8UZ1

Straight actin filament from Arp2/3 branch junction sample (ADP-BeFx)


ELECTRON MICROSCOPY
Sample
Arp2/3 branch complex (ADP-BeFx state)
Sample Components
Arp2/3 complex
Actin
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification DetailsThe samples were incubated on the grid for 50 s and the extra solution was blotted using two Vitrobot filter papers (0.55/20 mm, Grade 595, Ted Pella) ...The samples were incubated on the grid for 50 s and the extra solution was blotted using two Vitrobot filter papers (0.55/20 mm, Grade 595, Ted Pella) for 4 s at 0 blot force. The grids were plunged into liquid ethane at ~180 degrees C with a wait time of 0.5 s.
3D Reconstruction
Reconstruction MethodHELICAL
Number of Particles543085
Reported Resolution (Å)3.6
Resolution MethodFSC 0.143 CUT-OFF
Other DetailsFor the final 3D reconstruction, no helical symmetry was applied
Refinement Type
Symmetry TypeHELICAL
Axial SymmetryC1
Axial Rise27.38
Angular Rotation-166.74
Map-Model Fitting and Refinement
Id1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeGATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)51.4
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)1200
Maximum Defocus (nm)2500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification64000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging DetailsThe vitrified grids were screened for sample homogeneity and ice thickness in a Glacios 200 kV transmission electron microscope equipped with Gatan K2 summit camera. Electron micrographs for image reconstructions were collected using Titan Krios equipped with X-cold field emission gun at 300 kV, Gatan image filter with slit width of 20 eV and a nanoprobe.
EM Software
TaskSoftware PackageVersion
IMAGE ACQUISITIONSerialEM
FINAL EULER ASSIGNMENTcryoSPARC3.0
CLASSIFICATIONcryoSPARC3.0
RECONSTRUCTIONcryoSPARC3.0
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION1611831