
Minimum - Maximum-0.0058383564 - 1.9126251
Average (Standard dev.)0.00087967486 (±0.02214877)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions352352352
Spacing352352352
CellA=B=C: 369.152 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_46464_half_map_1.map
Projections & Slices
AxesZYX

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Density Histograms

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Half map: #1

Fileemd_46464_half_map_2.map
Projections & Slices
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Sample components

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Entire : Cryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4

EntireName: Cryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4
Components
  • Complex: Cryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4
    • Protein or peptide: DNA damage-binding protein 1
    • Protein or peptide: Protein cereblon
    • Protein or peptide: Cyclin-dependent kinase 2
    • Protein or peptide: G1/S-specific cyclin-E1
  • Ligand: ZINC ION
  • Ligand: (3R)-3-(5-{4-[(2-{4-[(8-cyclopentyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino]-3-methylbenzene-1-sulfonyl}-7-azaspiro[3.5]nonan-7-yl)methyl]piperidin-1-yl}-4-fluoro-3-methyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-1-yl)piperidine-2,6-dione

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Supramolecule #1: Cryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4

SupramoleculeName: Cryo-EM structure of CDK2/CyclinE1 in complex with CRBN/DDB1 and Cpd 4
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: DNA damage-binding protein 1

MacromoleculeName: DNA damage-binding protein 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 128.139578 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSYNYVVTAQ KPTAVNGCVT GHFTSAEDLN LLIAKNTRLE IYVVTAEGLR PVKEVGMYGK IAVMELFRPK GESKDLLFIL TAKYNACIL EYKQSGESID IITRAHGNVQ DRIGRPSETG IIGIIDPECR MIGLRLYDGL FKVIPLDRDN KELKAFNIRL E ELHVIDVK ...String:
MSYNYVVTAQ KPTAVNGCVT GHFTSAEDLN LLIAKNTRLE IYVVTAEGLR PVKEVGMYGK IAVMELFRPK GESKDLLFIL TAKYNACIL EYKQSGESID IITRAHGNVQ DRIGRPSETG IIGIIDPECR MIGLRLYDGL FKVIPLDRDN KELKAFNIRL E ELHVIDVK FLYGCQAPTI CFVYQDPQGR HVKTYEVSLR EKEFNKGPWK QENVEAEASM VIAVPEPFGG AIIIGQESIT YH NGDKYLA IAPPIIKQST IVCHNRVDPN GSRYLLGDME GRLFMLLLEK EEQMDGTVTL KDLRVELLGE TSIAECLTYL DNG VVFVGS RLGDSQLVKL NVDSNEQGSY VVAMETFTNL GPIVDMCVVD LERQGQGQLV TCSGAFKEGS LRIIRNGIGI HEHA SIDLP GIKGLWPLRS DPNRETDDTL VLSFVGQTRV LMLNGEEVEE TELMGFVDDQ QTFFCGNVAH QQLIQITSAS VRLVS QEPK ALVSEWKEPQ AKNISVASCN SSQVVVAVGR ALYYLQIHPQ ELRQISHTEM EHEVACLDIT PLGDSNGLSP LCAIGL WTD ISARILKLPS FELLHKEMLG GEIIPRSILM TTFESSHYLL CALGDGALFY FGLNIETGLL SDRKKVTLGT QPTVLRT FR SLSTTNVFAC SDRPTVIYSS NHKLVFSNVN LKEVNYMCPL NSDGYPDSLA LANNSTLTIG TIDEIQKLHI RTVPLYES P RKICYQEVSQ CFGVLSSRIE VQDTSGGTTA LRPSASTQAL SSSVSSSKLF SSSTAPHETS FGEEVEVHNL LIIDQHTFE VLHAHQFLQN EYALSLVSCK LGKDPNTYFI VGTAMVYPEE AEPKQGRIVV FQYSDGKLQT VAEKEVKGAV YSMVEFNGKL LASINSTVR LYEWTTEKEL RTECNHYNNI MALYLKTKGD FILVGDLMRS VLLLAYKPME GNFEEIARDF NPNWMSAVEI L DDDNFLGA ENAFNLFVCQ KDSAATTDEE RQHLQEVGLF HLGEFVNVFC HGSLVMQNLG ETSTPTQGSV LFGTVNGMIG LV TSLSESW YNLLLDMQNR LNKVIKSVGK IEHSFWRSFH TERKTEPATG FIDGDLIESF LDISRPKMQE VVANLQYDDG SGM KREATA DDLIKVVEEL TRIHWSHPQF EK

UniProtKB: DNA damage-binding protein 1

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Macromolecule #2: Protein cereblon

