ELECTRON MICROSCOPY

Sample

RESPIRATORY SUPERCOMPLEX B (I1III2IV1) COMPOSED OF COMPLEX I, DIMERIC COMPLEX III AND COMPLEX IV FROM BOVINE HEART MITOCHONDRIA

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details VITRIFICATION 1 -- CRYOGEN- ETHANE, HUMIDITY- 70, TEMPERATURE- 95, INSTRUMENT- CUSTOM-MADE HAND PLUNGER, METHOD- ONE- SIDED BLOTTING FOR 26 - 30 SECONDS BEFORE PLUNGING, DETAILS- SAMPLE WAS ADSORBED TO CARBON FILM FOR 30 SECONDS BEFORE BLOTTING
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 10684
Reported Resolution (Å) 19
Resolution Method ?
Other Details FINAL MAP WAS CALCULATED WITH SIRT FROM COMBINED TILTED AND UNTILTED DATASETS WITH 10684 PARTICLES EACH AND OMITTING 30 PER CENT OF IMAGES WITH LOWEST CROSS CORRELATION. THIS ENTRY IS BASED ON PDBS 3IAM,3M9C,1PP9,1BGY,1OCC AND 2B4Z WHICH WERE FITTED MANUALLY INTO THE EM DENSITY MAP OF BOVINE SUPERCOMPLEX I1III2IV1. THE POSITION OF 2B4Z WAS INFERRED FROM PDB 3CX5. THE CHAIN NAMES ARE CASE SENSITIVE. CHAINS A-K AND a-k DENOTE IDENTICAL CHAINS WITHIN A DIMER. CHAINS L-X AND M-P BELONG TO DIFFERENT PROTEINS. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1876.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details METHOD--RIGID BODY REFINEMENT PROTOCOL--X-RAY
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 25
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TECNAI F30
Minimum Defocus (nm) 500
Maximum Defocus (nm) 6000
Minimum Tilt Angle (degrees) -50
Maximum Tilt Angle (degrees) 0
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model .
Nominal Magnification 59000
Calibrated Magnification 58829
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details LOW DOSE CONDITIONS. FOR RANDOM CONICAL TILT EACH AREA WAS IMAGED TWICE WITH THE FIRST IMAGE TAKEN AT A TILT ANGLE OF -45 OR -50 DEGREE
Imaging Experiment
Task Software Package Version
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION IMAGIC ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
? PHASE-FLIPPPING ON EACH PARTICLE