ELECTRON MICROSCOPY

Sample

AZOSPIRILLUM BRASILENSE GLUTAMATE SYNTHASE

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details NLIQUID ETHANE
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 12800
Reported Resolution (Å) 9.5
Resolution Method ?
Other Details THE CHAINS A,B,C,D,E,F OF THE COMPLEX CORRESPOND TO THE ALPHA SUBUNITS, SOLVED BY X-RAY (PDB CODE 1EA0). THREE DISORDERED REGIONS OF THIS X-RAY STRUCTURE (CHAINS A,B,C,D,E, F), IE RESIDUES 305-307, 1172-1179 AND 1194-1202 WERE MODELLED WITH MODELLER. THE CHAINS G,H,I,J,K,L CORRESPOND TO THE HOMOLOGY MODEL OF THE BETA SUBUNIT (GENERATED BY MODELLER).
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details METHOD--REAL-SPACE LOCAL OPTIMIZATION REFINEMENT PROTOCOL--X-RAY AND HOMOLOGY MODELLING
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 10
Imaging Experiment
Date of Experiment 2005-05-10
Temprature (Kelvin)
Microscope Model JEOL 2010UHR
Minimum Defocus (nm) 1700
Maximum Defocus (nm) 3200
Minimum Tilt Angle (degrees) 0
Maximum Tilt Angle (degrees) 0
Nominal CS 0.5
Imaging Mode BRIGHT FIELD
Specimen Holder Model .
Nominal Magnification 50000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details CC =1.1 MM, FOCAL -LEN-1.9 M. MICROGRAPH WITH ANISOTROPIC OR NO DIFFRACTION RINGS WERE REMOVED USING THE ENHANCED POWER SPECTRA SORTING METHOD (JONIC S,SORZANO CO,COTTEVIEILLE M, LARQUET E, BOISSET N.,A NOVEL METHOD FOR IMPROVEMENT OF VISUALIZATION OF POWER SPECTRA FOR SORTING CRYO-ELECTRON MICROGRAPHS AND THEIR LOCAL AREAS. J STRUCT BIOL. 2007, 157(1),156-67.)
Imaging Experiment
Task Software Package Version
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
? WIENER FILTERING OF VOLUMES FROM FOCAL SERIES