6K9Q

Structure of the native supercoiled hook as a universal joint

ELECTRON MICROSCOPY

Sample
Native supercoiled hook

Specimen Preparation
Sample Aggregation State	FILAMENT
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	157334
Reported Resolution (Å)	3.1
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (3A69, 5JXL, 5JXL)
Refinement Space	REAL
Refinement Protocol	FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)	0.87

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	JEOL CRYO ARM 200
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	1.4
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	50000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

EM Software
Task	Software Package	Version
CTF CORRECTION	Gctf	1.06
MODEL FITTING	UCSF Chimera	1.11
MODEL FITTING	Coot	0.8.9
INITIAL EULER ASSIGNMENT	cryoSPARC	2
FINAL EULER ASSIGNMENT	cryoSPARC	2
CLASSIFICATION	cryoSPARC	2
RECONSTRUCTION	cryoSPARC	2
MODEL REFINEMENT	PHENIX	1.13
MODEL REFINEMENT	Coot	0.8.9

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		418814

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.