Experiment: 5KTN

Crystal structure of Pyrococcus horikoshii quinolinate synthase (NadA) with bound dihydroxyacetone phosphate (DHAP) and Fe4S4 cluster

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1WZU	Crystal structure of Pyrococcus horikoshii NadA with bound malate and lacking Fe4S4 cluster (PDB entry 1WZU)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION		296	210 mM ammonium chloride, 8 - 15% polyethylene glycol 4000, and 40 mM HEPES, pH 5.5 - 7.5. DHAP was added to the protein solution to a final concentration of 7-10 mM

Crystal Properties
Matthews coefficient	Solvent content
1.85	33.42

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 47.303	α = 90
b = 52.522	β = 112.2
c = 55.544	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		2013-04-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-E	0.97925	APS	24-ID-E

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	1.34	35	99.4	0.047	19.3	3.6		56267

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	1.34	1.39	95.1		0.242	5	2.8

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-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	Crystal structure of Pyrococcus horikoshii NadA with bound malate and lacking Fe4S4 cluster (PDB entry 1WZU)	1.34	33.636	1.36	56248	2850	99.28	0.1243	0.1227	0.1546	0.157

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	18.151
f_angle_d	1.728
f_chiral_restr	0.084
f_bond_d	0.012
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2419
Nucleic Acid Atoms
Solvent Atoms	522
Heterogen Atoms	21

Software

Software
Software Name	Purpose
PHENIX	refinement
PHENIX	phasing
HKL-2000	data reduction
HKL-2000	data scaling