1A9Q

BOVINE PURINE NUCLEOSIDE PHOSPHORYLASE COMPLEXED WITH INOSINE

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1PBN	PDB ENTRY 1PBN

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				PROTEIN WAS CRYSTALLIZED FROM 31-35% PEG-400 IN 100 MM HEPES BUFFER, PH 7.8-8.2; 100 MM MGCL2; 1% OCTYL-BETA- D-GLUCOPYRANOSIDE. CRYSTAL SOAKED IN ARTI- FICIAL MOTHER LIQUOR CONTAINING 7.3 MM INOSINE.

Crystal Properties
Matthews coefficient	Solvent content
2.22	44.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 94.2	α = 90
b = 94.2	β = 90
c = 94.2	γ = 90

Symmetry
Space Group	P 21 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	296	AREA DETECTOR	XUONG-HAMLIN MULTIWIRE		1996-08-09	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	8	89				15990

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1PBN	2	8	2	15990			0.2	0.2		RANDOM	19

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_angle_deg	1.5
x_improper_angle_d	1.1
x_bond_d	0.006
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
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2194
Nucleic Acid Atoms
Solvent Atoms	55
Heterogen Atoms	15

Software

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