2XGB

Crystal structure of Barley Beta-Amylase complexed with 2,3- epoxypropyl-alpha-D-glucopyranoside

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1B1Y	PDB ENTRY 1B1Y

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	291	CRYSTALS WERE GROWN AT 291 K USING THE HANGING DROP VAPOUR DIFFUSION METHOD WITH PROTEIN AT 10 MG PER ML AND A PRECIPITANT COMPRISED OF 14 PERCENT PEG 3350 IN 100 MM BIS-TRIS PROPANE BUFFER AT PH 5.5

Crystal Properties
Matthews coefficient	Solvent content
1.91	35.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.622	α = 90
b = 71.068	β = 90
c = 92.309	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	100	CCD	MARMOSAIC 225 mm CCD		2007-11-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX10.1		SRS	PX10.1

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	1.11	33.69	96.3	0.1	3.56	5.98		135507		-9	10.6

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	1.2	1.26	79.5		0.27	2.76	3.01

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	THROUGHOUT	PDB ENTRY 1B1Y	1.2	33.168	135435	6823	95.922	0.118	0.1167	0.1407	RANDOM	9.8

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]
-0.243			0.288		-0.045

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.736
r_dihedral_angle_4_deg	15.565
r_dihedral_angle_3_deg	12.232
r_sphericity_free	9.67
r_dihedral_angle_1_deg	6.217
r_sphericity_bonded	4.386
r_scangle_it	4.208
r_scbond_it	3.105
r_mcangle_it	2.379
r_angle_refined_deg	1.651
r_mcbond_it	1.619
r_rigid_bond_restr	1.522
r_mcbond_other	0.774
r_symmetry_vdw_other	0.161
r_chiral_restr	0.109
r_bond_refined_d	0.016
r_gen_planes_refined	0.01
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3877
Nucleic Acid Atoms
Solvent Atoms	729
Heterogen Atoms	32

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing