4G57

Staphylococcal Nuclease double mutant I72L, I92L

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.4	277	57% MPD, 200 mM Tris.HCl buffer, approx. 6 mg/ml protein, pH 8.4, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.2	α = 90
b = 48.2	β = 90
c = 63.8	γ = 90

Symmetry
Space Group	P 41

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	300	CCD	RIGAKU SATURN 92		2011-04-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007	1.54

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.6	48.22	53.56			28649	15345

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.6	1.66			0.8	1.88

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	1.81	48.22	15345	12399	682	97.12	0.19242	0.19011	0.23224	RANDOM	34.977

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]
0.66			0.66		-1.33

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.986
r_dihedral_angle_4_deg	16.636
r_dihedral_angle_3_deg	16.229
r_dihedral_angle_1_deg	6.385
r_scangle_it	5.068
r_scbond_it	3.198
r_mcangle_it	2.101
r_angle_refined_deg	1.486
r_mcbond_it	1.175
r_nbtor_refined	0.3
r_nbd_refined	0.222
r_symmetry_vdw_refined	0.173
r_symmetry_hbond_refined	0.163
r_xyhbond_nbd_refined	0.132
r_chiral_restr	0.117
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1081
Nucleic Acid Atoms
Solvent Atoms	90
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
d*TREK	data reduction
d*TREK	data scaling
MIFit8	phasing