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Cryo-EM structure of human tankyrase 2 SAM-PARP filament (G1032W mutant)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 5NWG experimental model PDB 5JRT
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 19.041 f_angle_d 0.547 f_chiral_restr 0.044 f_bond_d 0.005 f_plane_restr 0.004
Sample TNKS2 SAM-PARP (867-1162) filament
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method HELICAL Number of Particles 139880 Reported Resolution (Å) 2.98 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type HELICAL Axial Symmetry D1 Axial Rise 13.6 Angular Rotation -52.3
Map-Model Fitting and Refinement Id 1 (5NWG, 5JRT) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target FSC Overall B Value 7.41 Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) GATAN K3 (6k x 4k) Electron Dose (electrons/Å**2) 40 40
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 1200 Maximum Defocus (nm) 3500 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 81000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version IMAGE ACQUISITION EPU CTF CORRECTION RELION 3.08 MODEL FITTING UCSF Chimera 1.14 MODEL FITTING Coot 0.9 CLASSIFICATION RELION 3.08 RECONSTRUCTION RELION 3.08 MODEL REFINEMENT PHENIX 1.18.2
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 188925