7AE0 | pdb_00007ae0

Cryo-EM structure of an extracellular contractile injection system in marine bacterium Algoriphagus machipongonensis, the sheath-tube module in extended state.

ELECTRON MICROSCOPY

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Sample
The sheath-tube module of an extracellular contractile injection system in marine bacterium Algoriphagus machipongonensis

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE-PROPANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	HELICAL
Number of Particles	225305
Reported Resolution (Å)	2.4
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	HELICAL
Axial Symmetry	C6
Axial Rise	40.8
Angular Rotation	20.54

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

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	60

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

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