5TJO

Crystal structure of GTB + B trisaccharide (mercury derivative)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION		277	The first crystals of GTA/GTB were grown as mercury derivatives (Patenaude, S.I., et al. 2002): 10 ul drops with 6-8 mg/ml protein, 70 mM N-(2-acetamido)-2-iminodiacetic acid (ADA) pH 7.5, 50 mM, sodium acetate pH 4.6, 40 mM NaCl, 5-8 mM MnCl2, 2.5% (v/v) 2-methyl-2,4-pentanediol (MPD), 5%(v/v) glycerol, 2%(w/v) PEG 4000, and 0.3-0.5 mM 3-chloromercuri-2-methoxypropylurea suspended over 1 ml of a resevoir solution: 50 mM ADA pH 7.5, 10 mM MnCl2, 100 mM ammonium sulfate, 5%(v/v) MPD, 10%(v/v) glycerol, and 8-10%(w/v) PEG 4000. Crystals were washed with artificial mother liquor ML-1 consisting of 10% polyethylene glycol (PEG) 4000, 30 mM N-(2-acetamido)-2-iminodiacetic acid (ADA) buffer pH 7.5, 30 mM sodium acetate buffer pH 4.6, 100 mM ammonium sulfate, 10 mM MnCl2 and 30% glycerol as the cryoprotectant. Crystals of GTA/GTB in complex with the A and B trisaccharides were obtained by soaking them in mother liquor ML-1 with 30% glycerol and 45-50 mM substrates for 2-5 days at 18 degrees Celsius

Crystal Properties
Matthews coefficient	Solvent content
2.27	45.76

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 52.71	α = 90
b = 150.65	β = 90
c = 79.18	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	113	IMAGE PLATE	RIGAKU RAXIS IV++		2009-04-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-002	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim 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	1.57	19.92	98.6	0.04	0.04	17.3	4.46		43816

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.57	1.63	98.1		0.317	3.7	3.7

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	1LZ7	1.57	19.92	41593	2213	98.52	0.1747	0.1736	0.1958	RANDOM	24.013

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]
-0.55			0.28		0.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.826
r_dihedral_angle_4_deg	17.018
r_dihedral_angle_3_deg	11.055
r_dihedral_angle_1_deg	6.2
r_mcangle_it	2.155
r_angle_refined_deg	1.5
r_mcbond_it	1.404
r_mcbond_other	1.394
r_angle_other_deg	1.152
r_chiral_restr	0.086
r_bond_refined_d	0.01
r_gen_planes_refined	0.007
r_bond_other_d	0.004
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2109
Nucleic Acid Atoms
Solvent Atoms	200
Heterogen Atoms	45

Software

Software
Software Name	Purpose
d*TREK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
d*TREK	data reduction
PHASER	phasing