6LHJ

Quadruple mutant (N51I+C59R+S108N+I164L) plasmodium falciparum dihydrofolate reductase-thymidylate synthase (PfDHFR-TS) complexed with C452 (compound 16) and NADPH

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROBATCH		298	0.1M sodium acetate, pH 4.6, 0.2M ammonium acetate, 25% PEG 4000

Crystal Properties
Matthews coefficient	Solvent content
2.56	51.99

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.277	α = 90
b = 156.483	β = 90
c = 164.449	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)	CC (Half)	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	10	99.1	0.994	15.7	5.7		58202

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.4	2.47			0.616

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	2.4	10	55641	2781	94.605	0.174	0.1728	0.2026	45.957

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]
2.96			-1.008		-1.951

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.812
r_dihedral_angle_4_deg	19.477
r_dihedral_angle_3_deg	17.129
r_lrange_it	8.779
r_lrange_other	8.779
r_dihedral_angle_1_deg	7.797
r_scangle_it	5.882
r_scangle_other	5.882
r_mcangle_it	5.55
r_mcangle_other	5.549
r_scbond_it	3.844
r_scbond_other	3.843
r_mcbond_it	3.655
r_mcbond_other	3.655
r_angle_refined_deg	1.696
r_chiral_restr_other	1.326
r_angle_other_deg	1.268
r_symmetry_xyhbond_nbd_refined	0.278
r_xyhbond_nbd_refined	0.249
r_nbd_other	0.244
r_nbd_refined	0.21
r_symmetry_nbd_other	0.194
r_symmetry_nbd_refined	0.194
r_nbtor_refined	0.176
r_symmetry_xyhbond_nbd_other	0.176
r_symmetry_nbtor_other	0.079
r_chiral_restr	0.077
r_bond_refined_d	0.01
r_gen_planes_refined	0.008
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9036
Nucleic Acid Atoms
Solvent Atoms	708
Heterogen Atoms	188

Software

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