ELECTRON MICROSCOPY

Sample

Plasmodium falciparum Chloroquine Resistance Transporter (PfCRT) 7G8 Isoform Complexed with Fab

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument LEICA EM GP
Cryogen Name ETHANE
Sample Vitrification Details Blot for 2 seconds before plunging.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 17030
Reported Resolution (Å) 3.3
Resolution Method FSC 0.143 CUT-OFF
Other Details CisTEM was used to reconstruct the final map using original (non-signal subtracted) particles.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol AB INITIO MODEL
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Rosetta was used to generate an ab initio model for the PfCRT using the map. 4XMM chains H and L were used as starting point to model the Fab.
Data Acquisition
Detector Type GATAN K2 QUANTUM (4k x 4k)
Electron Dose (electrons/Å2) 91.56
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1.2
Maximum Defocus (nm) 1.8
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 0.001
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 215000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION Gautomatch 0.53
IMAGE ACQUISITION Leginon 3.4
CTF CORRECTION RELION 2.1
CTF CORRECTION cisTEM 1
CTF CORRECTION cryoSPARC 2
MODEL FITTING Coot ?
MODEL REFINEMENT PHENIX ?
INITIAL EULER ASSIGNMENT cryoSPARC 2
FINAL EULER ASSIGNMENT cryoSPARC 2
CLASSIFICATION cryoSPARC 2
RECONSTRUCTION cisTEM 1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION CTF was estimated using GCTF and refined throughout the pipeline using cisTEM.
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