1AOE

CANDIDA ALBICANS DIHYDROFOLATE REDUCTASE COMPLEXED WITH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE (NADPH) AND 1,3-DIAMINO-7-(1-ETHYEPROPYE)-7H-PYRRALO-[3,2-F]QUINAZOLINE (GW345)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1AI9	CANDIDA ALBICANS DHFR (PDB ENTRY 1AI9)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		A THREE-FOLD EXCESS OF GW345 AND THREE-FOLD EXCESS OF NADPH WAS ADDED TO THE C. ALBICANS DHFR SOLUTION AND LET STAND 277K OVERNIGHT. 17-20 MG/ML C. ALBICANS DHFR IN 50 UM GW345, 50 UM NADPH, 20 MM KMES, 1 MM DTT, PH 6.5 WAS MIXED WITH AN EQUAL PART OF 26 - 34% PEG-3350, THE RESERVOIR SOLUTION.

Crystal Properties
Matthews coefficient	Solvent content
2.27	43

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 77.91	α = 90
b = 67.28	β = 93.07
c = 38.49	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	295	AREA DETECTOR	SIEMENS	MONOCHROMATOR	1987-08-09	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ELLIOTT GX-21

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	1.6		91.7	0.0458		3.06		45668		2

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)
	1.6	1.7	53		0.235	3.06	1.59

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	DIRECT REPLACEMENT	CANDIDA ALBICANS DHFR (PDB ENTRY 1AI9)	1.6	10	2	45668	41400		91.7	0.155

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	31
p_staggered_tor	14.9
p_scangle_it	9.426
p_scbond_it	7.783
p_mcangle_it	5.537
p_mcbond_it	4.6
p_planar_tor	3.8
p_chiral_restr	0.241
p_singtor_nbd	0.165
p_multtor_nbd	0.145
p_xyhbond_nbd	0.127
p_planar_d	0.036
p_angle_d	0.031
p_bond_d	0.02
p_plane_restr	0.02
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	3182
Nucleic Acid Atoms
Solvent Atoms	353
Heterogen Atoms	136

Software

Software
Software Name	Purpose
PROFFT	refinement
XENGEN	data reduction
XENGEN	data scaling