6U0X

Crystal structure of Staphylococcal nuclease variant Delta+PHS Q123D at cryogenic temperature

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	277	20% MPD, 25 mM potassium phosphate, calcium chloride, THP

Crystal Properties
Matthews coefficient	Solvent content
2.21	44.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 30.853	α = 90
b = 60.715	β = 92.65
c = 38.119	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	77	PIXEL	DECTRIS PILATUS 200K		2018-04-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	OTHER	1.54

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	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	1.86	38.08	93.1	0.038	0.046	0.998	18.37	3.104		11140			33.323

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.86	1.9	47.7		0.152	0.201	0.974	4.62	1.951

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 3BDC	1.86	38.08	10571	562	93.08	0.2111	0.208	0.2717	RANDOM	32.494

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]
-0.54		0.14	0.59		-0.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.984
r_dihedral_angle_3_deg	14.801
r_dihedral_angle_4_deg	6.935
r_dihedral_angle_1_deg	6.414
r_angle_refined_deg	1.619
r_chiral_restr	0.105
r_bond_refined_d	0.013
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1032
Nucleic Acid Atoms
Solvent Atoms	71
Heterogen Atoms	26

Software

Software
Software Name	Purpose
REFMAC	refinement
XSCALE	data scaling
PHASER	phasing
PDB_EXTRACT	data extraction
XDS	data reduction

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.