Experiment: 1M78

CANDIDA ALBICANS DIHYDROFOLATE REDUCTASE COMPLEXED WITH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE (NADPH) AND 5-CHLORYL-2,4,6-QUINAZOLINETRIAMINE (GW1225)

X-RAY DIFFRACTION

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	LIQUID DIFFUSION	7.5	277	dihydro-nicotinamide-adenine-dinucleotide phosphate (NADPH), 5-chloryl-2,4,6-quinazolinetriamine (GW1225), PEG-3350, Potassium 4-morphilineethanesulfonic acid (MES), dithiothreitol (DTT), pH 7.50, LIQUID DIFFUSION, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.27	43

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 76.91	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	293	AREA DETECTOR	XENTRONICS	Huber graphite MONOCHROMATOR	1988-03-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ELLIOTT GX-21	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.71	50	91.5	0.0537	0.0537	17.6	3.118		37244		-3	34.35

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.71	1.81	60.55		0.2337	0.2337	2.1	1.83	4052

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	DIRECT REPLACEMENT	CANDIDA ALBICANS DHFR (PDB ENTRY 1AI9)	1.71	10	-3	2	37249	32743		91.5	0.1557	0.1557	0.1557	0.1559

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	30.8
p_staggered_tor	14.7
p_scangle_it	7.612
p_scbond_it	6.119
p_mcangle_it	5.207
p_mcbond_it	4.628
p_planar_tor	3.7
p_chiral_restr	0.247
p_singtor_nbd	0.164
p_multtor_nbd	0.145

RMS Deviations
Key	Refinement Restraint Deviation
p_transverse_tor	30.8
p_staggered_tor	14.7
p_scangle_it	7.612
p_scbond_it	6.119
p_mcangle_it	5.207
p_mcbond_it	4.628
p_planar_tor	3.7
p_chiral_restr	0.247
p_singtor_nbd	0.164
p_multtor_nbd	0.145
p_xyhbond_nbd	0.145
p_planar_d	0.036
p_angle_d	0.031
p_bond_d	0.02
p_plane_restr	0.019
p_hb_or_metal_coord
p_xhyhbond_nbd
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3182
Nucleic Acid Atoms
Solvent Atoms	348
Heterogen Atoms	124

Software

Software
Software Name	Purpose
X-GEN	data reduction
FRODO	model building
PROFFT	refinement
X-GEN	data scaling