7P0N

Crystal structure of L-Trp/Indoleamine 2,3-dioxygenagse 1 (hIDO1) complex with the JK-loop refined in the open conformation

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.4	298	14.5% PEG 3350 0.1M Phosphate buffer 2mM L-Trp Protein buffer : Hepes 5mM, 200mM NaCl, 5mM DTT Cryoprotection: 20 mM sodium dithionite, 20% glycerol

Crystal Properties
Matthews coefficient	Solvent content
2.81	56.72

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 81.36	α = 90
b = 114.57	β = 90
c = 220.98	γ = 90

Symmetry
Space Group	P 21 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	100	PIXEL	DECTRIS EIGER2 X 9M		2020-07-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SOLEIL BEAMLINE PROXIMA 2	0.98012	SOLEIL	PROXIMA 2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	49.29	99.34	0.995	6.7	7		71786			52.26

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.504	2.593	97.88		0.606	0.95

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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	7A62	2.5	49.29	1.34	71579	3582	99.37	0.2182	0.2151	0.2788	58.73

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	19.2593
f_angle_d	1.1214
f_chiral_restr	0.053
f_bond_d	0.0088
f_plane_restr	0.0084

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11782
Nucleic Acid Atoms
Solvent Atoms	492
Heterogen Atoms	429

Software

Software
Software Name	Purpose
PHENIX	refinement
MxCuBE	data collection
Coot	model building
PHASER	phasing
XDS	data reduction
XDS	data scaling

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 R01GM133198.