4V3A

ELECTRON MICROSCOPY

Sample

PLEUROTOLYSIN PREPORE ON LIPOSOMES (TMH1 LOCK) TRAPPED WITH ENGINEERED DISULPHIDE

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 40 C 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 36 C AND 80 PERCENT HUMIDITY.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 1150
Reported Resolution (Å) 15
Resolution Method ?
Other Details SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2794. (DEPOSITION ID: 12853).
Refinement Type
Symmetry Type POINT
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 GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å2) 25
Imaging Experiment
Date of Experiment 2011-07-01
Temprature (Kelvin)
Microscope Model FEI POLARA 300
Minimum Defocus (nm) 900
Maximum Defocus (nm) 3600
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 TEMPy ?
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