4DGZ

Crystal structure of Staphylococcal nuclease variant Delta+PHS I92A/L125A at cryogenic temperature

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	277	20% MPD, 25 mM potassium phosphate, calcium chloride, pdTp, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.068	α = 90
b = 60.399	β = 93.5
c = 38.48	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		2011-09-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.1000	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	1.47	50	98.5	0.054	19.3	5.9	23894	23894			29.5

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	1.47	1.5	86.2		0.169	8.3	3.4	1027

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	1.47	32.41	23838	23838	2397	98.53	0.1773	0.1773	0.1736	0.2126	RANDOM	24.6043

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]
-1.42		0.38	-1.34		2.8

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.233
r_dihedral_angle_3_deg	15.816
r_dihedral_angle_4_deg	8.263
r_dihedral_angle_1_deg	6.386
r_scangle_it	4.669
r_scbond_it	3.207
r_mcangle_it	2.091
r_angle_refined_deg	1.837
r_mcbond_it	1.382
r_chiral_restr	0.126

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.233
r_dihedral_angle_3_deg	15.816
r_dihedral_angle_4_deg	8.263
r_dihedral_angle_1_deg	6.386
r_scangle_it	4.669
r_scbond_it	3.207
r_mcangle_it	2.091
r_angle_refined_deg	1.837
r_mcbond_it	1.382
r_chiral_restr	0.126
r_bond_refined_d	0.018
r_gen_planes_refined	0.014

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1027
Nucleic Acid Atoms
Solvent Atoms	118
Heterogen Atoms	26

Software

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

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.