Experiment: 5IKY

Apo structure of Obc1, a bifunctional enzyme for quorum sensing-dependent oxalogenesis

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4NNA

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	295	0.1M HEPES pH 7.0, 1M Sodium citrate tribasic

Crystal Properties
Matthews coefficient	Solvent content
5.23	76.47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 230.81	α = 90
b = 230.81	β = 90
c = 253.732	γ = 120

Symmetry
Space Group	H 3 2

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 270		2015-04-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PAL/PLS BEAMLINE 7A (6B, 6C1)	0.9793	PAL/PLS	7A (6B, 6C1)

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	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	2.5	49.19	99.7	0.141	0.996	10.2	9.1		88989			57.13

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	2.5	2.54	100		1.654		9.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	4NNA	2.5	38.767	1.34	88922	1998	99.61	0.1986	0.1979	0.2068	0.2273	0.2073	77.9219

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	12.79
f_angle_d	0.722
f_chiral_restr	0.024
f_plane_restr	0.004
f_bond_d	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7835
Nucleic Acid Atoms
Solvent Atoms	200
Heterogen Atoms	1

Software

Software
Software Name	Purpose
MOSFLM	data collection
Aimless	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
iMOSFLM	data reduction
PHENIX	phasing