7QWP

CryoEM structure of bacterial transcription close complex (RPc)


ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 5NSR 
Sample
Cryo-EM structure of RNA polymerase-sigma54 holo enzyme with promoter DNA closed complex
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles31394
Reported Resolution (Å)3.4
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1 (5NSR)
Refinement SpaceRECIPROCAL
Refinement ProtocolRIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeGATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)50
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)1400
Maximum Defocus (nm)2600
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification81000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
CTF CORRECTIONGctfGCTF_v1.18_sm30-75_cu10.1
MODEL FITTINGUCSF Chimerachimera/1.13.1
MODEL FITTINGCootCoot/0.8.9.2
INITIAL EULER ASSIGNMENTRELIONRelion3.1
FINAL EULER ASSIGNMENTRELIONRelion3.1
RECONSTRUCTIONRELIONRelion3.1
MODEL REFINEMENTPHENIXphenix/1.13-2998
MODEL REFINEMENTREFMACccp4/7.0 software package
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION2200000