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Reconstruction of TRPV1 ion channel in complex with capsaicin by single particle cryo-microscopy
ELECTRON MICROSCOPY
Sample
Rat TRPV1 in complex with capsaicin
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
FEI VITROBOT MARK III
Cryogen Name
ETHANE
Sample Vitrification Details
Blot for 6 seconds before plunging into liquid ethane (FEI VITROBOT MARK III)
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
33238
Reported Resolution (Å)
4.2
Resolution Method
FSC 0.143 CUT-OFF
Other Details
The entire ankyrin structure was fitted as a single rigid body. As a result, the first two ankyrin repeats (UNP residues 111-199) are included but ar ...
The entire ankyrin structure was fitted as a single rigid body. As a result, the first two ankyrin repeats (UNP residues 111-199) are included but are not well defined by the experimental density. (Single particle details: 3D classification, refinement, and reconstruction were performed using RELION) (Single particle--Applied symmetry: C4)
Refinement Type
HALF-MAPS REFINED INDEPENDENTLY
Symmetry Type
POINT
Point Symmetry
C4
Map-Model Fitting and Refinement
Id
1
Refinement Space
REAL
Refinement Protocol
AB INITIO MODEL
Refinement Target
Overall B Value
Fitting Procedure
Details
REFINEMENT PROTOCOL--de novo model building DETAILS--The entire ankyrin
structure was fitted as a single rigid body. As a result, the first two ankyr ...
REFINEMENT PROTOCOL--de novo model building DETAILS--The entire ankyrin
structure was fitted as a single rigid body. As a result, the first two ankyrin
repeats (UNP residues 111-199) are included but are not well defined by the
experimental density.
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
21
Imaging Experiment
1
Date of Experiment
2013-01-01
Temperature (Kelvin)
Microscope Model
FEI POLARA 300
Minimum Defocus (nm)
1500
Maximum Defocus (nm)
3000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
2
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
OTHER
Nominal Magnification
31000
Calibrated Magnification
31000
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
Gatan K2 Summit operated in super-resolution counting mode, image recorded with dose fractionation method.