6REY

Human 20S-PA200 Proteasome Complex


ELECTRON MICROSCOPY
Sample
Human 20S-PA200 Proteasome complex
Sample Components
20S Proteasome
PA200 activator
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles20351
Reported Resolution (Å)3
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC2
Map-Model Fitting and Refinement
Id1 (5LE5)2
Refinement SpaceREAL
Refinement ProtocolFLEXIBLE FITAB INITIO MODEL
Refinement Target
Overall B Value
Fitting Procedure
DetailsThe model of the human recombinant 20S proteasome was built based on PDB: 5LE5 using real-space refinement in Coot and Phenixthe model for the human PA200 derived from Phyre2 and I-Tasser. These PA200 models were used as initial guides for the assignment of secondary struct ...the model for the human PA200 derived from Phyre2 and I-Tasser. These PA200 models were used as initial guides for the assignment of secondary structure using real-space refinement in Coot and Phenix, followed by correction of the sequence register using the amino acid side chain densities clearly resolved in our cryo-EM map. Connecting loops and all other regions were built ab initio from the cryo-EM density.
Data Acquisition
Detector TypeFEI FALCON III (4k x 4k)
Electron Dose (electrons/Å**2)45.7
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification95000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
IMAGE ACQUISITIONEPU
CTF CORRECTIONcisTEM1.0.0
MODEL FITTINGCoot
MODEL REFINEMENTPHENIX
MODEL REFINEMENTCoot
INITIAL EULER ASSIGNMENTcisTEM1.0.0.
FINAL EULER ASSIGNMENTcisTEM1.0.0.
RECONSTRUCTIONcisTEM1.0.0.
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION29434