6I0R

Structure of quinolinate synthase in complex with 5-mercaptopyridine-2,3-dicarboxylic acid

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6F48

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.7	298	PEG33500, dioxane, Na2HPO4, MES, anaerobic

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.9	α = 90
b = 48.5	β = 107.1
c = 60.5	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	PIXEL	DECTRIS PILATUS3 S 6M		2017-06-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID30B	1.00394	ESRF	ID30B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	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	2.1	37.16	95.3	0.143	0.171	0.091	0.982	8.5	3		17011

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.17	96.7		0.887	1.064	0.576	0.536		2.9

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	6F48	2.1	37.16	16177	830	94.69	0.1999	0.1978	0.2393	RANDOM	43.712

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]
-0.82		-0.77	0.18		0.94

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.634
r_dihedral_angle_4_deg	19.537
r_dihedral_angle_3_deg	16.413
r_dihedral_angle_1_deg	5.499
r_angle_other_deg	1.558
r_angle_refined_deg	1.543
r_chiral_restr	0.105
r_bond_other_d	0.016
r_bond_refined_d	0.01
r_gen_planes_refined	0.005

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.634
r_dihedral_angle_4_deg	19.537
r_dihedral_angle_3_deg	16.413
r_dihedral_angle_1_deg	5.499
r_angle_other_deg	1.558
r_angle_refined_deg	1.543
r_chiral_restr	0.105
r_bond_other_d	0.016
r_bond_refined_d	0.01
r_gen_planes_refined	0.005
r_gen_planes_other	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2397
Nucleic Acid Atoms
Solvent Atoms	110
Heterogen Atoms	21

Software

Software
Software Name	Purpose
XDS	data reduction
Aimless	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.