1S4S

Reaction Intermediate in the Photocycle of PYP, intermediate occupied between 100 micro-seconds to 5 milli-seconds

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	291	Ammoniumsulphate, Potassium Phosphate, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
1.9	35.17

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.9	α = 90
b = 66.9	β = 90
c = 40.8	γ = 120

Symmetry
Space Group	P 63

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	neutron	288	IMAGE PLATE	MARRESEARCH		2000-12-01	L	LAUE
2	1	neutron	288	CCD	ADSC QUANTUM 4		2000-12-01	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 14-ID-B	1.0-1.5	APS	14-ID-B
2	SYNCHROTRON	APS BEAMLINE 14-ID-B	1.0-1.5	APS	14-ID-B

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
1,2	1.9	40	100			8326	8326	3	3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	2phy	1.9	15	8326	8326	457		0.2446	0.2446	0.2892

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	1066
Nucleic Acid Atoms
Solvent Atoms	89
Heterogen Atoms	11

Software

Software
Software Name	Purpose
KB_SCAN	data collection
LaueView	data reduction
SVD4TX	data reduction
XTALVIEW	refinement
CNS	refinement
KB_SCAN	data reduction
LaueView	data scaling
SVD4TX	data scaling

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.