1G2U

THE STRUCTURE OF THE MUTANT, A172V, OF 3-ISOPROPYLMALATE DEHYDROGENASE FROM THERMUS THERMOPHILUS HB8 : ITS THERMOSTABILITY AND STRUCTURE.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	293	0.66M ammonium sulfate, 10mM phosphate buffer, 28mg/ml protein , pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.82	67.81

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.68	α = 90
b = 78.68	β = 90
c = 157.69	γ = 120

Symmetry
Space Group	P 32 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	IMAGE PLATE	RIGAKU RAXIS IIC	mirror and beta-filter	1998-10-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

Data Collection

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		THROUGHOUT	2.1	6	2	22972	2271	71.3	0.185	0.185	0.23	RANDOM	31

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
c_dihedral_angle_d	23.4
c_scbond_it	16.97
c_scangle_it	12.56
c_mcangle_it	3.12
c_mcbond_it	2.06
c_angle_deg	1.4
c_improper_angle_d	1.29
c_bond_d	0.006
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2597
Nucleic Acid Atoms
Solvent Atoms	57
Heterogen Atoms

Software

Software
Software Name	Purpose
X-PLOR	model building
CNS	refinement
X-PLOR	phasing