8TWI

Cryo-EM structure of the PP2A:B55-FAM122A complex, PP2Ac body


ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 3DW8 
in silico modelAlphaFoldQ96E09 
Sample
Quadruple complex of PP2A:B55 (PP2Aa:PP2Ac:B55) bound to FAM122A
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles103522
Reported Resolution (Å)2.69
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Map-Model Fitting and Refinement
Id1 (3DW8)
Refinement SpaceREAL
Refinement ProtocolFLEXIBLE FIT
Refinement TargetCross-correlation
Overall B Value
Fitting Procedure
DetailsIterating between manual refinement in Coot and automated real-space refinement in Phenix
Data Acquisition
Detector TypeGATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å**2)70
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)700
Maximum Defocus (nm)1900
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification81000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONRELION4.0
PARTICLE SELECTIONTopaz0.2.5
IMAGE ACQUISITIONEPU3.0
CTF CORRECTIONCTFFIND4.1.14
CTF CORRECTIONRELION4.0
MODEL FITTINGUCSF ChimeraX1.4
MODEL REFINEMENTPHENIX1.20.1-4487
MODEL REFINEMENTCoot0.9
INITIAL EULER ASSIGNMENTRELION4.0
FINAL EULER ASSIGNMENTRELION4.0
RECONSTRUCTIONRELION4.0
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION1248538