ELECTRON MICROSCOPY


Sample

Mouse Mammary Tumor Virus intasome complex

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Sample containing MMTV intasomes in SEC buffer (to which the detergent NP-40 was added to a final concentration of 0.05%) was applied onto a freshly plasma-treated (6s, Gatan Solarus plasma cleaner) holey carbon C-flat grid (CF-1.2/1.3-4C, Protochips, Inc.), allowing the sample to adsorb for 30 seconds and then plunge-freezing in liquid ethane using a manual cryo-plunger in an ambient environment of 4 degrees C.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 30307
Reported Resolution (Å) 4.8
Resolution Method FSC 0.143 CUT-OFF
Other Details Local FSC values range from 4-5 A. (Single particle details: IN-NTD and IN-CCD domains of flanking INs 5-8 were computationally removed using Relion after assignment of Euler angles to full octameric particles and masking out of flanking regions.) (Single particle - Applied symmetry: C2)
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol OTHER
Refinement Target FSC, Rosetta energy
Overall B Value 300
Fitting Procedure ?
Details REFINEMENT PROTOCOL--real-space refinement DETAILS--Initial components solved by X-ray were rigid-body docked. Linker regions were built de novo from the EM density. The full model was refined using real-space methods in Rosetta.
Data Acquisition
Detector Type GATAN K2 (4k x 4k)
Electron Dose (electrons/Å2) 40
Imaging Experiment
Date of Experiment 2015-04-15
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 4000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 22500
Calibrated Magnification 38167
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING Rosetta ?
RECONSTRUCTION FREALIGN ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. each particle
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