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Cryo-EM structure of CRBN bound to 2-[5-chloro-1-(4-piperidyl)indol-4-yl]-2,5-diazaspiro[3.4]octan-6-one in the open conformation


ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 8D81 

Refinement

RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d4.4718
f_angle_d0.679
f_chiral_restr0.0464
f_plane_restr0.0053
f_bond_d0.0031
Sample
Complex of CRL4 E3 adapter-receptor pair DDB1 and CRBN bound to spirocyclic ligand
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles195995
Reported Resolution (Å)2.51
Resolution MethodFSC 0.143 CUT-OFF
Other DetailscryoSPARC non-uniform refinement was used for the final reconstruction of the consensus map, and cryoSPARC local refinement was used for the locally r ...cryoSPARC non-uniform refinement was used for the final reconstruction of the consensus map, and cryoSPARC local refinement was used for the locally refined map of the thalidomide binding domain
Refinement Type
Symmetry TypePOINT
Map-Model Fitting and Refinement
Id1 (8CVP)
Refinement SpaceREAL
Refinement ProtocolFLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
DetailsInitial fitting was done in ChimeraX, followed by flexible fitting in Coot. The model was refined with iterative rounds of building in Coot and refine ...Initial fitting was done in ChimeraX, followed by flexible fitting in Coot. The model was refined with iterative rounds of building in Coot and refinement in PHENIX real space refine
Data Acquisition
Detector TypeTFS FALCON 4i (4k x 4k)
Electron Dose (electrons/Å**2)50
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelTFS KRIOS
Minimum Defocus (nm)800
Maximum Defocus (nm)1800
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONcryoSPARC4.6.2
MODEL FITTINGUCSF ChimeraX1.9
MODEL FITTINGCoot0.9.8.95
INITIAL EULER ASSIGNMENTcryoSPARC4.6.2
FINAL EULER ASSIGNMENTcryoSPARC4.7
RECONSTRUCTIONcryoSPARC4.7
MODEL REFINEMENTPHENIX1.20.1-4487
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTIONPatch CTF