ELECTRON MICROSCOPY

Sample

HIV-1 reverse transcriptase with novel inhibitor

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument LEICA EM GP
Cryogen Name ETHANE
Sample Vitrification Details The cryo-EM grids used for single particle collection were Quantifoil R 2/1 300 gold mesh grids with carbon coating. The grids were glow-discharged for 25 s at 25 mA with the chamber pressure set at 0.3 mbar (PELCO easiGlow; Ted Pella). The grids were prepared using the Leica GP2 plunge freezer with its chamber set to 10oC and 95% humidity. Samples of purified HIV-1 RT were diluted to 1mg/mL and 2 molar equivalents of the appropriate compound 12126065 were incubated on a 4oC rotator overnight to combine. A total of 4uL of HIV-1 RT and compound were applied to the backside of the Quantifoil grid and blotted for 4 seconds on the carbon side before plunge frozen in ethane at -181oC.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 175711
Reported Resolution (Å) 3.53
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
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 125
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 50
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 2000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL REFINEMENT PHENIX 1.21.1_5286
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?