8RTB | pdb_00008rtb

Extended inner membrane complex (IMC) protomer structure (TrwM/VirB3-TrwK/VirB4-TrwI/VirB6-TrwG/VirB8-TrwE/VirB10) from the fully-assembled R388 type IV secretion system determined by cryo-EM.

ELECTRON MICROSCOPY

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Refinement

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	26.093
f_angle_d	0.725
f_chiral_restr	0.046
f_plane_restr	0.006
f_bond_d	0.005

Sample
Extended IMC-protomer complex from the fully-assembled R388 type IV secretion system

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	234578
Reported Resolution (Å)	3.83
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT

Map-Model Fitting and Refinement
Id	1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	57.5

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	TFS KRIOS
Minimum Defocus (nm)	1500
Maximum Defocus (nm)	3300
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	OTHER
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.18.2_3874:
RECONSTRUCTION	cryoSPARC

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION