1A0D

XYLOSE ISOMERASE FROM BACILLUS STEAROTHERMOPHILUS

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6XIA	PDB ENTRY 6XIA

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5		VAPOR DIFFUSION FROM HANGING DROPS (18 DEG C): PROTEIN (A280 22) WAS IN 50 MM TRIS, 10 MM MNCL2, PH 7.5; RESERVOIR SOLUTION WAS 10% PEG, 100 MM LICL, 100 MM MES, PH 6.3; DROPS WERE FORMED FROM EQUAL PARTS OF PROTEIN AND RESERVOIR SOLUTIONS., pH 6.5, vapor diffusion - hanging drop

Crystal Properties
Matthews coefficient	Solvent content
2.7	45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.29	α = 90
b = 141.85	β = 90
c = 160.66	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	DIFFRACTOMETER	ENRAF-NONIUS FAST	DUAL SLITS, COLLIMATOR	1993-02-25	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ELLIOTT GX-21

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	3	33	89.6	0.1	7.1	1.7		35985			49.8

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)
	3	3.16	62.2		0.23	3.1	1.5

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	A POSTERIORI	PDB ENTRY 6XIA	3	20	35802	1775	89.3	0.193	0.193	0.209	RANDOM	19.1

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
x_dihedral_angle_d	22.3
x_angle_deg	1.6
x_improper_angle_d	1.26
x_bond_d	0.009
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3481
Nucleic Acid Atoms
Solvent Atoms	2
Heterogen Atoms	2

Software

Software
Software Name	Purpose
MADNES	data collection
CCP4	data reduction
X-PLOR	model building
X-PLOR	refinement
MADNES	data reduction
CCP4	data scaling
X-PLOR	phasing