3H2A

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
2.73	54.95

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.513	α = 90
b = 97.513	β = 90
c = 261.643	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		2008-12-15	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	2.4	47.93	90.2	0.087	33.9	11.1		27556

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	2.4	2.49	54.1		0.171	11.5	8.7	1608

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	2.4	47.93	27230	1354	91.52	0.22801	0.22543	0.28037	RANDOM	58.905

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]
3.64	1.82		3.64		-5.46

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.778
r_dihedral_angle_4_deg	20.537
r_dihedral_angle_3_deg	15.787
r_dihedral_angle_1_deg	5.542
r_scangle_it	2.544
r_scbond_it	1.65
r_angle_refined_deg	1.302
r_mcangle_it	1.032
r_mcbond_it	0.716
r_nbtor_refined	0.3
r_symmetry_vdw_refined	0.275
r_nbd_refined	0.204
r_xyhbond_nbd_refined	0.128
r_symmetry_hbond_refined	0.128
r_chiral_restr	0.087
r_bond_refined_d	0.012
r_gen_planes_refined	0.004
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	4139
Nucleic Acid Atoms
Solvent Atoms	105
Heterogen Atoms	59

Software

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