4CKG | pdb_00004ckg

Helical reconstruction of ACAP1(BAR-PH domain) decorated membrane tubules by cryo-electron microscopy

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4NSW

Sample
BAR-PH DOMAIN OF ACAP1

Specimen Preparation
Sample Aggregation State	HELICAL ARRAY
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	LIQUID ETHANE

3D Reconstruction
Reconstruction Method	HELICAL
Number of Particles	367
Reported Resolution (Å)	15
Resolution Method
Other Details	PARTICLES WERE CLASSIFIED BY THEIR DIAMETERS, THEN SHRUNK 4 TIMES TO PERFORM SINGLE PARTICLE RECONSTRUCTION USING IHRSR. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2546. (DEPOSITION ID: 12221).
Refinement Type
Symmetry Type	HELICAL

Map-Model Fitting and Refinement
Id	1 (4NSW)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	Cross-correlation coefficient
Overall B Value
Fitting Procedure
Details	METHOD--RIGID BODY FITTING AND MANUALLY DOCKING REFINEMENT PROTOCOL--X-RAY

Data Acquisition
Detector Type	GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å**2)	20

Imaging Experiment	1
Date of Experiment	2012-07-16
Temperature (Kelvin)	98
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	2500
Maximum Defocus (nm)	3500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.7
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	75000
Calibrated Magnification	125418
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details	GOOD MICROGRAPHS (VERIFIED BY HELICAL DIFFRACTION PATTERN) WERE SELECTED MANUALLY. THE ELECTRON DOSE IS 2000 ELECTRON PER NANOMETER SQUARE.

EM Software
Task	Software Package	Version
MODEL FITTING	UCSF Chimera
RECONSTRUCTION	IHRSR

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	CTFFIND3