4K14

Crystal Structure of Staphylococcal nuclease mutant V66I/V99L

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	277	50mM phosphate buffer,pH 7.5 45% MPD, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.84

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 47.45	α = 90
b = 47.45	β = 90
c = 63.87	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	298	DIFFRACTOMETER	RIGAKU AFC9	mirrors	2011-05-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007	1.5418

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	1.6	21.22	84	0.033	12.4	2	31504	15733

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	1.601	20.14	14921	801	84.09	0.20971	0.20747	0.25152	RANDOM	36.794

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			0.03		-0.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.553
r_dihedral_angle_4_deg	17.399
r_dihedral_angle_3_deg	17.264
r_dihedral_angle_1_deg	6.184
r_scangle_it	4.822
r_scbond_it	3.048
r_mcangle_it	2.047
r_angle_refined_deg	1.539
r_mcbond_it	1.253
r_nbtor_refined	0.303
r_symmetry_vdw_refined	0.242
r_symmetry_hbond_refined	0.227
r_nbd_refined	0.208
r_xyhbond_nbd_refined	0.174
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	1093
Nucleic Acid Atoms
Solvent Atoms	79
Heterogen Atoms

Software

Software
Software Name	Purpose
CrystalClear	data collection
CCP4	model building
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling
CCP4	phasing