4IZ8

Crystal structure of Staphylococcal nuclease variant Delta+PHS H8E at cryogenic temperature

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	277	23% MPD, 25 mM potassium phosphate, calcium chloride, pdTp, pH 6, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.21	44.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.054	α = 90
b = 60.456	β = 93.29
c = 38.037	γ = 90

Symmetry
Space Group	P 1 21 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	PIXEL	DECTRIS PILATUS 6M	Meridionally-bent fused silica mirror with palladium and uncoated stripes vertically-focusing at 6.6:1 demagnification	2013-01-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	0.979	NSLS	X25

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	50	97.7	0.059	13.9	5.6	15234	15234			34.2

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	1.7	1.73	96.4		0.174		4.1	773

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3BDC	1.7	37.97	15218	15218	765	97.23	0.1787	0.1787	0.1769	0.2126	RANDOM	33.3254

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]
-2.73		0.89	-2.11		4.76

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.413
r_dihedral_angle_3_deg	14.85
r_dihedral_angle_4_deg	8.721
r_dihedral_angle_1_deg	6.47
r_angle_refined_deg	1.929
r_angle_other_deg	0.884
r_chiral_restr	0.146
r_bond_refined_d	0.017
r_gen_planes_refined	0.011
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.413
r_dihedral_angle_3_deg	14.85
r_dihedral_angle_4_deg	8.721
r_dihedral_angle_1_deg	6.47
r_angle_refined_deg	1.929
r_angle_other_deg	0.884
r_chiral_restr	0.146
r_bond_refined_d	0.017
r_gen_planes_refined	0.011
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1032
Nucleic Acid Atoms
Solvent Atoms	81
Heterogen Atoms	26

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
CBASS	data collection
HKL-2000	data reduction
HKL-2000	data scaling

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.