2MAS

PURINE NUCLEOSIDE HYDROLASE WITH A TRANSITION STATE INHIBITOR

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1MAS	UNLIGANDED IU-NH (PDB CODE 1MAS), WATERS AND IONS REMOVED

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5		1.8 M AMMONIUM SULFATE, 3% ISOPROPANOL, pH 7.5

Crystal Properties
Matthews coefficient	Solvent content
3.58	65

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 120.63	α = 90
b = 159.76	β = 90
c = 206.38	γ = 90

Symmetry
Space Group	I 2 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	293	AREA DETECTOR	SIEMENS		1995-10-16	M

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

Data Collection

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.3	2.5	75.1		2.2

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	UNLIGANDED IU-NH (PDB CODE 1MAS), WATERS AND IONS REMOVED	2.3		73166	6118	80.8	0.205	0.205	0.234	SHELLS	29.1

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_mcangle_it	2.61
x_scangle_it	2.61
x_mcbond_it	2.46
x_scbond_it	2.46
x_angle_deg	1.8
x_improper_angle_d	1.6
x_bond_d	0.011
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
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9560
Nucleic Acid Atoms
Solvent Atoms	158
Heterogen Atoms	72

Software

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