4V2T

ELECTRON MICROSCOPY

Sample

PLEUROTOLYSIN PORE IN LIPOSOMES

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK III
Cryogen Name ETHANE
Sample Vitrification Details VITRIFICATION 1 -- CRYOGEN- ETHANE, HUMIDITY - 80, INSTRUMENT- FEI VITROBOT MARK III, METHOD- PLEUROTOLYSIN A WAS FIRST ADDED TO SPHINGOMYELIN-CHOLESTEROL LIPOSOMES AT A MOLAR RATIO OF 1 TO 2000 PROTEIN TO LIPID IN THE ABOVE BUFFER. AFTER 5 MIN INCUBATION AT ROOM TEMPERATURE, PLEUROTOLYSIN B WAS ADDED TO THE MIXTURE AT A MOLAR RATIO OF 1 TO 2 TO PLEUROTOLYSIN A. THE MIXTURE WAS INCUBATED AT 40C OR ROOM TEMPERATURE FOR 30 MIN AFTER WHICH 3. 5 UL WERE PLACED ON NEGATIVELY GLOW DISCHARGED LACEY GRIDS AND VITRIFIED IN LIQUID ETHANE USING A VITROBOT. BLOTTING WAS CARRIED OUT AT 36C AND 80 PERCENT HUMIDITY.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 8700
Reported Resolution (Å) 11
Resolution Method ?
Other Details SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2793. (DEPOSITION ID: 12292).
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target Cross-correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details METHOD--FLEXIBLE
Data Acquisition
Detector Type GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å2) 25
Imaging Experiment
Date of Experiment 2011-01-19
Temprature (Kelvin)
Microscope Model FEI POLARA 300
Minimum Defocus (nm) 800
Maximum Defocus (nm) 3200
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.3
Imaging Mode BRIGHT FIELD
Specimen Holder Model .
Nominal Magnification 59000
Calibrated Magnification 76148
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING Flex-EM ?
MODEL FITTING MODELLER ?
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION IMAGIC ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
? ESTIMATED WITH CTFFIND3, THEN PHASES FLIPPED FOR EACH PARTICLE