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TitleMolecular glue CELMoD compounds are regulators of cereblon conformation.
Journal, issue, pagesScience, Vol. 378, Issue 6619, Page 549-553, Year 2022
Publish dateNov 4, 2022
AuthorsEdmond R Watson / Scott Novick / Mary E Matyskiela / Philip P Chamberlain / Andres H de la Peña / Jinyi Zhu / Eileen Tran / Patrick R Griffin / Ingrid E Wertz / Gabriel C Lander /
PubMed AbstractCereblon (CRBN) is a ubiquitin ligase (E3) substrate receptor protein co-opted by CRBN E3 ligase modulatory drug (CELMoD) agents that target therapeutically relevant proteins for degradation. Prior ...Cereblon (CRBN) is a ubiquitin ligase (E3) substrate receptor protein co-opted by CRBN E3 ligase modulatory drug (CELMoD) agents that target therapeutically relevant proteins for degradation. Prior crystallographic studies defined the drug-binding site within CRBN's thalidomide-binding domain (TBD), but the allostery of drug-induced neosubstrate binding remains unclear. We performed cryo-electron microscopy analyses of the DNA damage-binding protein 1 (DDB1)-CRBN apo complex and compared these structures with DDB1-CRBN in the presence of CELMoD compounds alone and complexed with neosubstrates. Association of CELMoD compounds to the TBD is necessary and sufficient for triggering CRBN allosteric rearrangement from an open conformation to the canonical closed conformation. The neosubstrate Ikaros only stably associates with the closed CRBN conformation, illustrating the importance of allostery for CELMoD compound efficacy and informing structure-guided design strategies to improve therapeutic efficacy.
External linksScience / PubMed:36378961 / PubMed Central
MethodsEM (single particle)
Resolution3.1 - 3.9 Å
Structure data

EMDB-27012, PDB-8cvp:
Cereblon-DDB1 in the Apo form
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-27234, PDB-8d7u:
Cereblon~DDB1 bound to CC-92480 with DDB1 in the linear conformation
Method: EM (single particle) / Resolution: 3.1 Å

EMDB-27235, PDB-8d7v:
Cereblon~DDB1 bound to CC-92480 with DDB1 in the twisted conformation
Method: EM (single particle) / Resolution: 3.2 Å

EMDB-27236, PDB-8d7w:
Cereblon~DDB1 bound to CC-92480 with DDB1 in the hinged conformation
Method: EM (single particle) / Resolution: 3.1 Å

EMDB-27237, PDB-8d7x:
Cereblon~DDB1 in the Apo form with DDB1 in the hinged conformation
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-27238, PDB-8d7y:
Cereblon-DDB1 in the Apo form with DDB1 in the twisted conformation
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-27239: Cereblon bound to CC-92480, Focused Refinement
Method: EM (single particle) / Resolution: 3.1 Å

EMDB-27240, PDB-8d7z:
Cereblon-DDB1 bound to CC-92480 and Ikaros ZF1-2-3
Method: EM (single particle) / Resolution: 3.1 Å

EMDB-27241, PDB-8d80:
Cereblon~DDB1 bound to Iberdomide and Ikaros ZF1-2-3
Method: EM (single particle) / Resolution: 3.6 Å

EMDB-27242, PDB-8d81:
Cereblon~DDB1 bound to Pomalidomide
Method: EM (single particle) / Resolution: 3.9 Å

Chemicals

ChemComp-ZN:
Unknown entry

ChemComp-QFC:
Mezigdomide

ChemComp-8W7:
(3S)-3-[4-({4-[(morpholin-4-yl)methyl]phenyl}methoxy)-1-oxo-1,3-dihydro-2H-isoindol-2-yl]piperidine-2,6-dione

ChemComp-Y70:
S-Pomalidomide

Source
  • homo sapiens (human)
KeywordsLIGASE / Ubiquitin / CRL4 / Adaptor / Cereblon / E3

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