4F2D

Crystal Structure of Escherichia coli L-arabinose Isomerase (ECAI) complexed with Ribitol

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		298	PEG 3350, TRISODIUM CITRATE DIHYDRATE, Ribitol, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.46	50.02

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 116.472	α = 90
b = 116.472	β = 90
c = 214.81	γ = 120

Symmetry
Space Group	P 32 2 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 QUANTUM 315	MIRRORS	2006-07-18	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	MAR CCD 165 mm	MIRRORS		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X29A	1.1	NSLS	X29A
2	SYNCHROTRON	NSLS BEAMLINE X3A	0.979	NSLS	X3A

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	2.3	20	99.5	0.073	22.3	6.6		85584	2	2	52

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	2AJT	2.3	20	70507	3746	98.31	0.21401	0.21184	0.25505	RANDOM	28.847

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]
1.37	0.68		1.37		-2.05

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	42.407
r_dihedral_angle_2_deg	36.349
r_dihedral_angle_4_deg	18.233
r_dihedral_angle_3_deg	15.9
r_dihedral_angle_1_deg	9.187
r_rigid_bond_restr	8.025
r_sphericity_bonded	7.585
r_angle_other_deg	1.218
r_angle_refined_deg	1.077
r_chiral_restr	0.062
r_bond_refined_d	0.006
r_gen_planes_refined	0.004
r_bond_other_d	0.003
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11522
Nucleic Acid Atoms
Solvent Atoms	221
Heterogen Atoms	37

Software

Software
Software Name	Purpose
CBASS	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling