6LH9

Quadruple mutant (N51I+C59R+S108N+I164L) plasmodium falciparum dihydrofolate reductase-thymidylate synthase (PfDHFR-TS) complexed with compound 46 and NADPH

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROBATCH	4.6	298	0.1M sodium acetate, pH 4.6, 0.2M ammonium acetate, 25% PEG4000

Crystal Properties
Matthews coefficient	Solvent content
2.708	54.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.703	α = 90
b = 155.878	β = 90
c = 164.8	γ = 90

Symmetry
Space Group	P 21 21 21

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	Nonius Kappa CCD		2003-10-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR591	1.5418

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	2.64	43.951	90.6	0.103	10.8	5.08		39860

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	2.64	2.75			0.5

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	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	NONE	4DP3	2.644	43.951	39860	1980	89.708	0.256	0.2518	0.3319	51.836

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]
27.958			-5.781		-22.177

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.991
r_dihedral_angle_4_deg	18.94
r_dihedral_angle_3_deg	18.485
r_lrange_other	10.101
r_lrange_it	10.1
r_dihedral_angle_1_deg	8.28
r_mcangle_it	7.379
r_mcangle_other	7.379
r_scangle_it	7.14
r_scangle_other	7.139
r_mcbond_it	4.701
r_mcbond_other	4.7
r_scbond_it	4.547
r_scbond_other	4.547
r_angle_other_deg	2.313
r_angle_refined_deg	1.797
r_nbd_other	0.27
r_symmetry_nbd_refined	0.219
r_symmetry_nbd_other	0.216
r_nbd_refined	0.209
r_xyhbond_nbd_refined	0.181
r_nbtor_refined	0.175
r_symmetry_xyhbond_nbd_other	0.115
r_symmetry_xyhbond_nbd_refined	0.102
r_chiral_restr	0.092
r_symmetry_nbtor_other	0.072
r_bond_other_d	0.035
r_gen_planes_other	0.026
r_gen_planes_refined	0.013
r_bond_refined_d	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8818
Nucleic Acid Atoms
Solvent Atoms	89
Heterogen Atoms	150

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
HKL-2000	data scaling
MOLREP	phasing