8AD1

RNA polymerase at U-rich pause bound to RNA putL triple mutant - pause prone, closed clamp state


ELECTRON MICROSCOPY

Refinement

RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d15.5508
f_angle_d1.0039
f_chiral_restr0.0413
f_bond_d0.0283
f_plane_restr0.0035
Sample
Escherichia coli RNA polymerase putL triple mutant complex - pause prone, closed clamp state
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification DetailsQuantifoil UltrAuFoil R1.2/1.3 300 mesh holey gold grids were plasma cleaned on a Model 1070 (Fischione Instruments) for 30 sec at 70% power and with ...Quantifoil UltrAuFoil R1.2/1.3 300 mesh holey gold grids were plasma cleaned on a Model 1070 (Fischione Instruments) for 30 sec at 70% power and with an 80% Argon and 20% Oxygen mixture prior to the application of 0.004 ml of sample. Grids were plunge frozen into liquid ethane using a Vitrobot mark IV (FEI) with 95% chamber humidity at 283K.
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles93293
Reported Resolution (Å)4.1
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Map-Model Fitting and Refinement
Id1 (6ALH)
Refinement SpaceREAL
Refinement ProtocolFLEXIBLE FIT
Refinement Targetmap cross correlation
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeGATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)52
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)800
Maximum Defocus (nm)2500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
IMAGE ACQUISITIONSerialEM
CTF CORRECTIONCTFFIND4
MODEL FITTINGCoot0.9
INITIAL EULER ASSIGNMENTcryoSPARC3.3
FINAL EULER ASSIGNMENTcryoSPARC3.3
CLASSIFICATIONcryoSPARC3.3
RECONSTRUCTIONcryoSPARC3.3
MODEL REFINEMENTPHENIX1.20
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION