3AEP

Reaction intermediate structure of Entamoeba histolytica methionine gamma-lyase 1 containing alpha-amino-alpha, beta-butenoic acid-pyridoxal-5'-phosphate

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3ACZ	PDB ENTRY 3ACZ

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.6	277	1.8M (NH4)2SO4, 0.1M cacodylate buffer, 0.1M Li3(C3H5O(COO)3), 0.1mM pyridozxal 5'-phosphate, pH 6.6, vapor diffusion, sitting drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.8	56.12

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 99.215	α = 90
b = 85.359	β = 101.99
c = 114.649	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	Bruker DIP-6040		2008-05-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL44XU	0.900	SPring-8	BL44XU

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	2.28	50	99.9	0.092	9.529	3.8		85091

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)
	2.28	2.36	99.4		0.394	1.953	3.6	8424

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	PDB ENTRY 3ACZ	2.28	39.89	84948	4257	99.41	0.158	0.156	0.198	RANDOM	32.156

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]
-0.03		0.01	0.04		-0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.361
r_dihedral_angle_3_deg	17.084
r_dihedral_angle_4_deg	14.688
r_dihedral_angle_1_deg	5.813
r_scangle_it	3.763
r_scbond_it	2.346
r_angle_refined_deg	1.535
r_mcangle_it	1.261
r_mcbond_it	0.65
r_chiral_restr	0.107

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.361
r_dihedral_angle_3_deg	17.084
r_dihedral_angle_4_deg	14.688
r_dihedral_angle_1_deg	5.813
r_scangle_it	3.763
r_scbond_it	2.346
r_angle_refined_deg	1.535
r_mcangle_it	1.261
r_mcbond_it	0.65
r_chiral_restr	0.107
r_bond_refined_d	0.015
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11752
Nucleic Acid Atoms
Solvent Atoms	694
Heterogen Atoms	124

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	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 R01GM157729.