3SXH | pdb_00003sxh

Crystal structure of Staphylococcal nuclease variant Delta+PHS I92AL103A at cryogenic temperature

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3BDC	PDB ENTRY 3BDC

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9	277	20% MPD, 25 mM potassium phosphate, calcium chloride, pdTp, pH 9.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.13

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.144	α = 90
b = 60.36	β = 93.12
c = 38.357	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		2010-01-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.1000	NSLS	X25

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	1.4	50	99	0.049	13.4	6.3	27568	27568			24.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.4	1.42	100		0.219		6.2	1382

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 (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	PDB ENTRY 3BDC	1.4	31.1	27568	27544	2719	98.54	0.1721	0.1692	0.1659	0.199	0.1963	RANDOM	20.8102

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]
-0.55		0.34	-0.95		1.54

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.641
r_dihedral_angle_3_deg	14.841
r_dihedral_angle_4_deg	9.024
r_dihedral_angle_1_deg	6.451
r_scangle_it	4.93
r_scbond_it	3.287
r_mcangle_it	2.159
r_angle_refined_deg	1.675
r_mcbond_it	1.353
r_chiral_restr	0.124
r_gen_planes_refined	0.016
r_bond_refined_d	0.014

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1027
Nucleic Acid Atoms
Solvent Atoms	136
Heterogen Atoms	26

Software

Software
Software Name	Purpose
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
CBASS	data collection
HKL-2000	data reduction