5BO8

Structure of human sialyltransferase ST8SiaIII

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	293	18-21% PEG3350, 30 mM sodium tartrate, 100 mM sodium citrate

Crystal Properties
Matthews coefficient	Solvent content
3.27	62.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 88.17	α = 90
b = 94.22	β = 90
c = 126.19	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	100	CCD	RAYONIX MX-300		2013-09-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	CLSI BEAMLINE 08ID-1	0.97949	CLSI	08ID-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	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	2.7	52.43	97.4	0.141	0.081	0.986	5.5	3.3		28543

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.7	2.83	99.1		0.901	0.542	0.422	1.4	3.3	3789

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2WNB and 4JS2	2.7	52.43	27051	1450	96.53	0.1958	0.1931	0.2461	RANDOM	59.972

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]
-1.26			3.72		-2.46

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.088
r_dihedral_angle_4_deg	21.195
r_dihedral_angle_3_deg	16.457
r_mcangle_it	6.566
r_dihedral_angle_1_deg	6.243
r_mcbond_it	4.382
r_mcbond_other	4.363
r_angle_refined_deg	1.799
r_angle_other_deg	1.304
r_chiral_restr	0.132
r_bond_refined_d	0.014
r_gen_planes_refined	0.008
r_gen_planes_other	0.006
r_bond_other_d	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4548
Nucleic Acid Atoms
Solvent Atoms	60
Heterogen Atoms	266

Software

Software
Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
PHASER	phasing