4ECG

Crystal structure of a putative iron-regulated protein A precursor (BDI_2603) from Parabacteroides distasonis ATCC 8503 at 2.30 A resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	277	40.00% polyethylene glycol 400, 0.200M calcium acetate, 0.1M HEPES pH 7.5, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.91	57.77

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 113.892	α = 90
b = 113.892	β = 90
c = 75.219	γ = 90

Symmetry
Space Group	I 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	MARMOSAIC 325 mm CCD	double crystal monochromator	2012-01-13	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.91837,0.97949	SSRL	BL9-2

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	2.3	29.124	98.1	0.044	11.97			21402		-3	52.286

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	2.3	2.38	96.4		0.486	1.8

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.3	29.124	21391	1097	99.45	0.1632	0.1617	0.1927	RANDOM	55.4796

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]
-1.4			-1.4		2.81

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.318
r_dihedral_angle_3_deg	15.491
r_dihedral_angle_4_deg	12.948
r_dihedral_angle_1_deg	6.147
r_angle_refined_deg	1.697
r_angle_other_deg	1.037
r_chiral_restr	0.095
r_bond_refined_d	0.017
r_gen_planes_refined	0.008
r_bond_other_d	0.002

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.318
r_dihedral_angle_3_deg	15.491
r_dihedral_angle_4_deg	12.948
r_dihedral_angle_1_deg	6.147
r_angle_refined_deg	1.697
r_angle_other_deg	1.037
r_chiral_restr	0.095
r_bond_refined_d	0.017
r_gen_planes_refined	0.008
r_bond_other_d	0.002
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2815
Nucleic Acid Atoms
Solvent Atoms	114
Heterogen Atoms	26

Software

Software
Software Name	Purpose
MolProbity	model building
PDB_EXTRACT	data extraction
SHELX	phasing
SHARP	phasing
XSCALE	data scaling
REFMAC	refinement
XDS	data reduction
SHELXD	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.