1X38

crystal structure of barley beta-D-glucan glucohydrolase isoenzyme exo1 in complex with gluco-phenylimidazole

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1LQ2	PDB ENTRY 1LQ2

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	277	AMMONIUM SULPHATE, PEG 400, SODIUM ACETATE, HEPES-NAOH, pH 7.00, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.542479	65.278549

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.558	α = 90
b = 100.558	β = 90
c = 182.414	γ = 90

Symmetry
Space Group	P 43 21 2

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	MARRESEARCH	bent cylindrical Si-mirror	2004-03-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 14-ID-B	1.127	APS	14-ID-B

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	1.7	34.3	99.81	0.054	42.3	12.8	103335	98154			26.7

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	1.7	1.76	98.6		0.631	3.4

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1LQ2	1.698	34.3	103322	98154	5168	99.81	0.16104	0.1599	0.15988	0.18301	RANDOM	38.787

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]
-0.39			-0.39		0.79

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.316
r_dihedral_angle_4_deg	16.085
r_dihedral_angle_3_deg	12.712
r_dihedral_angle_1_deg	5.9
r_scangle_it	2.731
r_scbond_it	1.804
r_angle_refined_deg	1.326
r_mcangle_it	0.986
r_mcbond_it	0.638
r_nbtor_refined	0.308
r_symmetry_vdw_refined	0.219
r_symmetry_hbond_refined	0.217
r_nbd_refined	0.2
r_xyhbond_nbd_refined	0.127
r_chiral_restr	0.095
r_bond_refined_d	0.011
r_gen_planes_refined	0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_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	4566
Nucleic Acid Atoms
Solvent Atoms	931
Heterogen Atoms	217

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CCP4	model building
REFMAC	refinement
CCP4	phasing