8FAK

DNA replication fork binding triggers structural changes in the PriA DNA helicase that regulate the PriA-PriB replication restart pathway in E. coli


ELECTRON MICROSCOPY
Sample
Complex of PriA, PriB, and replication fork
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles190000
Reported Resolution (Å)3.22
Resolution MethodFSC 0.143 CUT-OFF
Other DetailsHighest resolution used in refinement was 4.4A
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 TypeGATAN K3 (6k x 4k)FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å**2)10060
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)500
Maximum Defocus (nm)2000
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 SELECTIONcisTEM2.0.0
IMAGE ACQUISITIONSerialEM
CTF CORRECTIONcisTEM2.0.0
MODEL FITTINGUCSF Chimera
INITIAL EULER ASSIGNMENTcisTEM2.0.0
FINAL EULER ASSIGNMENTcisTEM2.0.0
RECONSTRUCTIONcisTEM2.0.0
MODEL REFINEMENTPHENIX
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION1500000