1XS4

dCTP deaminase from Escherichia coli- E138A mutant enzyme in complex with dCTP

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1OGH	PDB ENTRY 1OGH

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	298	PEG 400, magnesium chloride, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.18	44

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.272	α = 90
b = 97.882	β = 109.23
c = 95.116	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	100	CCD	MARRESEARCH	Vertically focusing cylindrical mirror.	2003-09-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711	0.969	MAX II	I711

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	2.53	30	98.5	0.052	25.6	3.7	37005	37005

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)
	2.53	2.59	78.2		0.092	12.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	combination of SAD and MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1OGH	2.53	30	36399	34581	1818	99.44	0.18689	0.18479	0.22541	RANDOM	19.611

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]
0.85		-0.08	0.3		-1.2

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.608
r_scangle_it	3.387
r_scbond_it	2.077
r_angle_refined_deg	1.66
r_mcangle_it	1.289
r_angle_other_deg	0.962
r_mcbond_it	0.679
r_symmetry_vdw_other	0.261
r_nbd_other	0.251
r_nbd_refined	0.199
r_xyhbond_nbd_refined	0.191
r_symmetry_hbond_refined	0.178
r_symmetry_vdw_refined	0.16
r_chiral_restr	0.095
r_nbtor_other	0.086
r_metal_ion_refined	0.075
r_bond_refined_d	0.02
r_gen_planes_refined	0.008
r_gen_planes_other	0.005
r_bond_other_d	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8952
Nucleic Acid Atoms
Solvent Atoms	229
Heterogen Atoms	174

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing