9I37 | pdb_00009i37

Csu pilus rod purified from Acinetobacter baumannii

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	7ZL4

Sample
Csu pilus rod

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

3D Reconstruction
Reconstruction Method	HELICAL
Number of Particles	50502
Reported Resolution (Å)	3.28
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	HELICAL
Axial Symmetry	C1
Axial Rise	27.606
Angular Rotation	-153.984

Map-Model Fitting and Refinement
Id	1 (7ZL4)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target
Overall B Value	72.51
Fitting Procedure
Details	UCSF Chimera was used to fit the subunits into the map and adjust their relative angles, and it was also used to adjust map pixel spacing to match model dimensions. Coot was used to adjust side chain and loop positions. Phenix was used to fit the final version of the model into the stack map.

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	54.8

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	TFS KRIOS
Minimum Defocus (nm)	800
Maximum Defocus (nm)	2500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification	81000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
PARTICLE SELECTION	cryoSPARC	v4.5.3
IMAGE ACQUISITION	Latitude	S
CTF CORRECTION	cryoSPARC	v4.5.3
MODEL FITTING	UCSF Chimera	1.15
MODEL FITTING	Coot	0.8.9.2 EL
RECONSTRUCTION	cryoSPARC	v4.5.3
MODEL REFINEMENT	PHENIX	1.20.1_4487:

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		189846