2RIQ

Crystal Structure of the Third Zinc-binding domain of human PARP-1

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	277	20% ethanol, 100 mM Tris-HCl pH 8.5, 25 mM NaCl, and 0.5 mM TCEP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.89	57.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.841	α = 90
b = 85.652	β = 90
c = 67.758	γ = 90

Symmetry
Space Group	C 2 2 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		2007-06-12	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X12C	1.1, 1.28	NSLS	X12C

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	1.7	40	98.3	0.048	34.8	8		22986			25.3

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	1.7	1.76	84.6		0.38	3.6	5.6	1953

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	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	SAD	THROUGHOUT	1.7	20	0.38	21771	1146	98.18	0.18077	0.17838	0.23	RANDOM	39.182

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]
3.12			-1.9		-1.21

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.558
r_dihedral_angle_3_deg	12.856
r_dihedral_angle_4_deg	8.5
r_dihedral_angle_1_deg	5.45
r_scangle_it	4.068
r_scbond_it	2.601
r_angle_refined_deg	1.46
r_mcangle_it	1.456
r_mcbond_it	0.888
r_nbtor_refined	0.311
r_nbd_refined	0.201
r_symmetry_vdw_refined	0.168
r_xyhbond_nbd_refined	0.141
r_symmetry_hbond_refined	0.141
r_chiral_restr	0.098
r_bond_refined_d	0.015
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1064
Nucleic Acid Atoms
Solvent Atoms	171
Heterogen Atoms	22

Software

Software
Software Name	Purpose
REFMAC	refinement
CBASS	data collection
HKL-2000	data reduction
HKL-2000	data scaling
SOLVE	phasing