3H2N

Structural Studies of Pterin-Based Inhibitors of Dihydropteroate Synthase

X-RAY DIFFRACTION

---

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
2.79	55.93

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 98.314	α = 90
b = 98.314	β = 90
c = 263.122	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	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	48.32	91.5	0.049	47.5	11.9		27831

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	57.9		0.132	10.8	8.4	1701

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	48.32	26472	1279	87.27	0.21091	0.20797	0.26805	RANDOM	63.562

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]
3.07	1.53		3.07		-4.6

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.442
r_dihedral_angle_4_deg	20.322
r_dihedral_angle_3_deg	17.536
r_dihedral_angle_1_deg	6.349
r_scangle_it	4.513
r_scbond_it	2.972
r_angle_refined_deg	1.993
r_mcangle_it	1.875
r_mcbond_it	1.117
r_symmetry_vdw_refined	0.343
r_nbtor_refined	0.308
r_nbd_refined	0.222
r_symmetry_hbond_refined	0.132
r_xyhbond_nbd_refined	0.13
r_chiral_restr	0.121
r_bond_refined_d	0.023
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	4072
Nucleic Acid Atoms
Solvent Atoms	69
Heterogen Atoms	66

Software

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