1DWK

STRUCTURE OF CYANASE WITH THE DI-ANION OXALATE BOUND AT THE ENZYME ACTIVE SITE

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.3		SELENOMETHIONINE LABELLED CRYSTALS WERE GROWN BY THE SITTING DROP METHOD OF VAPOUR DIFFUSION FROM 50% AMMONIUM SULPHATE SOLUTIONS BUFFERED WITH 50MM NAKPO4, PH = 7.3, AND IN THE PRESENCE OF 50 MM TRIC/HCL, PH =7.3. MICROSEEDING WITH WILD-TYPE CRYSTALS PRODUCED CRYSTALS THAT GREW TO 0.1 X 0.2 X 0.7 MM**3 OVER 5-7 DAYS. CRYSTALS WERE THEN SOAKED FOR 4 HOURS IN 5 MM SODIUM OXALATE BEFORE BEING FLASH FROZEN.

Crystal Properties
Matthews coefficient	Solvent content
2.53	51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 76.33	α = 70.1
b = 80.93	β = 71.95
c = 82.13	γ = 66.42

Symmetry
Space Group	P 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	ARGONNE APS-1	MIRROR	1998-11-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID		APS	19-ID

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	1.65	20	95.4	0.047	26.4	2.3		190231			13.4

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	1.65	1.68	79.4		0.171	3.9	1.9

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1DW9	1.65	20	190161	9561	95.4	0.138	0.146	0.181	RANDOM	15.8

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	20.2
p_staggered_tor	12.7
p_planar_tor	6.6
p_scangle_it	3.22
p_scbond_it	2.41
p_mcangle_it	1.79
p_mcbond_it	1.38
p_multtor_nbd	0.258
p_singtor_nbd	0.186
p_chiral_restr	0.155
p_planar_d	0.035
p_angle_d	0.032
p_bond_d	0.018
p_plane_restr	0.015
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_xyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11970
Nucleic Acid Atoms
Solvent Atoms	2464
Heterogen Atoms	145

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
CCP4	phasing