MacromoleculeName: Protein cereblon / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 46.465375 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: GSEAKKPNII NFDTSLPTSH TYLGADMEEF HGRTLHDDDS CQVIPVLPQV MMILIPGQTL PLQLFHPQEV SMVRNLIQKD RTFAVLAYS NVQEREAQFG TTAEIYAYRE EQDFGIEIVK VKAIGRQRFK VLELRTQSDG IQQAKVQILP ECVLPSTMSA V QLESLNKC ...String:
GSEAKKPNII NFDTSLPTSH TYLGADMEEF HGRTLHDDDS CQVIPVLPQV MMILIPGQTL PLQLFHPQEV SMVRNLIQKD RTFAVLAYS NVQEREAQFG TTAEIYAYRE EQDFGIEIVK VKAIGRQRFK VLELRTQSDG IQQAKVQILP ECVLPSTMSA V QLESLNKC QIFPSKPVSR EDQCSYKWWQ KYQKRKFHCA NLTSWPRWLY SLYDAETLMD RIKKQLREWD ENLKDDSLPS NP IDFSYRV AACLPIDDVL RIQLLKIGSA IQRLRCELDI MNKCTSLCCK QCQETEITTK NEIFSLSLCG PMAAYVNPHG YVH ETLTVY KACNLNLIGR PSTEHSWFPG YAWTVAQCKI CASHIGWKFT ATKKDMSPQK FWGLTRSALL PTIPDTEDEI SPDK VILCL

UniProtKB: Protein cereblon

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Macromolecule #3: Cyclin-dependent kinase 2

MacromoleculeName: Cyclin-dependent kinase 2 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: cyclin-dependent kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 34.056469 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MENFQKVEKI GEGTYGVVYK ARNKLTGEVV ALKKIRLDTE TEGVPSTAIR EISLLKELNH PNIVKLLDVI HTENKLYLVF EFLHQDLKK FMDASALTGI PLPLIKSYLF QLLQGLAFCH SHRVLHRDLK PQNLLINTEG AIKLADFGLA RAFGVPVRTY (TPO)HEVVTLWY ...String:
MENFQKVEKI GEGTYGVVYK ARNKLTGEVV ALKKIRLDTE TEGVPSTAIR EISLLKELNH PNIVKLLDVI HTENKLYLVF EFLHQDLKK FMDASALTGI PLPLIKSYLF QLLQGLAFCH SHRVLHRDLK PQNLLINTEG AIKLADFGLA RAFGVPVRTY (TPO)HEVVTLWY RAPEILLGCK YYSTAVDIWS LGCIFAEMVT RRALFPGDSE IDQLFRIFRT LGTPDEVVWP GVTSMPD YK PSFPKWARQD FSKVVPPLDE DGRSLLSQML HYDPNKRISA KAALAHPFFQ DVTKPVPHLR L

UniProtKB: Cyclin-dependent kinase 2

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Macromolecule #4: G1/S-specific cyclin-E1

MacromoleculeName: G1/S-specific cyclin-E1 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 33.140578 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: SGSIIAPSRG SPLPVLSWAN REEVWKIMLN KEKTYLRDQH FLEQHPLLQP KMRAILLDWL MEVCEVYKLH RETFYLAQDF FDRYMATQE NVVKTLLQLI GISSLFIAAK LEEIYPPKLH QFAYVTDGAC SGDEILTMEL MIMKALKWRL SPLTIVSWLN V YMQVAYLN ...String:
SGSIIAPSRG SPLPVLSWAN REEVWKIMLN KEKTYLRDQH FLEQHPLLQP KMRAILLDWL MEVCEVYKLH RETFYLAQDF FDRYMATQE NVVKTLLQLI GISSLFIAAK LEEIYPPKLH QFAYVTDGAC SGDEILTMEL MIMKALKWRL SPLTIVSWLN V YMQVAYLN DLHEVLLPQY PQQIFIQIAE LLDLCVLDVD CLEFPYGILA ASALYHFSSS ELMQKVSGYQ WCDIENCVKW MV PFAMVIR ETGSSKLKHF RGVADEDAHN IQTHRDSLDL LDKARAKKA

UniProtKB: G1/S-specific cyclin-E1

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Macromolecule #5: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 5 / Number of copies: 1 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #6: (3R)-3-(5-{4-[(2-{4-[(8-cyclopentyl-7-oxo-7,8-dihydropyrido[2,3-d...

MacromoleculeName: (3R)-3-(5-{4-[(2-{4-[(8-cyclopentyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino]-3-methylbenzene-1-sulfonyl}-7-azaspiro[3.5]nonan-7-yl)methyl]piperidin-1-yl}-4-fluoro-3-methyl-2-oxo-2,3- ...Name: (3R)-3-(5-{4-[(2-{4-[(8-cyclopentyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino]-3-methylbenzene-1-sulfonyl}-7-azaspiro[3.5]nonan-7-yl)methyl]piperidin-1-yl}-4-fluoro-3-methyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-1-yl)piperidine-2,6-dione
type: ligand / ID: 6 / Number of copies: 1 / Formula: A1A1I
Molecular weightTheoretical: 880.041 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOCONTINUUM (6k x 4k) / Average electron dose: 48.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.95 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.4.1) / Number images used: 537511
Initial angle assignmentType: RANDOM ASSIGNMENT / Software - Name: cryoSPARC (ver. 4.41)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.41)
FSC plot (resolution estimation)

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