3P47

Crystal structure of Entamoeba histolytica Serine acetyltransferase 1 in complex with L-cysteine

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	289	Peg 2000, NaCl, Glycerol, Tris, L-cysteine, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
2.09	41.15

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 110.047	α = 90
b = 110.047	β = 90
c = 64.002	γ = 120

Symmetry
Space Group	H 3

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	MARMOSAIC 225 mm CCD		2009-06-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM14	1.0337	ESRF	BM14

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	1.78	50	97.1	0.073	12.5	5.5		26982

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	1.78	1.84	80.8		0.296		4.5	2235

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	1.78	30	26973	1361	97.08	0.1935	0.1908	0.2454	RANDOM	26.3688

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]
-1.57	-0.78		-1.57		2.35

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.215
r_dihedral_angle_4_deg	15.647
r_dihedral_angle_3_deg	13.331
r_dihedral_angle_1_deg	6.625
r_scangle_it	3.457
r_scbond_it	2.439
r_mcangle_it	1.519
r_angle_refined_deg	1.513
r_mcbond_it	0.913
r_chiral_restr	0.101

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.215
r_dihedral_angle_4_deg	15.647
r_dihedral_angle_3_deg	13.331
r_dihedral_angle_1_deg	6.625
r_scangle_it	3.457
r_scbond_it	2.439
r_mcangle_it	1.519
r_angle_refined_deg	1.513
r_mcbond_it	0.913
r_chiral_restr	0.101
r_bond_refined_d	0.016
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2148
Nucleic Acid Atoms
Solvent Atoms	161
Heterogen Atoms	12

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection

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.