6DHO

RT XFEL structure of the two-flash state of Photosystem II (2F, S3-rich) at 2.07 Angstrom resolution

X-RAY DIFFRACTION

Serial Crystallography (SX)

Serial Crystallography (SX)

Serial Crystallography (SX)

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5KAF

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
3.4	63.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 117.011	α = 90
b = 221.542	β = 90
c = 308.346	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	2016-07-14	M	SINGLE WAVELENGTH
3	1	x-ray	298	CCD	RAYONIX MX170-HS	Compound refractive lenses	2017-07-13	M	SINGLE WAVELENGTH
2	1	x-ray	298	CCD	RAYONIX MX170-HS	Compound refractive lenses	2016-10-20	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
3	FREE ELECTRON LASER	SLAC LCLS BEAMLINE MFX	1.305	SLAC LCLS	MFX
2	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 (fs)	10	3	9.515 (KeV)

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	2.07	30.58	99.96	0.982	15.463	207.28		483509

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	2.07	2.106	99.98		0.021	0.582	13.75

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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	5KAF	2.07	30.578	1.33	482673	4285	99.82	0.185	0.1844	0.2475	46.7274

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	1886
Heterogen Atoms	19205

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.