3DHQ | pdb_00003dhq

Crystal structure of Staphylococcal nuclease variant Delta+PHS A90R at cryogenic temperature

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	24% MPD, 25 mM Potassium Phosphate, Calcium Chloride, pdTP, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.21	44.43

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 30.931	α = 90
b = 60.603	β = 93.93
c = 38.421	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	BRUKER APEX II	multi-layer optics	2007-07-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE	OTHER	1.5418

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	2.15	38.3	100	0.0201	0.0477	36.48	15.57	7789	7790			38.2

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	2.15	2.25	100		0.1366	0.2555	7.06	9.52	980

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.15	30.3	7790	7752	750	99.77	0.215	0.208	0.2227	0.276	RANDOM	32.558

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			0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.024
r_dihedral_angle_3_deg	17.382
r_dihedral_angle_1_deg	14.988
r_dihedral_angle_4_deg	5.749
r_scangle_it	2.825
r_angle_refined_deg	1.925
r_scbond_it	1.846
r_mcangle_it	1.383
r_mcbond_it	0.817
r_nbtor_refined	0.305
r_symmetry_vdw_refined	0.24
r_nbd_refined	0.207
r_symmetry_hbond_refined	0.189
r_xyhbond_nbd_refined	0.179
r_chiral_restr	0.13
r_bond_refined_d	0.012
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1039
Nucleic Acid Atoms
Solvent Atoms	70
Heterogen Atoms	26

Software

Software
Software Name	Purpose
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
APEX	data collection
SAINT	data reduction
SAINT	data scaling