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CryoEM Structure of Human BTN2A1 ectodomain in complex with TCR-blocking 2A1.12 Fab
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 8DFW in silico model AlphaFold
Sample Complex of Dimeric Human BTN2A1 ectodomain with TCR-Blocking 2A1.12 Fab and bulking Nanobody Sample Components Human BTN2A1 ectodomain Anti-BTN2A1 Fab 2A1.12 Heavy chain of 2A1.12 Fab Light chain of 2A1.12 Fab Variable heavy chain domain nanobody
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 213773 Reported Resolution (Å) 3.86 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (8DFW) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Cross-correlation Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 60
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 900 Maximum Defocus (nm) 2500 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 Imaging Mode BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION Topaz 0.2.5 IMAGE ACQUISITION EPU 3.5 CTF CORRECTION CTFFIND 4.1.14 CTF CORRECTION RELION 5.0-beta2 MODEL FITTING PHENIX 1.21.1_5286 INITIAL EULER ASSIGNMENT RELION 5.0-beta2 FINAL EULER ASSIGNMENT RELION 5.0-beta2 RECONSTRUCTION RELION 5.0-beta2 MODEL REFINEMENT PHENIX 1.21.1_5286
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 898426