REL PDBe PDBe PDBe 2014-01-07 2014-02-05 2014-03-12 2014-04-09 Electron cryo-microscopy of the PTC3 holotoxin complex (TcdA1, TcdB2, TccC3) in prepore state Gatsogiannis C Meusch D Efremov RG Lang AE Hofnagel O Vetter IR Aktories K Raunser S Photorabdus, Tc toxin, ABC toxin, cargo-delivery Meusch D Gatsogiannis C Efremov RG Lang AE Hofnagel O Vetter IR Aktories K Raunser S Mechanism of Tc toxin action revealed in molecular detail NATURE 508 61 65 2014 24572368 doi:10.1038/nature13015 PTC3 (TcdA1, TcdB2, TccC3) PTC3 (TcdA1, TcdB2, TccC3) TcdB2/TccC3 bind to one homopentamer of TcdA1 3 1.68 1.68 TcdA1 Photorhabdus luminescens 0.283 0.283 1 Pentamer true Escherichia coli Q9RN43 TccC3 Photorhabdus luminescens 0.109 1 Monomer true Escherichia coli Q7N7Y4 TcdB2 Photorhabdus luminescens 0.166 0.166 1 Monomer true Escherichia coli Q7N7Y2 singleParticle particle 0.02 5.0
50 mM MES, 100 mM NaCl, 0.05% Tween-20, 5% glycerol
C-Flat 2/1-4C copper 400 mesh, with additional thin carbon support
 ETHANE 90 100 GATAN CRYOPLUNGE 3 Blot for 1 sec before plunging JEOL 3200FSC FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 200 4.1 0.0004 0.0032 60000.0 124472.0 JEOL 3200FSC CRYOHOLDER in-column Omega filter 0.0 15.0 2012-11-19 TVIPS TEMCAM-F816 (8k x 8k) 1250 20
Partial-symmetry projection matching approach (after each refinement round, C5 symmetry was applied for the TcdA1 component).
Each particle
 C1 OTHER 9.0 OTHER Sparx
TcdA1 component of the complex has an average resolution of 7.4 A, whereas the TcdB2/TccC3 components an average resolution of 11 A. Local resolution calculations were performed using a 20 A sphere for windowed-FSC calculations at 0.5.
43000 emd_2551.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 512 512 512 -256 -256 -256 512 512 512 640.0 640.0 640.0 90.0 90.0 90.0 X Y Z -0.56139374 2.12666035 0.00626538 0.06813836 1.25 1.25 1.25 0.31 AUTHOR PTC3 Holotoxin Complex
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 4O9X RIGID BODY FIT Chimera REAL 4O9Y RIGID BODY FIT REAL
emd_2551.png