REL PDBe PDBe PDBe 2012-10-15 2012-10-24 2012-12-12 2012-12-19 GroEL at sub-nanometer resolution by Constrained Single Particle Tomography Bartesaghi A Lecumberry F Sapiro G Subramaniam S Bartesaghi A Lecumberry F Sapiro G Subramaniam S Protein secondary structure determination by constrained single-particle cryo-electron tomography. STRUCTURE 20 2003 2013 2012 23217682 doi:10.1016/j.str.2012.10.016 2ynj FULLOVERLAP GroEL GroEL 14-mer 1 0.8 GroEL Escherichia coli UTI89 0.8 1 14-mer true Escherichia coli subtomogramAveraging particle 3 7.5
100 mM Hepes, pH 7.5, 10 mM Mg(OAc)2, 10 mM KOAc, 2 mM DTT
400 mesh C-flat, 2um hole size (CF/2/2 grids), plasma cleaned for 6s with a Gatan Solarus plasma cleaner.
 ETHANE 100 93 FEI VITROBOT MARK IV Blot for 4 seconds before plunging FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 80 2.7 2.0 3.0 47000.0 47000.0 FEI TITAN KRIOS AUTOGRID HOLDER 80 93 80 Astigmatism corrected at 76000x
The total dose of 25 (electrons/square Angstrom) was fractionated evenly across 11 tilted projections taken between 0 and -20 degrees tilt (every 2 degrees).
2011-10-07 GENERIC CCD 1595 25
The 1595 micrographs corresponded to 145 tilt-series each containing 11 projections with tilt-angles between 0 and -20 degrees (every 2-degrees).
16. Nitrogen cooled -20 0
Particles were manually selected in 3D from reconstructed tomograms and their corresponding raw 2D projections extracted for further processing using Constrained Single Particle Tomography. Average number of projections used in the 3D reconstructions: 10000.
OTHER 8.4 FSC 0.5 CUT-OFF FREALIGN
Final map was amplitude corrected with BSOFT's command 'bampweight' using a density map generated from the PDB ID 3e76 coordinates as a reference.
Defocus values were assigned to each particle projection based on the defocus at the untilted plane of each tilt-series and a correction according to the relative height of each particle. to this plane
FREALIGN
 emd_2221.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 180 180 180 -89 -89 -89 180 180 180 313.2 313.2 313.2 90.0 90.0 90.0 X Y Z -1.52058649 3.54873729 0.0 0.28805894 1.74 1.74 1.74 1.64 AUTHOR Reconstruction of GroEL
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 3e76 H RIGID BODY FIT Chimera
Protocol: Rigid body. Coordinates of chain H from 3e76 were fit using D7-symmetric fitting operation in Chimera.
Correlation REAL
emd_2221.png