5D9C

Luciferin-regenerating enzyme solved by SIRAS using XFEL (refined against Hg derivative data)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	BATCH MODE	7.5	293	mixing purified LRE solution (27 mg/mL LRE, 10 mM HEPES pH 7.5, 0.1 M NaCl, 10% glycerol) and precipitant solution (35% PEG3350, 10% MPD, 0.1 M HEPES pH 7.5, 0.2 M MgCl2) at ratios between 1:2 and 1:1.6

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.77

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.1	α = 90
b = 77.5	β = 90
c = 84.8	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	293	CCD	MPCCD		2014-05-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	FREE ELECTRON LASER	SACLA BEAMLINE BL3	0.984	SACLA	BL3

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	1.6	25	100	1.82	106.2		80855

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	SIRAS	FREE R-VALUE	1.6	24.712	1.33	74044	2946	91.66	0.2034	0.2021	0.2354	28.3727

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	14.011
f_angle_d	1.452
f_chiral_restr	0.068
f_bond_d	0.014
f_plane_restr	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2385
Nucleic Acid Atoms
Solvent Atoms	164
Heterogen Atoms	11

Software

Software
Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
SHELXDE	phasing
CrystFEL	data reduction

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.