3EJI | pdb_00003eji

Crystal structure of Staphylococcal nuclease variant Delta+PHS L36K at cryogenic temperature

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	279	44% MPD, 25 mM Potassium Phosphate, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 279K

Crystal Properties
Matthews coefficient	Solvent content
2.27	45.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.2	α = 90
b = 48.2	β = 90
c = 63.21	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	100	CCD	BRUKER PROTEUM	multi-layer optics	2005-01-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	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	1.75	48.2	99.4	0.0344	0.0431	19.93	5.11	11270	11208			32.3

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)
	1.75	1.85	96.8		0.2572	0.2657	3.75	5.11	1736

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.9	48.22	9990	983	87.21	0.209	0.203	0.2021	0.272	0.2695	RANDOM	26.508

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]
0.18			0.18		-0.37

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.87
r_dihedral_angle_4_deg	19.844
r_dihedral_angle_3_deg	16.677
r_dihedral_angle_1_deg	6.089
r_scangle_it	3.42
r_scbond_it	2.267
r_angle_refined_deg	1.435
r_mcangle_it	1.395
r_mcbond_it	0.883
r_nbtor_refined	0.308
r_symmetry_hbond_refined	0.228
r_nbd_refined	0.21
r_symmetry_vdw_refined	0.206
r_xyhbond_nbd_refined	0.154
r_chiral_restr	0.099
r_bond_refined_d	0.014
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1063
Nucleic Acid Atoms
Solvent Atoms	79
Heterogen Atoms	5

Software

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