3H23

Structural Studies of Pterin-Based Inhibitors of Dihydropteroate Synthase

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1TX0	PDB entry 1TX0

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9	291	LITHIUM SULFATE, propane, Bis-Tris, pH 9, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.71	54.61

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 96.793	α = 90
b = 96.793	β = 90
c = 263.593	γ = 120

Symmetry
Space Group	P 62 2 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	CCD	MARRESEARCH		2008-10-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1.0	APS	22-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	2.1	47.6	96.5	0.094	29.7	13.5		41961

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.18	89.6		0.347	2	6.4	3798

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 1TX0	2.2	47.6	37039	1859	97.31	0.22031	0.21725	0.27854	RANDOM	52.589

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]
2.46	1.23		2.46		-3.69

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.491
r_dihedral_angle_3_deg	18.273
r_dihedral_angle_4_deg	16.424
r_dihedral_angle_1_deg	6.462
r_scangle_it	4.601
r_scbond_it	3.197
r_angle_refined_deg	1.909
r_mcangle_it	1.822
r_mcbond_it	1.161
r_nbtor_refined	0.306
r_symmetry_vdw_refined	0.264
r_nbd_refined	0.22
r_symmetry_hbond_refined	0.209
r_xyhbond_nbd_refined	0.173
r_chiral_restr	0.134
r_bond_refined_d	0.021
r_gen_planes_refined	0.008
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4152
Nucleic Acid Atoms
Solvent Atoms	215
Heterogen Atoms	88

Software

Software
Software Name	Purpose
SERGUI	data collection
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling