1HFQ

COMPARISON OF TERNARY CRYSTAL COMPLEXES OF HUMAN DIHYDROFOLATE REDUCTASE WITH NADPH AND A CLASSICAL ANTITUMOR FUROPYRIMDINE

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.54	48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.12	α = 90
b = 87.12	β = 90
c = 77.014	γ = 120

Symmetry
Space Group	H 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray		IMAGE PLATE	RIGAKU		1993-05-10

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

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	1.9	8	78	0.041		3.09		13350		2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION		2.1				0.175		30.42

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]

RMS Deviations
Key	Refinement Restraint Deviation
p_transverse_tor	21.6
p_staggered_tor	18.4
p_planar_tor	3.6
p_scangle_it	2.399
p_mcangle_it	2.003
p_scbond_it	1.609
p_mcbond_it	1.539
p_multtor_nbd	0.277
p_xyhbond_nbd	0.224
p_chiral_restr	0.218
p_singtor_nbd	0.197
p_planar_d	0.062
p_angle_d	0.058
p_bond_d	0.025
p_plane_restr	0.021
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1497
Nucleic Acid Atoms
Solvent Atoms	51
Heterogen Atoms	80

Software

Software
Software Name	Purpose
PROFFT	refinement
R-AXIS	data reduction