3HD8

Crystal structure of the Triticum aestivum xylanase inhibitor-IIA 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	18% (w/v) polyethylene glycol 4000, 0.18M ammonium sulfate, 0.1M sodium acetate buffer , pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.53	51.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 77.351	α = 90
b = 60.3	β = 101.49
c = 134.187	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	100	CCD	MAR CCD 165 mm		2005-11-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7A	0.811	EMBL/DESY, HAMBURG	BW7A

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	2.38	50	97.5	0.076	7.7		48031	45604

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.38	2.44	97.5		0.341	3.8		955

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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 ENTRIES 1T6E for chains A and C; 1C5H for the chains B and D	2.39	38.52	45713	44570	2427	98.77	0.22601	0.22344	0.27459	RANDOM	38.726

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]
0.58		1.15	0.58		-0.71

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	9.191
r_scangle_it	4.31
r_scbond_it	2.631
r_angle_refined_deg	2.237
r_mcangle_it	1.951
r_angle_other_deg	1.222
r_mcbond_it	1.063
r_symmetry_vdw_other	0.351
r_symmetry_vdw_refined	0.347
r_nbd_other	0.265
r_nbd_refined	0.242
r_xyhbond_nbd_refined	0.213
r_chiral_restr	0.128
r_nbtor_other	0.1
r_symmetry_hbond_refined	0.068
r_bond_refined_d	0.027
r_gen_planes_refined	0.01
r_gen_planes_other	0.009
r_bond_other_d	0.004
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8240
Nucleic Acid Atoms
Solvent Atoms	42
Heterogen Atoms

Software

Software
Software Name	Purpose
HKL-2000	data collection
CNS	refinement
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing