2BEX

Crystal structure of Placental Ribonuclease Inhibitor in complex with Human Eosinophil Derived Neurotoxin at 2A resolution

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1A4Y	PDB ENTRY 1A4Y, PDB ENTRY 1GQV
experimental model	PDB	1GQV	PDB ENTRY 1A4Y, PDB ENTRY 1GQV

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7		1M SODIUM MALONATE, PH 7.0

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 91.98	α = 90
b = 91.98	β = 90
c = 257.65	γ = 120

Symmetry
Space Group	P 31 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	100	CCD	ADSC CCD	MIRROR	2002-09-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.2		SRS	PX14.2

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	1.99	40	99.4	0.07	13.1	27.6		89545			21.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.99	2.06	99.7		0.32	3.6

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 1A4Y, PDB ENTRY 1GQV	1.99	40	84451	3349	94.9	0.2059	0.2059	0.2433	RANDOM	24

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]
-1.454	-1.761		-1.454		2.909

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.11141
c_scangle_it	1.95
c_scbond_it	1.28
c_mcangle_it	1.22
c_angle_deg	1.19367
c_improper_angle_d	0.73195
c_mcbond_it	0.73
c_bond_d	0.004619
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	8875
Nucleic Acid Atoms
Solvent Atoms	616
Heterogen Atoms	14

Software

Software
Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
AMoRE	phasing