7YMT

Cryo-EM structure of MERS-CoV spike protein, Two RBD-up conformation 2

ELECTRON MICROSCOPY

Sample
recombinant MERS-CoV (betacoronavirus 2c EMC 2012) fm2P Spike

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	blot for 2.5 seconds before plunging; blot force: -1; waiting time: 30s.

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	17461
Reported Resolution (Å)	6.55
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	RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å**2)	40.6

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TALOS ARCTICA
Minimum Defocus (nm)	1500
Maximum Defocus (nm)	1700
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	92000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

EM Software
Task	Software Package	Version
CTF CORRECTION	cryoSPARC	3.2
INITIAL EULER ASSIGNMENT	cryoSPARC	3.2
FINAL EULER ASSIGNMENT	cryoSPARC	3.2
CLASSIFICATION	cryoSPARC	3.2
RECONSTRUCTION	cryoSPARC	3.2

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		1679870

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.