6SJE

Cryo-EM structure of the RecBCD Chi partially-recognised complex


ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 6SJB 

Refinement

RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d17.437
f_angle_d0.579
f_chiral_restr0.094
f_plane_restr0.005
f_bond_d0.003
Sample
RecBCD bound to a forked Chi-containing DNA substrate
Sample Components
RecBCD
forked Chi-containing DNA substrate
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details1s blot before plunging
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles44320
Reported Resolution (Å)4.1
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1 (6SJB)
Refinement SpaceREAL
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
DetailsRounds of manual structure editing in coot and real-space refinement with Phenix
Data Acquisition
Detector TypeGATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)45
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)1300
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 Magnification130000
Calibrated Magnification47755
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONGautomatch
IMAGE ACQUISITIONEPU
CTF CORRECTIONGctf
INITIAL EULER ASSIGNMENTRELION3
FINAL EULER ASSIGNMENTRELION3
CLASSIFICATIONRELION3
RECONSTRUCTIONRELION3
MODEL REFINEMENTPHENIX1.12
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION1053451