5A42

Cryo-EM single particle 3D reconstruction of the native conformation of E. coli alpha-2-macroglobulin (ECAM)

ELECTRON MICROSCOPY

Sample
NATIVE CONFORMATION OF THE E. COLI ALPHA-2- MACROGLOBULIN (ECAM).

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	LEICA EM CPC
Cryogen Name	ETHANE
Sample Vitrification Details	VITRIFICATION 1 -- CRYOGEN- ETHANE, INSTRUMENT- LEICA EM CPC, METHOD- BLOTTED FOR 1MIN BEFORE PLUNGING WITH 5UL PURIFIED SAMPLE.,

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	46842
Reported Resolution (Å)	16
Resolution Method
Other Details	THE FITTED MODEL IS AN HOMOLOGY MODEL BASED ON A ECAM HOMOLOG FROM SALMONELLA ENTERICA (PDB CODE 4U48) AND THE CRYSTAL STRUCTURES ECAM DOMAINS (PDB CO ...	THE FITTED MODEL IS AN HOMOLOGY MODEL BASED ON A ECAM HOMOLOG FROM SALMONELLA ENTERICA (PDB CODE 4U48) AND THE CRYSTAL STRUCTURES ECAM DOMAINS (PDB CODES 4ZIU,4ZJH,4ZJG,4ZIQ). SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-3016. (DEPOSITION ID: 13326).
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	Cross-correlation coefficient
Overall B Value
Fitting Procedure
Details	METHOD--RIGID BODY

Data Acquisition
Detector Type	FEI EAGLE (4k x 4k)
Electron Dose (electrons/Å**2)

Imaging Experiment	1
Date of Experiment	2014-06-10
Temperature (Kelvin)
Microscope Model	FEI TECNAI 20
Minimum Defocus (nm)	1500
Maximum Defocus (nm)	3500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification	84269
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	UCSF Chimera
RECONSTRUCTION	EMAN	2
RECONSTRUCTION	Xmipp	3

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.