6W04

Crystal structure of HAD hydrolase, family IA, variant 3 from Entamoeba histolytica HM-1:IMSS

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	290	24.5 mg/mL EnhiA.01283.a.AE1.PS38608 (labeled as BrabA.17285.c.AE2) in 3 mM magnesium chloride against MCSG1_A2-C2 optimization screen, condition g3 (200 mM ammonium sulfate, 26% w/v PEG3350, 100 mM Bis-Tris-HCl, pH 5.4), cryoprotectant: 15% ethylene glycol + 3 mM magnesium chloride in two steps, tray: 314701g3, puck wrw2-2, for experimental phasing, a crystal from MCSG1_A2-C2 optimization screen, condition e7 (300 mM lithium sulfate, 24% w/v PEG3350, 100 mM Bis-Tris-HCl, pH 5.0) was soaked for 20 seconds in 90% reservoir + 10% 5 M sodium iodide in ethylene glycol, followed by another 20-second soak in 80% reservoir + 20% 5 M sodium iodide in ethylene glycol, vitrified in liquid nitrogen, tray 314703e7, puck ynn3-8

Crystal Properties
Matthews coefficient	Solvent content
2.52	51.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.91	α = 90
b = 100.91	β = 90
c = 45.24	γ = 120

Symmetry
Space Group	P 63

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	RAYONIX MX-300		2020-02-05	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	RIGAKU SATURN 944+		2020-02-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.97872	APS	21-ID-F
2	ROTATING ANODE	RIGAKU FR-E+ SUPERBRIGHT	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim 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	1.95	50	100	0.063	0.068	0.998	18.53	7.521		19394			40.227

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.95	2	100		0.494	0.53	0.9	3.8	7.568

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	FREE R-VALUE	1.95	33.03	1.37	19390	1876	99.97	0.1629	0.1579	0.2107	0	42.11

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	17.0766
f_angle_d	0.8897
f_chiral_restr	0.0575
f_bond_d	0.0089
f_plane_restr	0.0051

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1763
Nucleic Acid Atoms
Solvent Atoms	151
Heterogen Atoms	10

Software

Software
Software Name	Purpose
XDS	data reduction
XSCALE	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
PHASER	phasing
ARP/wARP	model building
Coot	model building

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.