3UAN

Crystal structure of 3-O-sulfotransferase (3-OST-1) with bound PAP and heptasaccharide substrate

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROBATCH	5.5	293	Crystals of the 3-OST-1/PAP/heptasaccharide complex were obtained using micro-batch technique, by mixing 1.5 mL of the complex (12.9 mg/mL 3-OST-1, 5 mM heptasaccharide, 4 mM PAP, 23.6 mM Tris pH 7.5, 142 mM NaCl) was mixed with 2.5 mL of 0.1 M sodium citrate pH 5.5 and 20% PEG 3000. Crystals grew to a usable size after 10 days incubation at room temperature. The crystals were transferred in two steps to a cryoprotectant solution containing 0.1 M sodium citrate pH 5.5, 0.1 M NaCl, 4 mM PAP, 20 mM heptasaccharide, 30% PEG3000, and 7.6% ethylene glycol. , temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.25	45.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 52.883	α = 90
b = 62.168	β = 95.16
c = 86.373	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	93	IMAGE PLATE	MAR scanner 345 mm plate		2011-03-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1	APS	22-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (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	1.844	25	96.95	0.05	21.8	3.7	46408	44993			26.97

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.844	1.88	84.6		0.314	3.11	2.9	2039

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	Rfree	PDB ENTRY 1ZRH	1.844	24.57	46408	44993	2247	93.2	0.175	0.175	0.1742	0.2023	random

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]
5.5316		3.9567	0.1457		-5.6773

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	11.97
f_angle_d	0.838
f_chiral_restr	0.056
f_bond_d	0.004
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4103
Nucleic Acid Atoms
Solvent Atoms	266
Heterogen Atoms	236

Software

Software
Software Name	Purpose
StructureStudio	data collection
MOLREP	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	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.