1GOQ

Thermostable xylanase I from Thermoascus aurantiacus - Room temperature xylobiose complex

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7		HANGING DROPS CONTAINING 1:1 RATIO OF 20-30 MG/ML PROTEIN SOLUTION AND RESERVOIR SOLUTION (12 % TO 25 % PEG 6,000). THE CRYSTAL WAS SOAKED IN 0.5 M XYLOBIOSE, pH 7.00

Crystal Properties
Matthews coefficient	Solvent content
2.02	32.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.06	α = 90
b = 59.56	β = 110.8
c = 51.13	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	IMAGE PLATE	R-AXIS			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE

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	1.8	30	86	0.17		6.4		20709

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	1.8	1.83	37.9		0.338		4.3

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	FOURIER SYNTHESIS	THROUGHOUT	1GOK	1.8	5	19293	1922	84.3	0.167	0.167	0.212	RANDOM	18.8

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]
1.266		0.186	-0.115		-1.151

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	24
x_scangle_it	3.728
x_scbond_it	2.647
x_mcangle_it	2.116
x_mcbond_it	1.494
x_angle_deg	1.3
x_improper_angle_d	0.7
x_bond_d	0.0065
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

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2312
Nucleic Acid Atoms
Solvent Atoms	131
Heterogen Atoms	58

Software

Software
Software Name	Purpose
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing