REL PDBe PDBe PDBe 2016-03-17 2016-04-13 2016-05-18 2016-05-18 Cryo-electron microscopy structure of the hexagonal pre-attachment T4 baseplate-tail tube complex: locally masked refinement of the upper peripheral baseplate Taylor NMI Guerrero-Ferreira RC Goldie KN Stahlberg H Leiman PG T4, baseplate-tail tube complex, pre-attachment, bacteriophage, bacterial virus, hexagonal, membrane-piercing, cell attachment, infection Taylor NMI Prokhorov NS Guerrero-Ferreira RC Shneider MM Browning C Goldie KN Stahlberg H Leiman PG Atomic structure of bacteriophage T4 baseplate and its function in triggering sheath contraction NATURE 2016 doi:10.1038/nature17971 Hexagonal pre-attachment T4 baseplate-tail tube complex Hexagonal pre-attachment T4 baseplate-tail tube complex
In addition to hexagonal pre-attachment baseplate-tail tube complexes, the sample also contained some star-shaped, hubless post-attachment baseplates. The current reconstruction is the localized reconstruction of the upper peripheral baseplate region of the hexagonal pre-attachment baseplate-tail tube complex.
(gp3)6(gp5)3(gp5.4)1(gp6)12(gp7)6(gp8)12(gp9)18(gp10)18(gp11)18(gp12)18(gp19)126(gp25)6(gp27)3(gp29)X(gp48)6(gp53)6(gp54)6 1 8.7 Hexagonal pre-attachment T4 baseplate-tail tube complex Enterobacteria phage T4 am18/am23 mutant 8.7 1 false singleParticle particle 1 8.0
50 mM Tris-HCl pH 8.0, 100 mM NaCl, 8 mM MgSO4
Quantifoil 300 mesh carbon-coated copper grids glow-discharged for 20 seconds
 ETHANE 100 FEI VITROBOT MARK IV Applied 3.5 ul of sample and blotting 3 seconds before plunging FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.7 0.5 4.0 105000.0 37700.0 FEI TITAN KRIOS AUTOGRID HOLDER 80 The astigmatism was corrected at high magnification Quantum-LS Gatan Image Filter 0.0 20.0 2015-05-07 GATAN K2 SUMMIT (4k x 4k) 1621 60
Individual frames were aligned with 2dx_automator. 40 frames were recorded in total, and the 2 first frames were discarded.
32.
The particles were selected with e2boxer.py.
Each particle
 C6 OTHER 4.55 OTHER RELION
Only the baseplate and the proximal part of the tail tube were selected for 3D reconstruction. The total mass of the reconstructed volume was approximately 6.5 MDa. Then, we performed locally masked refinement of the upper peripheral baseplate region.
37913 emd_3394.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 480 480 480 0 0 0 480 480 480 636.48 636.48 636.48 90.0 90.0 90.0 X Y Z -0.02709264 0.08065169 0.00011014 0.00184489 1.326 1.326 1.326 0.0296 AUTHOR Cryo-electron microscopy structure of the upper peripheral baseplate region of the hexagonal pre-attachment T4 baseplate-tail tube complex. Post-processed with RELION.The map is slightly offset with respect to the complete reconstruction of the hexagonal pre-attachment baseplate.
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emd_3394_fsc.xml