6DHG

RT XFEL structure of Photosystem II 150 microseconds after the second illumination at 2.5 Angstrom resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	BATCH MODE	6.5	298	0.1 M MES pH 6.5, 0.1 M NH4Cl, 35% (w/v) PEG 5000

Crystal Properties
Matthews coefficient	Solvent content
3.44	64.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 117.553	α = 90
b = 222.695	β = 90
c = 309.061	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 MX170-HS	Compound refractive lenses	2017-07-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	FREE ELECTRON LASER	SLAC LCLS BEAMLINE MFX	1.305	SLAC LCLS	MFX

Serial Crystallography

Sample delivery method
Diffraction ID	Description	Sample Delivery Method
1		fixed target

Measurement
Diffraction ID	Pulse Duration	Pulse Repetition Rate	Focal Spot Size	Pulse Energy	Photons Per Pulse
1	40	10	3	9.53

Data Reduction
Diffraction ID	Frames Indexed	Crystal Hits	Total Frames
1

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	2.5	30.78	99.93	0.938	11.143	61.41		279073

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	2.5	2.543	99.99		0.068	0.983	12.86

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION		THROUGHOUT	2.5	30.783	1.33	278571	2478	99.81	0.168	0.1673	0.2464	53.8673

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	41576
Nucleic Acid Atoms
Solvent Atoms	1879
Heterogen Atoms	19171

Software

Software
Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
cctbx.xfel	data reduction
PHASER	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.