7RIZ

Crystal structure of RPA3624, a beta-propeller lactonase from Rhodopseudomonas palustris, with active-site bound 2-hydroxyquinoline

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	293	Crystals were grown in a MRC SD2 plate set with a TTP Labtech Mosquito crystallization robot. Protein sample at 9.2mg/mL was inclubated with 5mM 2-hydroxyquinoline at 293K for 1 hour prior to plate setup. The crystal providing the refinement data set was grown by mixing 200 nL protein-2HQ solution with 100 nL reservoir solution, 24% PEG3350, 0.2 M CaCl2, 0.1M bistris pH 6.5. Crystals were cryoprotected by soaking in reservoir solution supplemented to 30% PEG3350 and direct immersion in liquid nitrogen

Crystal Properties
Matthews coefficient	Solvent content
2.06	40.26

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.558	α = 90
b = 48.558	β = 90
c = 199.122	γ = 120

Symmetry
Space Group	P 32 2 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 EIGER X 9M		2020-07-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-D	1.127230	APS	21-ID-D

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	1.71	33.19	99.31	0.1008	0.1036	0.02366	0.999	17.31	19.5		30590			27.74

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	1.71	1.771	98.19		1.421	1.458	0.323	0.964	1.65	20.2

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	7RIS	1.71	33.19	1.34	30523	1995	99.18	0.1794	0.1773	0.2096	37.04

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	13.3142
f_angle_d	1.0297
f_chiral_restr	0.0695
f_bond_d	0.0117
f_plane_restr	0.0101

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2288
Nucleic Acid Atoms
Solvent Atoms	202
Heterogen Atoms	13

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	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.