3MB2

Kinetic and Structural Characterization of a Heterohexamer 4-Oxalocrotonate Tautomerase from Chloroflexus aurantiacus J-10-fl: Implications for Functional and Structural Diversity in the Tautomerase Superfamily

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.4	293	0.25 M (NH4)2SO4 and 4% PEG 4000, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.79	67.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 106.062	α = 90
b = 106.062	β = 90
c = 109.961	γ = 120

Symmetry
Space Group	P 31

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	MARMOSAIC 225 mm CCD		2008-04-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-BM	1	APS	22-BM

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	2.41	91.85	99.6	0.072	27.6	6	49937	49737			32.143

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	2.414	2.477	88.69		0.377	4.1	5.2	3293

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 1S0Y Alpha Subunit PDB ENTRY 1MWW Beta Subunit	2.41	91.85	49737	2670	98.58	0.20556	0.20324	0.25018	RANDOM	32.143

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]
0.44	0.22		0.44		-0.67

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.881
r_dihedral_angle_3_deg	22.167
r_dihedral_angle_4_deg	20.149
r_dihedral_angle_1_deg	6.529
r_scangle_it	5.1
r_scbond_it	3.326
r_angle_refined_deg	2.226
r_mcangle_it	1.721
r_mcbond_it	0.928
r_chiral_restr	0.164

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.881
r_dihedral_angle_3_deg	22.167
r_dihedral_angle_4_deg	20.149
r_dihedral_angle_1_deg	6.529
r_scangle_it	5.1
r_scbond_it	3.326
r_angle_refined_deg	2.226
r_mcangle_it	1.721
r_mcbond_it	0.928
r_chiral_restr	0.164
r_bond_refined_d	0.026
r_gen_planes_refined	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5422
Nucleic Acid Atoms
Solvent Atoms	249
Heterogen Atoms	85

Software

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.