5XGT

Crystal structure of the N-terminal domain of Staphylococcus aureus single-stranded DNA-binding protein SsbA at 1.82 angstrom resolution

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1X3E

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	298	22% PEG 4000, 100mM HEPES sodium salt pH 7.5, 100mM sodium acetate

Crystal Properties
Matthews coefficient	Solvent content
2.41	48.92

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 88.792	α = 90
b = 88.792	β = 90
c = 57.686	γ = 90

Symmetry
Space Group	P 41 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	CCD	ADSC QUANTUM 210		2015-10-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSRRC BEAMLINE BL13C1	0.975	NSRRC	BL13C1

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	1.82	30	99.9	0.075	27.47	8.6		23485

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.82	1.9	99.9		4.2	8.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	1X3E	1.82	30	20126	1095	99.88	0.19525	0.19323	0.23311	RANDOM	31.221

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]
0.46			0.46		-0.92

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.851
r_dihedral_angle_4_deg	17.721
r_dihedral_angle_3_deg	14.895
r_long_range_B_other	8.447
r_long_range_B_refined	8.444
r_dihedral_angle_1_deg	6.968
r_scangle_other	5.883
r_mcangle_it	4.787
r_mcangle_other	4.785
r_scbond_it	3.704
r_scbond_other	3.702
r_mcbond_other	3.021
r_mcbond_it	3.02
r_angle_refined_deg	1.86
r_angle_other_deg	0.867
r_chiral_restr	0.112
r_bond_refined_d	0.018
r_gen_planes_refined	0.009
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1651
Nucleic Acid Atoms
Solvent Atoms	109
Heterogen Atoms	6

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data processing
HKL-2000	data scaling
MOLREP	phasing