ELECTRON MICROSCOPY

Sample

Metavinculin tail domain bound to F-actin

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument LEICA EM GP
Cryogen Name ETHANE
Sample Vitrification Details 3 microliters of 0.3 micromolar actin was applied to the grid and incubated for 60 seconds at 25 degrees C. 3 microliters of 10 micromolar MVt was then applied and incubated for 60 seconds. 3 microliters of solution was removed, then an additional 3 microliters of MVt applied. After 60 seconds, 3 microliters of solution was removed, then the grid was blotted for 2 seconds before plunging into liquid ethane (LEICA EM GP).
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles ?
Reported Resolution (Å) 8.2
Resolution Method FSC 0.143 CUT-OFF
Other Details (Helical Details: Multi-model IHRSR was performed using EMAN2 / SPARX to select for bound segments, followed by single model IHRSR with EMAN2 / SPARX and final reconstruction with FREALIGN (fixed helical parameters).)
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details REFINEMENT PROTOCOL--flexible DETAILS--Components were initially rigid body fit using Chimera, followed by flexible fitting with MDFF.
Data Acquisition
Detector Type GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å2) 25
Imaging Experiment
Date of Experiment 2014-10-10
Temprature (Kelvin)
Microscope Model FEI TECNAI 20
Minimum Defocus (nm) 1500
Maximum Defocus (nm) 3000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model GATAN LIQUID NITROGEN
Nominal Magnification 100000
Calibrated Magnification 137615
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 120
Imaging Details ?
Imaging Experiment
Task Software Package Version
CTF CORRECTION CTFFIND 3
MODEL FITTING MDFF ?
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION EMAN 2
RECONSTRUCTION FREALIGN ?
RECONSTRUCTION SPARX ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. FREALIGN (per segment)