6XSC

Crystal structure of Staphylococcal nuclease variant Delta+PHS V23T at cryogenic temperature

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	20% MPD, 25 mM potassium phosphate, calcium chloride

Crystal Properties
Matthews coefficient	Solvent content
2.21	44.41

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.03	α = 90
b = 60.53	β = 93.2
c = 38.097	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	110	CCD	AGILENT ATLAS CCD		2018-03-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE	Agilent SuperNova	1.54

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	38.04	99.9	0.064	37.26	10.1		9461			35.3

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	2	2.07	100		0.276	4.79	6.1

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	2	38.04	9125	453	99.95	0.2136	0.2114	0.2586	RANDOM	32.725

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]
-0.03		-0.02	0.03		0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.663
r_dihedral_angle_3_deg	16.924
r_dihedral_angle_4_deg	11.236
r_dihedral_angle_1_deg	5.676
r_angle_refined_deg	1.686
r_angle_other_deg	0.775
r_chiral_restr	0.084
r_bond_refined_d	0.013
r_bond_other_d	0.006
r_gen_planes_refined	0.006

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.663
r_dihedral_angle_3_deg	16.924
r_dihedral_angle_4_deg	11.236
r_dihedral_angle_1_deg	5.676
r_angle_refined_deg	1.686
r_angle_other_deg	0.775
r_chiral_restr	0.084
r_bond_refined_d	0.013
r_bond_other_d	0.006
r_gen_planes_refined	0.006
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1033
Nucleic Acid Atoms
Solvent Atoms	43
Heterogen Atoms	26

Software

Software
Software Name	Purpose
REFMAC	refinement
APEX 2	data reduction
CrysalisPro	data scaling
PHASER	phasing
REFMAC	model building

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.