3B8K | pdb_00003b8k

Structure of the Truncated Human Dihydrolipoyl Acetyltransferase (E2)

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1EAA

Sample
human tE2

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	HOMEMADE PLUNGER
Cryogen Name	ETHANE
Sample Vitrification Details	flash freezing in liquid ethane

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	2432
Reported Resolution (Å)	8.8
Resolution Method
Other Details	Orientation determination and 3D reconstruction were performed using the IMIRS software package on multiprocessor MS Windows XP computer workstations. The orientations were first estimated from the particle images in the far-from-focus micrographs and refined to about 30- resolution. These orientation parameters were then further refined using the particles in the close-to-focus micrographs.
Refinement Type
Symmetry Type	POINT
Point Symmetry	I

Map-Model Fitting and Refinement
Id	1 (1EAA)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	best fit using the program CHIMERA
Overall B Value	30
Fitting Procedure
Details	REFINEMENT PROTOCOL--rigid body

Data Acquisition
Detector Type	GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å**2)	12

Imaging Experiment	1
Date of Experiment	2003-10-01
Temperature (Kelvin)	100
Microscope Model	JEOL 2010F
Minimum Defocus (nm)	600
Maximum Defocus (nm)	2100
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	1
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	69250
Calibrated Magnification	69250
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

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

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	CTF correction of each image