4A0O

Symmetry-free cryo-EM map of TRiC in the nucleotide-free (apo) state

ELECTRON MICROSCOPY

Sample
BOVINE TRIC IN THE NUCLEOTIDE FREE STATE

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK I
Cryogen Name	ETHANE
Sample Vitrification Details	LIQUID ETHEN

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	47151
Reported Resolution (Å)	10.5
Resolution Method
Other Details	OUR MODELS DO NOT INCLUDE SOME REGIONS OF THE APICAL DOMAIN IN SEVERAL SUBUNITS, BECAUSE THE MAP IN THOSE REGIONS WAS NOT VERY WELL RESOLVED DUE TO TH ...	OUR MODELS DO NOT INCLUDE SOME REGIONS OF THE APICAL DOMAIN IN SEVERAL SUBUNITS, BECAUSE THE MAP IN THOSE REGIONS WAS NOT VERY WELL RESOLVED DUE TO THE DYNAMIC NATURE OF THOSE SUBUNITS. WE FITTED THE MODEL WITH THE OCCUPANCY REFINEMENT FEATURE IN DIREX. THIS BASICALLY DETERMINES WHETHER THERE IS SUFFICIENT DENSITY FOR EACH RESIDUE OR IF THERE IS REDUCED OR MISSING DENSITY. THE OCCUPANCY IS VALUE BETWEEN 0 AND 1. WE WROTE THIS VALUE INTO THE B-FACTOR COLUMN AS 100X(1-OCCUPANCY). THIS RESEMBLES A B-FACTOR BUT IS NOT EXACTLY THE SAME. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1960. (DEPOSITION ID: 10235).
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Data Acquisition
Detector Type	KODAK SO-163 FILM
Electron Dose (electrons/Å**2)	18

Imaging Experiment	1
Date of Experiment	2008-10-20
Temperature (Kelvin)	101
Microscope Model	JEOL 3200FSC
Minimum Defocus (nm)	1200
Maximum Defocus (nm)	3000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	50000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details	NONE

EM Software
Task	Software Package	Version
MODEL FITTING	DireX

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.