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 7TPT | pdb_00007tpt

Single-particle Cryo-EM structure of Arp2/3 complex at branched-actin junction.


ELECTRON MICROSCOPY
Sample
Complex consisting of Arp2/3 complex-mediated branched actin junction
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentHOMEMADE PLUNGER
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles127093
Reported Resolution (Å)3.9
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1
Refinement SpaceREAL
Refinement ProtocolFLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeFEI FALCON III (4k x 4k)
Electron Dose (electrons/Å**2)41.97
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TALOS ARCTICA
Minimum Defocus (nm)800
Maximum Defocus (nm)1200
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification92000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)200
Imaging DetailsData were collected by shifting of stage to targeted exposure position. Stage was tilted to different angles: including 40 degree, 36 degree, 30 degree, 25 degree, 15 degree, 0 degree, -20 degree, and -33 degree during data collection.
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONcryoSPARCversion 2
IMAGE ACQUISITIONEPU2.1
CTF CORRECTIONcryoSPARCversion 2
MODEL FITTINGNAMD
MODEL FITTINGCoot
MODEL FITTINGUCSF Chimera
FINAL EULER ASSIGNMENTcryoSPARCVersion 2
RECONSTRUCTIONcryoSPARCversion 2
MODEL REFINEMENTPHENIX
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTIONParticles were CTF-corrected during projection matching and back projection2290562