2H2W

Crystal structure of Homoserine O-succinyltransferase (EC 2.3.1.46) (Homoserine O-transsuccinylase) (HTS) (tm0881) from THERMOTOGA MARITIMA at 2.52 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION,SITTING DROP,NANODROP	8	293	10.0% iso-Propanol, 0.1M Imidazole pH 8.0, VAPOR DIFFUSION,SITTING DROP,NANODROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.88	56.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.609	α = 90
b = 72.609	β = 90
c = 126.913	γ = 120

Symmetry
Space Group	P 31 2 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	ADSC QUANTUM 210		2003-09-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.0000	ALS	8.2.1

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	2.52	42.3	99.9	0.046	18.5	10.98		13643			70.22

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	2.52	2.61	99.7	99.7	0.387	6.1

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 (All)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2GHR	2.52	42.3	12573	613	92.36	0.194	0.19	0.274	RANDOM	44.358

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]
1.98	0.99		1.98		-2.97

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.477
r_dihedral_angle_4_deg	17.047
r_dihedral_angle_3_deg	14.03
r_dihedral_angle_1_deg	6.054
r_scangle_it	4.237
r_scbond_it	3.013
r_mcangle_it	2.749
r_mcbond_it	1.859
r_angle_refined_deg	1.211
r_angle_other_deg	0.62
r_mcbond_other	0.44
r_symmetry_vdw_other	0.282
r_symmetry_hbond_refined	0.262
r_nbd_refined	0.228
r_nbd_other	0.217
r_nbtor_refined	0.202
r_xyhbond_nbd_refined	0.199
r_nbtor_other	0.093
r_symmetry_vdw_refined	0.093
r_chiral_restr	0.07
r_bond_refined_d	0.009
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2373
Nucleic Acid Atoms
Solvent Atoms	16
Heterogen Atoms

Software

Software
Software Name	Purpose
PHASER	phasing
MolProbity	model building
REFMAC	refinement
SCALEPACK	data scaling
PDB_EXTRACT	data extraction
DENZO	data reduction