3H6M

Crystal structure of Staphylococcal nuclease variant Delta+PHS V104E 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 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.22	44.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.026	α = 90
b = 60.461	β = 93.96
c = 38.296	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	CCD	ADSC QUANTUM 315	Meridionally-bent fused silica mirror with palladium and uncoated stripes	2009-01-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	0.97950	NSLS	X25

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	99.7	0.165	0.165	19.782	11.7		15538		-3	25.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.7	1.73	99.4		0.165	0.165	19.789	11.7

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		THROUGHOUT	PDB ENTRY 3BDC	1.7	38.205	15599	15538	1543	99.61	0.177	0.177	0.172	0.222	RANDOM, IMPORTED FROM STARTING MODEL	18.556

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]
			-0.01		0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.716
r_dihedral_angle_3_deg	15.425
r_dihedral_angle_4_deg	9.864
r_dihedral_angle_1_deg	5.647
r_scangle_it	5.303
r_scbond_it	3.601
r_mcangle_it	2.353
r_angle_refined_deg	2.25
r_mcbond_it	1.447
r_chiral_restr	0.163

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.716
r_dihedral_angle_3_deg	15.425
r_dihedral_angle_4_deg	9.864
r_dihedral_angle_1_deg	5.647
r_scangle_it	5.303
r_scbond_it	3.601
r_mcangle_it	2.353
r_angle_refined_deg	2.25
r_mcbond_it	1.447
r_chiral_restr	0.163
r_bond_refined_d	0.026
r_gen_planes_refined	0.012

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1069
Nucleic Acid Atoms
Solvent Atoms	116
Heterogen Atoms	26

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
CBASS	data collection
HKL-2000	data reduction
HKL-2000	data scaling
Coot	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.