7Z6V

CRYO-EM STRUCTURE OF SARS-COV-2 SPIKE : H11 nanobody complex


ELECTRON MICROSCOPY
Sample
Complex between Spike and nanobody H11
Sample Components
Spike glycoprotein trimer with fibritin tag
Nanobody H11
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentSPOTITON
Cryogen NameETHANE
Sample Vitrification DetailsSPT Labtech prototype 300 mesh 1.2/2.0 nanowire grids with a highly reproduceable rectangular bar cross-section were used. The grids were glow-dischar ...SPT Labtech prototype 300 mesh 1.2/2.0 nanowire grids with a highly reproduceable rectangular bar cross-section were used. The grids were glow-discharged on low for 120 s (Plasma Cleaner PDC-002-CE, Harrick Plasma) to activate the nanowires. Approximately 6 nL of the complex were applied to the grids using a Chameleon EP system (SPT Labtech) at 82% relative humidity and ambient temperature.
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles432130
Reported Resolution (Å)3.1
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1 (6ZHD, 6ZHD, 6ZHD)
Refinement SpaceRECIPROCAL
Refinement ProtocolRIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeGATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å**2)46.5
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelTFS KRIOS
Minimum Defocus (nm)1000
Maximum Defocus (nm)3000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification81000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging DetailsEPU auto-function coma free correction
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONRELION3.08
IMAGE ACQUISITIONEPU
CTF CORRECTIONGctf
MODEL FITTINGUCSF Chimera
MODEL FITTINGCoot
INITIAL EULER ASSIGNMENTRELION3.08
FINAL EULER ASSIGNMENTRELION3.08
CLASSIFICATIONRELION3.08
RECONSTRUCTIONRELION3.08
MODEL REFINEMENTREFMAC
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION911269