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RT XFEL structure of Photosystem II 50 microseconds after the second illumination at 2.27 Angstrom resolution
Serial Crystallography (SX)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 6DHE PDB entry 6DHE
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 BATCH MODE 6.5 298 0.1 M MES, pH 6.5, 0.1 M ammonium chloride, 35% w/v PEG5000
Crystal Properties Matthews coefficient Solvent content 3.18 61.27
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 117.068 α = 90 b = 222.051 β = 90 c = 308.363 γ = 90
Symmetry Space Group P 21 21 21
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 298 CCD RAYONIX MX340-HS 2018-11-27 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 FREE ELECTRON LASER SLAC LCLS BEAMLINE MFX 1.30196 SLAC LCLS MFX
Serial Crystallography Sample delivery method Diffraction ID Description Sample Delivery Method 1 Drop-on-Tape injection
Measurement Diffraction ID Pulse Duration Pulse Repetition Rate Focal Spot Size Pulse Energy Photons Per Pulse 1 40 (fs) 20 9 9.52 (KeV)
Data Reduction Diffraction ID Frames Indexed Crystal Hits Frames Indexed Latices Merged 1
Injection Diffraction ID Description Flow Rate Injector Diameter Injection Power Injector Nozzle Filter Size Carrier Solvent 1 Acoustic Droplet Ejection 4 (µl/min) undefined (µm)
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) CC (Half) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot 1 2.27 33.45 99.6 0.967 11.8 55.8 367301 41.33
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) CC (Half) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 2.27 2.31 97.06 0.047 0.6
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Cut-off Sigma (F) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free (DCC) Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT FREE R-VALUE PDB entry 6DHE 2.27 33.45 1.33 366764 3265 99.51 0.1823 0.1818 0.1824 0.2443 0.2449 47.21
Temperature Factor Modeling Anisotropic B[1][1] Anisotropic B[1][2] Anisotropic B[1][3] Anisotropic B[2][2] Anisotropic B[2][3] Anisotropic B[3][3]
RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 18.5633 f_angle_d 1.5057 f_chiral_restr 0.0602 f_bond_d 0.0145 f_plane_restr 0.0104
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 41525 Nucleic Acid Atoms Solvent Atoms 1415 Heterogen Atoms 8598
Software Software Software Name Purpose PHENIX refinement PDB_EXTRACT data extraction cctbx.xfel data reduction PHASER phasing cxi.merge data scaling