3J9R

Atomic structures of a bactericidal contractile nanotube in its pre- and post-contraction states

ELECTRON MICROSCOPY

Sample
Pyocin (post-contraction) sheath

Specimen Preparation
Sample Aggregation State	FILAMENT
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	Blot for 4 seconds (blot force 1) before plunging into liquid ethane (FEI VITROBOT MARK IV).

3D Reconstruction
Reconstruction Method	HELICAL
Number of Particles
Reported Resolution (Å)	3.9
Resolution Method	OTHER
Other Details	Model-Map FSC (Helical Details: Relion-based IHRSR)
Refinement Type
Symmetry Type	HELICAL
Axial Symmetry	C6
Axial Rise	16.2
Angular Rotation	33.1

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

Data Acquisition
Detector Type	KODAK SO-163 FILM
Electron Dose (electrons/Å**2)	25

Imaging Experiment	1
Date of Experiment	2009-10-07
Temperature (Kelvin)	80
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	1600
Maximum Defocus (nm)	2500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.7
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification	59000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details	Scanned with 9200 ED

EM Software
Task	Software Package	Version
RECONSTRUCTION	IHRSR
RECONSTRUCTION	RELION

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	Each particle

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 R01GM157729.