☰ Navigation Tabs
Cryo-electron Tomography and All-atom Molecular Dynamics Simulations Reveal a Novel Kinase Conformational Switch in Bacterial Chemotaxis Signaling
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1QU7
Sample CheA2-trimer core complex Sample Components Chemotaxis protein CheA Chemotaxis protein CheW Methyl-accepting chemotaxis protein II
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument HOMEMADE PLUNGER Cryogen Name ETHANE Sample Vitrification Details Single-sided blotting (to avoid disruption of the monolayer) before plunging into liquid ethane
3D Reconstruction Reconstruction Method TOMOGRAPHY Number of Particles 4000 Reported Resolution (Å) 12.7 Resolution Method FSC 0.143 CUT-OFF Other Details Gold-standard refinement Refinement Type HALF-MAPS REFINED INDEPENDENTLY Symmetry Type 2D CRYSTAL Point Symmetry C2
Map-Model Fitting and Refinement Id 1 (1QU7) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details REFINEMENT PROTOCOL--FLEXIBLE
Data Acquisition Detector Type GATAN ULTRASCAN 4000 (4k x 4k) Electron Dose (electrons/Å**2) 60
Imaging Experiment 1 Date of Experiment 2009-01-07 Temperature (Kelvin) Microscope Model FEI POLARA 300 Minimum Defocus (nm) 4000 Maximum Defocus (nm) 8000 Minimum Tilt Angle (degrees) -70 Maximum Tilt Angle (degrees) 70 Nominal CS 2 Imaging Mode BRIGHT FIELD Specimen Holder Model OTHER Nominal Magnification 39000 Calibrated Magnification 49834 Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details TomoCTF (strip-based periodogram)