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 9GZO | pdb_00009gzo

Cryo-EM structure of the human mitochondrial RNA polymerase transcription initiation complex (POLRMT/TFB2M/DNA/RNA) without TFAM; and with a slipped 3-mer RNA, pppGpGpA (slipped IC3-TFAM)


ELECTRON MICROSCOPY
Sample
Cryo-EM structure of the human mitochondrial RNA polymerase transcription initiation complex (POLRMT/TFB2M/DNA/RNA) without TFAM; and with a slipped 3-mer RNA, pppGpGpA (slipped IC3-TFAM)
Sample Components
DNA-directed RNA polymerase, mitochondrial
DNA (56-mer)
Dimethyladenosine transferase 2, mitochondrial
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentLEICA PLUNGER
Cryogen NameETHANE
Sample Vitrification Detailsincubated on the grid for 10 seconds prior to back-blotting for 12 seconds
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles277033
Reported Resolution (Å)3.15
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1
Refinement Space
Refinement ProtocolFLEXIBLE FIT
Refinement Target
Overall B Value72
Fitting Procedure
Details
Data Acquisition
Detector TypeFEI FALCON III (4k x 4k)
Electron Dose (electrons/Å**2)40
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelTFS GLACIOS
Minimum Defocus (nm)600
Maximum Defocus (nm)1800
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelOTHER
Nominal Magnification150000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)200
Imaging Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONRELION
IMAGE ACQUISITIONEPU2.9.0
RECONSTRUCTIONCoot
MODEL REFINEMENTPHENIX1.19.2_4158
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
NONE