2B42

Crystal structure of the Triticum xylanse inhibitor-I in complex with bacillus subtilis xylanase

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	277	0.22 M ammonium sulphate, 0.1 M sodium acetate buffer, 25 % (w/v) polyethylene glycol 4000, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.6	51.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 107.89	α = 90
b = 95.34	β = 122.24
c = 69.31	γ = 90

Symmetry
Space Group	C 1 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 4		2002-11-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-1	0.934	ESRF	ID14-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.5	29.36	88.1			20136	18166	1.41	0.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.5	2.64	98

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.5	29.36	18166	18166	1968	100	0.18814	0.18814	0.18265	0.23977	RANDOM	37.362

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]
0.41		1.32	0.91		0.09

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	7.171
r_scangle_it	2.473
r_scbond_it	1.455
r_angle_refined_deg	1.425
r_mcangle_it	1.285
r_angle_other_deg	0.808
r_mcbond_it	0.693
r_symmetry_vdw_other	0.269
r_symmetry_hbond_refined	0.258
r_nbd_other	0.242
r_nbd_refined	0.201
r_symmetry_vdw_refined	0.149
r_xyhbond_nbd_refined	0.143
r_chiral_restr	0.083
r_nbtor_other	0.083
r_bond_refined_d	0.013
r_gen_planes_refined	0.005
r_bond_other_d	0.002
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4047
Nucleic Acid Atoms
Solvent Atoms	65
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
SCALA	data scaling
CNS	refinement
MOSFLM	data reduction
CCP4	data scaling
CNS	phasing