6D6Q

Human nuclear exosome-MTR4 RNA complex - overall reconstruction


ELECTRON MICROSCOPY
Sample
Human nuclear exosome-MTR4 helicase captured after unwinding a DNA/RNA substrate
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details30 sec wait time, 2.5 sec blot time
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles122703
Reported Resolution (Å)3.45
Resolution MethodFSC 0.143 CUT-OFF
Other DetailsFocused refinements with five strategies required to achieve final model
Refinement Type
Symmetry TypePOINT
Map-Model Fitting and Refinement
Id1
Refinement SpaceREAL
Refinement ProtocolBACKBONE TRACE
Refinement TargetCorrelation coefficient
Overall B Value73.6
Fitting Procedure
DetailsModels were rebuilt manually using Coot, with real space refinement with local scaling followed by Phenix real space refinement with suboptimal global ...Models were rebuilt manually using Coot, with real space refinement with local scaling followed by Phenix real space refinement with suboptimal global scaling.
Data Acquisition
Detector TypeGATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)85.23
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
IMAGE ACQUISITIONLeginon3.2
CTF CORRECTIONGctf1.06
CTF CORRECTIONRELION2.1.b1
MODEL FITTINGPHENIX1.13-2998
MODEL REFINEMENTPHENIX1.13-2998
INITIAL EULER ASSIGNMENTcryoSPARC0.6.1
FINAL EULER ASSIGNMENTRELION2.1b1
CLASSIFICATIONRELION2.1b1
RECONSTRUCTIONRELION2.1b1
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION278185