3MVV | pdb_00003mvv

Crystal structure of Staphylococcal nuclease variant Delta+PHS F34A 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	3BDC with all H2O, Ca2+ and THP removed and the following truncations: H8A, T13A, Q30A, F34A, K64A, T82A, Y113A, V114A, Y115A; all b-factors were reset to 20.

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9	277	25% MPD, 25 mM Potassium Phosphate, Calcium Chloride, pdTp, pH 9.0, vapor diffusion, hanging drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.25	45.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 30.577	α = 90
b = 61.163	β = 92.52
c = 38.62	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	1.0080	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	1.72	50	99.7	0.058	16.8	7.3	15190	15190			30.7

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	1.72	1.75	99.9		0.28		6.9	733

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 (All)	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	3BDC with all H2O, Ca2+ and THP removed and the following truncations: H8A, T13A, Q30A, F34A, K64A, T82A, Y113A, V114A, Y115A; all b-factors were reset to 20.	1.72	38.58	15167	15120	1516	99.68	0.1824	0.187	0.182	0.1829	0.23	0.2285	RANDOM	22.533

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]
-1.92		0.75	-1.06		3.05

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.074
r_dihedral_angle_3_deg	18.62
r_dihedral_angle_4_deg	10.289
r_dihedral_angle_1_deg	6.238
r_scangle_it	5.674
r_scbond_it	3.634
r_mcangle_it	2.399
r_angle_refined_deg	1.581
r_mcbond_it	1.543
r_chiral_restr	0.137
r_bond_refined_d	0.016
r_gen_planes_refined	0.012

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1027
Nucleic Acid Atoms
Solvent Atoms	79
Heterogen Atoms	26

Software

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