2A1R

Crystal structure of PARN nuclease domain

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	293	PEG 3350, 0.2M ammonium tartrate, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.68	53.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.778	α = 90
b = 92.401	β = 90
c = 159.642	γ = 90

Symmetry
Space Group	P 21 21 21

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 QUANTUM 210		2004-10-30	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29	0.9791, 0.9793, 0.9762	ESRF	ID29

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	2.6	50	95.7	0.078	7.6	5	36514	36318	2	2	56.2

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	2.64	2.71	97.3		0.456	3.2	4.5	2353

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.6	20	2	36514	31218	1610	97.24	0.2208	0.21909	0.21823	0.23561	RANDOM	49.222

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]
3.98			-5.57		1.58

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.546
r_scangle_it	3.144
r_mcangle_it	1.997
r_scbond_it	1.772
r_angle_refined_deg	1.292
r_mcbond_it	1.054
r_angle_other_deg	0.794
r_symmetry_vdw_other	0.257
r_nbd_other	0.232
r_nbd_refined	0.208
r_symmetry_vdw_refined	0.201
r_xyhbond_nbd_refined	0.17
r_symmetry_hbond_refined	0.121
r_nbtor_other	0.087
r_chiral_restr	0.076
r_bond_refined_d	0.012
r_gen_planes_refined	0.004
r_bond_other_d	0.002
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4799
Nucleic Acid Atoms	126
Solvent Atoms	153
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
SnB	phasing