6PB4

The E. coli class-II CAP-dependent transcription activation complex with de novo RNA transcript at the state 2


ELECTRON MICROSCOPY
Sample
The E. coli class-II CAP-dependent transcription activation complex with de novo RNA transcript at the state 2
Sample Components
DNA-directed RNA polymerase subunit alpha, DNA-directed RNA polymerase subunit beta, DNA-directed RNA polymerase subunit beta', DNA-directed RNA polymerase subunit omega, RNA polymerase sigma factor RpoD, cAMP-activated global transcriptional regulator CRP
DNA/RNA
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Detailsblot for 3 seconds before plunging
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles33455
Reported Resolution (Å)4.35
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
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)36
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)800
Maximum Defocus (nm)2600
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification96000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging DetailsDirect alignments: Beam tilt pivot points, Beam shift, Comma Free. C2 aperture centering, C2 lens astigmatism correction. Objective aperture centering and objective lens astigmatism correction.
EM Software
TaskSoftware PackageVersion
IMAGE ACQUISITIONEPU
CLASSIFICATIONcisTEM
RECONSTRUCTIONcisTEM
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
NONE