Experiment: 4PBU

Serial Time-resolved crystallography of Photosystem II using a femtosecond X-ray laser The S1 state

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3ARC

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIQUID DIFFUSION	7	283	100 mM Pipes pH 7.0, 5 mM CaCl2, 10 mM tocopherol, and 10-17% PEG 2000

Crystal Properties
Matthews coefficient	Solvent content
3.96	68.92

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 133.25	α = 90
b = 226.26	β = 90
c = 307.09	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	PIXEL	CS-PAD CXI-2	several days	2012-01-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	FREE ELECTRON LASER	SLAC LCLS BEAMLINE CXI	2.04	SLAC LCLS	CXI

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	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	5	100.638	100	5.4	684	41704	40964			285.07

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	5	5.123	99		2.1	617

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	3ARC	5	100.638	1.36	40946	2056	99.98	0.2607	0.2606	0.2721	0.262	0.2694	33.7489

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	21.659
f_angle_d	3.029
f_chiral_restr	0.491
f_bond_d	0.039
f_plane_restr	0.02

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	41296
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	7625

Software

Software
Software Name	Purpose
Cheetah	data collection
CrystFEL	data reduction
PDB_EXTRACT	data extraction
PHASER	phasing
PHENIX	refinement