1GSH

STRUCTURE OF ESCHERICHIA COLI GLUTATHIONE SYNTHETASE AT PH 7.5

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICRODIALYSIS	7.5		CRYSTALS WERE PREPARED AT PH 7.5 BY MICRODIALYSIS METHOD WITH AMMONIUM SULFATE AS THE PRECIPITATING AGENT. THE INNER SOLUTION 100 MICROLITER CONTAINED 1.5 % (W/V) GSHASE, 5 MM MGCL2 AND 10 % SATURATED AMMONIUM SULFATE IN 50 MM TRIS-HCL BUFFER (PH 7.5). THE INNER SOLUTION WAS DIALYZED AGAINST 50 MM TRIS-HCL BUFFER (PH 7.5) WHICH CONTAINED 5 MM MGCL2 AND 25 % SATURATED AMMONIUM SULFATE.TRIS-HCL BUFFER, microdialysis

Crystal Properties
Matthews coefficient	Solvent content
2.81	44

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.8	α = 90
b = 87.8	β = 90
c = 170	γ = 120

Symmetry
Space Group	P 62 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray		IMAGE PLATE	RIGAKU		1991-03-18	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-6A		Photon Factory	BL-6A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	2		90.3	0.07				30967		1

Refinement

Statistics
Diffraction ID	Structure Solution 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		2	10	2	24108		90.3	0.208	0.208		18.2

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
x_dihedral_angle_d	25.35
x_scbond_it	21.41
x_mcbond_it	18.27
x_angle_deg	2.773
x_improper_angle_d	1.005
x_bond_d	0.012
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcangle_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2369
Nucleic Acid Atoms
Solvent Atoms	96
Heterogen Atoms

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
WEIS	data reduction
X-PLOR	phasing