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 37UU | pdb_000037uu

Cryo-EM structure of human Fibroblast Activation Protein alpha in complex with F7 VHH


ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
in silico modelModelAngelo 
Sample
Fibroblast activation protein alpha in complex with F7-Fc
Sample Components
Human fibroblast activation protein alpha
Camelid F7 single-domain antibody
Human IgG-1 Fc region of F7-Fc
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles82130
Reported Resolution (Å)2.5
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC2
Map-Model Fitting and Refinement
Id1
Refinement SpaceREAL
Refinement ProtocolAB INITIO MODEL
Refinement Target
Overall B Value
Fitting Procedure
DetailsAn initial ModelAngelo-generated atomic model was docked into the cryo-EM density and iteratively rebuilt in Coot. Automated real-space refinement was ...An initial ModelAngelo-generated atomic model was docked into the cryo-EM density and iteratively rebuilt in Coot. Automated real-space refinement was performed in Phenix using stereochemical and noncrystallographic symmetry restraints.
Data Acquisition
Detector TypeGATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)80
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelTFS KRIOS
Minimum Defocus (nm)500
Maximum Defocus (nm)2000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification105000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONcisTEM
IMAGE ACQUISITIONSerialEM
CTF CORRECTIONcisTEM
MODEL FITTINGCoot
INITIAL EULER ASSIGNMENTcisTEM
FINAL EULER ASSIGNMENTcisTEM
CLASSIFICATIONcisTEM
RECONSTRUCTIONcisTEM
MODEL REFINEMENTPHENIX
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION