3SK6

Crystal structure of Staphylococcal nuclease variant Delta+NVIAGLA V23K/L36E at cryogenic temperature

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	30% MPD, 25 mM potassium phosphate, calcium chloride, pdTp, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.29	46.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.012	α = 90
b = 60.472	β = 90
c = 79.157	γ = 90

Symmetry
Space Group	P 21 21 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	BRUKER APEX II	multi-layer optics	2010-10-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE	OTHER

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	1.8	33.12	100	0.0474	19.51	21.79	14455	14455			23.8

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	1.8	1.83	100		0.3702		9.69

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	1.8	33.12	14408	14408	725	99.99	0.1998	0.1998	0.1978	0.2377	RANDOM	18.3589

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]
-0.07			-0.12		0.2

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.937
r_dihedral_angle_3_deg	16.188
r_dihedral_angle_1_deg	6.072
r_dihedral_angle_4_deg	5.498
r_scangle_it	5.132
r_scbond_it	3.421
r_mcangle_it	2.115
r_angle_refined_deg	1.493
r_mcbond_it	1.343
r_chiral_restr	0.119

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.937
r_dihedral_angle_3_deg	16.188
r_dihedral_angle_1_deg	6.072
r_dihedral_angle_4_deg	5.498
r_scangle_it	5.132
r_scbond_it	3.421
r_mcangle_it	2.115
r_angle_refined_deg	1.493
r_mcbond_it	1.343
r_chiral_restr	0.119
r_bond_refined_d	0.016
r_gen_planes_refined	0.013

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1036
Nucleic Acid Atoms
Solvent Atoms	117
Heterogen Atoms	33

Software

Software
Software Name	Purpose
XPREP	data reduction
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
APEX	data collection
APEX	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.