1H53

Binding of Phosphate and Pyrophosphate ions at the active site of human Angiogenin as revealed by X-ray Crystallography

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.2		20MM SODIUM CITRATE, 0.2M SODIUM POTASSIUM TARTARATE, 10% PEG 6000 PH 5.2

Crystal Properties
Matthews coefficient	Solvent content
2.19	43.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 85.383	α = 90
b = 37.538	β = 90
c = 38.534	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	287				1998-09-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X13		EMBL/DESY, HAMBURG	X13

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	40	97.8	0.1	6.4	5.3		8677			23.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.06	85.6

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	PDB ENTRY 1B1I	2	20	8648	428	97.8	0.198	0.198	0.26	RANDOM	25.3

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	27.1
x_scangle_it	4.72
x_mcangle_it	3.06
x_scbond_it	2.98
x_mcbond_it	1.86
x_angle_deg	1.6
x_improper_angle_d	0.75
x_bond_d	0.01
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

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	971
Nucleic Acid Atoms
Solvent Atoms	47
Heterogen Atoms	18

Software

Software
Software Name	Purpose
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing