Experiment: 7ULX

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		298	Purified DDAH1 was concentrated to approximately 10 mg/mL using an Amicon-Ultra centrifugal filter device (10 kDa MWCO). The protein was crystallized at 25 C using the hanging drop method (Hampton Research, Aliso Viejo, CA) from 25 % (w/v) PEG6000, 0.1 M Tris-HCl, pH 8.2. Further optimization was done manually using a 1:1 well solution : DDAH1 stock solution ratio to improve crystal size and morphology. Crystals grew to their maximum size in 3 weeks and were harvested after approximately 25 days. To determine the structure of DDAH1 in complex with the ligand, the crystals were transferred to a reservoir containing 20 uL of 20 mM of the ligand in the crystallization mother liquor (25% PEG 6000, 0.1 M Tris-HCl, pH 8.2) and soaked for 30 min. Before data collection, crystals with good size and morphology were transferred into a cryoprotection solution (Well Solution supplemented with 25 % (v/v) glycerol) for 1 to 5 seconds using a the cryoloop (Hampton Research, Laguna Niguel, CA). Individual hDDAH1:ligand crystals were flash frozen in liquid nitrogen before use.

Crystal Properties
Matthews coefficient	Solvent content
1.99	38.28

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 73.435	α = 90
b = 47.59	β = 109.01
c = 81.12	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 315r		2018-03-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-BM	0.9787	APS	19-BM

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	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	1.707	50	96.9	0.067	0.078	0.04	7.9	3.7		56084

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.71	1.74	88.5		0.642	0.772	0.42	0.624		2.8

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	3P8E	1.707	28.348	1.34	47346	2322	81.69	0.1934	0.1913	0.2351	27.7625

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	4236
Nucleic Acid Atoms
Solvent Atoms	537
Heterogen Atoms

Software

Software
Software Name	Purpose
HKL-2000	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
iMOSFLM	data reduction
PHENIX	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 R01GM133198.