5M0R

Cryo-EM reconstruction of the maedi-visna virus (MVV) strand transfer complex


ELECTRON MICROSCOPY
Sample
MVV strand transfer complex
Sample Components
intergrase
nucleic acid
nucleic acid
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification DetailsTo lower salt concentration before plunge-freezing, the grids were blotted for 0.5 s, immediately hydrated with a 4-ul drop of 200 mM NaCl, 3 mM CaCl2 ...To lower salt concentration before plunge-freezing, the grids were blotted for 0.5 s, immediately hydrated with a 4-ul drop of 200 mM NaCl, 3 mM CaCl2 and 25 mM BisTris-HCl pH 6.5 and blotted again for 2.5 s followed by plunging into liquid ethane.
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles37021
Reported Resolution (Å)8.2
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC2
Map-Model Fitting and Refinement
Id1
Refinement SpaceREAL
Refinement ProtocolOTHER
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeGATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)1.47
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI POLARA 300
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
PARTICLE SELECTIONRELION1.4
IMAGE ACQUISITIONSerialEM
CTF CORRECTIONCTFFIND4
CTF CORRECTIONRELION1.4
MODEL FITTINGUCSF Chimera
INITIAL EULER ASSIGNMENTRELION1.4
FINAL EULER ASSIGNMENTRELION1.4
RECONSTRUCTIONRELION1.4
MODEL REFINEMENTCoot
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION37021