9I2G | pdb_00009i2g

Cryo-EM structure of retron Eco2 (Ec67) in presence of Mg ions


ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
in silico modelAlphaFold 
experimental modelOtherD_1292144007 

Refinement

RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d20.595
f_angle_d0.517
f_chiral_restr0.038
f_plane_restr0.004
f_bond_d0.003
Sample
Ternary complex of retron Eco2 (Ec67) with RNA and DNA in presence of Mg ions
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles1017678
Reported Resolution (Å)3
Resolution MethodFSC 0.143 CUT-OFF
Other Detailssymmetry expanded particles used for the final model.
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeFEI FALCON III (4k x 4k)
Electron Dose (electrons/Å**2)30.31
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelTFS GLACIOS
Minimum Defocus (nm)1000
Maximum Defocus (nm)2000
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 Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONcryoSPARC4.6
MODEL REFINEMENTPHENIX1.21.2_5419
IMAGE ACQUISITIONEPU3.10
RECONSTRUCTIONcryoSPARC4.6
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION544986