2IVB

SITE DIRECTED MUTAGENESIS OF KEY RESIDUES INVOLVED IN THE CATALYTIC MECHANISM OF CYANASE

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1DW9	PDB ENTRY 1DW9

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.3		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.

Crystal Properties
Matthews coefficient	Solvent content
2.67	54

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 76.504	α = 69.86
b = 80.601	β = 71.38
c = 82.108	γ = 66.43

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	ADSC CCD	MIRRORS		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 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	1.95	75	95.7	0.04	17.3	2		115164

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.95	2.05	84.6		0.2	5.3	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	1.95	75.38	109393	5769	96.2	0.148	0.145	0.207	RANDOM	17.63

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]
0.82	0.85	-1.24	-0.62	0.06	-0.12

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.174
r_dihedral_angle_3_deg	13.857
r_dihedral_angle_4_deg	8.797
r_dihedral_angle_1_deg	6.512
r_scangle_it	3.525
r_scbond_it	2.609
r_angle_refined_deg	1.675
r_mcangle_it	1.512
r_mcbond_it	1.329
r_angle_other_deg	1.056
r_symmetry_vdw_other	0.262
r_nbd_refined	0.246
r_symmetry_hbond_refined	0.235
r_nbd_other	0.215
r_symmetry_vdw_refined	0.214
r_xyhbond_nbd_refined	0.209
r_nbtor_refined	0.171
r_chiral_restr	0.11
r_nbtor_other	0.084
r_bond_refined_d	0.019
r_gen_planes_refined	0.007
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11970
Nucleic Acid Atoms
Solvent Atoms	2728
Heterogen Atoms	105

Software

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