REL RCSB RCSB RCSB 2015-04-17 2015-05-20 2015-12-09 2015-12-09 Structure of bacterial chemotaxis signaling CheA2-hexamer core complex by cryo-electron tomography and subvolume averaging Cassidy CK Himes BA Alvarez FJ Ma J Zhou G Perilla JR Schulten K Zhang P Bacterial chemotaxis, Signal transduction, cryo-Electron Tomography, Molecular dynamics simulation, all-atom Cassidy CK Himes BA Alvarez FJ Ma J Zhou G Perilla JR Schulten K Zhang P CryoEM and computer simulations reveal a novel kinase conformational switch in bacterial chemotaxis signaling. eLife 4 e08419 e08419 2015 26583751 doi:10.7554/eLife.08419 tarCF CheA CheW tarCF CheA CheW Hexamer of (CheA dimer, dimer of tarCF trimers of dimers, 2 CheW subunits) 3 3.32 Chemotaxis protein CheA Escherichia coli Inner Membrane 0.071384 12 Dimer true Escherichia coli RP3098 pKJ9 P07363 Chemotaxis protein CheW Escherichia coli Inner Membrane 0.018083 2 monomeric true Escherichia coli RP3098 PPA770 P0A964 Methyl-accepting chemotaxis protein II Escherichia coli Inner Membrane 0.031209
Cytoplasmic fragment of wild-type aspartate receptor
6 trimer of dimers true Escherichia coli RP3098 pHTCF P07017 subtomogramAveraging twoDArray 7.4
75 mM Tris-HCl, 100 mM KCl, 5 mM MgCl2
Perforated R2/2 Quantifoil grids precoated with 10 nm fiducial gold beads on the backside of the grid
 ETHANE HOMEMADE PLUNGER Single-sided blotting to avoid disruption of the monolayer
Pseudo-crystalline 2D monolayer reconstituted on a lipid monolayer
 FEI POLARA 300 SPOT SCAN BRIGHT FIELD FIELD EMISSION GUN 200 2.0 4.0 8.0 39000.0 49834.0 OTHER 2009-01-07 GATAN ULTRASCAN 4000 (4k x 4k) 60 60 16. -70 70
Subtomograms were initially selected using template matching. Positions were refined using alignment to class averages. Classification was also used to select symmetry centers and to remove high variance outliers. Cross-correlation with missing-wedge compensation was used for alignment, with SVD and HAC used for statistical analysis.
OTHER 17.5 OTHER IMOD 400
TomoCTF (strip-based periodogram)
 P 1 emd_6320.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 130 130 64 0 0 0 130 130 64 391.3 391.3 192.64 90.0 90.0 90.0 X Y Z -6.19167137 9.26665974 -0.00508755 1.45572317 3.01 3.01 3.01 1.5 AUTHOR Structure of bacterial chemotaxis signaling CheA2-hexamer core complex by cryo-electron tomography and subvolume averaging
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