3AEO

Reaction intermediate structure of Entamoeba histolytica methionine gamma-lyase 1 containing methionine alpha, beta-enamine-pyridoxamine-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	1.8 M (NH4)2SO4, 0.1 M cacodylate buffer, 0.1 M Li3(C3H5O(COO)3), 0.1 mM pyridozxal 5'-phosphate, pH 6.6, vapor diffusion, sitting drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.83	56.51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 99.057	α = 90
b = 85.703	β = 101.39
c = 115.135	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	MARMOSAIC 225 mm CCD		2008-07-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL41XU	1.00000	SPring-8	BL41XU

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	2.15	50	99.9	0.089	13.471	3.8		102025

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)
	2.15	2.23	100		0.396	3.487	3.8	10126

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	2.15	39.9	101969	5110	98.48	0.155	0.153	0.194	RANDOM	36.66

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]
0.04		-0.19	0.03		-0.15

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.982
r_dihedral_angle_3_deg	16.377
r_dihedral_angle_4_deg	16.185
r_dihedral_angle_1_deg	5.77
r_scangle_it	3.753
r_scbond_it	2.352
r_angle_refined_deg	1.484
r_mcangle_it	1.291
r_mcbond_it	0.697
r_chiral_restr	0.115

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.982
r_dihedral_angle_3_deg	16.377
r_dihedral_angle_4_deg	16.185
r_dihedral_angle_1_deg	5.77
r_scangle_it	3.753
r_scbond_it	2.352
r_angle_refined_deg	1.484
r_mcangle_it	1.291
r_mcbond_it	0.697
r_chiral_restr	0.115
r_bond_refined_d	0.016
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11752
Nucleic Acid Atoms
Solvent Atoms	736
Heterogen Atoms	128

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.