8GLV | pdb_00008glv

96-nm repeat unit of doublet microtubules from Chlamydomonas reinhardtii flagella

ELECTRON MICROSCOPY

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Sample
96-nm repeat unit of doublet microtubules from the flagella of Chlamydomonas reinhardtii

Specimen Preparation
Sample Aggregation State	FILAMENT
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	2.5 microliters of splayed axoneme sample at 16-26 mg/mL were applied to glow-discharged C-Flat 1.2/1.3-4Cu grids at 100% humidity. The samples were then incubated 10 s, blotted for 10 s, and plunged into liquid ethane

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	261585
Reported Resolution (Å)	3.1
Resolution Method	FSC 0.143 CUT-OFF
Other Details	Map resolution varies from 3.1 to 16.7 A.
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 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å**2)	61

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	TFS KRIOS
Minimum Defocus (nm)	500
Maximum Defocus (nm)	2000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	64000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
PARTICLE SELECTION	RELION	3.1.1
IMAGE ACQUISITION	SerialEM	3.6
CTF CORRECTION	CTFFIND	4
MODEL FITTING	Coot	0.9.4.1
MODEL FITTING	UCSF ChimeraX	1.3
INITIAL EULER ASSIGNMENT	RELION	3.1.1
FINAL EULER ASSIGNMENT	RELION	3.1.1
MODEL REFINEMENT	PHENIX	1.19.2-4158

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		8546747	Particles were manually picked as start/end coordinates.