Experiment: 2EGU

Crystal structure of O-acetylserine sulfhydrase from Geobacillus kaustophilus HTA426

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1Z7W	1Z7W.pdb

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.3	293	100mM MES-NaOH, 50mM MgCl2, 27.5% PEG 4000, pH 6.3, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.55	51.68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.25	α = 90
b = 72.25	β = 90
c = 127.07	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS V	mirrors	2006-12-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL45XU	0.9794	SPring-8	BL45XU

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	1.9	40	99.9	0.107	36.86	14.3	27260	27236

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	1.9	1.97	100		0.529	5.22	14.6	2654

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1Z7W.pdb	1.9	39.81	27236	26955	1314	98.8	0.201	0.201	0.2016	0.219	0.2187	random	28.574

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]
-1.982			-1.982		3.963

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.07442
c_angle_deg	1.35335
c_improper_angle_d	0.94017
c_bond_d	0.006398

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2006
Nucleic Acid Atoms
Solvent Atoms	246
Heterogen Atoms

Software

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