3BC9

Alpha-amylase B in complex with acarbose

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	298	0.2M sodium acetate, 0.1M Mes-OH, 20% (w/v) PEG 8000, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.2	61.51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 227.85	α = 90
b = 77.24	β = 98.63
c = 50.38	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	MARMOSAIC 225 mm CCD	toroid mirrors	2007-02-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I911-3	0.9795	MAX II	I911-3

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	1.35	30	99.5	0.076	10.9	4	188142	188142

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)
1	1.35	1.4	98.3		0.795	2.2	3.3	19198

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	FOURIER SYNTHESIS	THROUGHOUT	1.35	30	185716	185716	1877	99.25	0.1514	0.1514	0.15114	0.17814	RANDOM	15.066

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]
0.02		-0.06	1.53		-1.57

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.136
r_dihedral_angle_4_deg	16.36
r_sphericity_free	12.788
r_dihedral_angle_3_deg	12.358
r_dihedral_angle_1_deg	6.121
r_scangle_it	6.046
r_scbond_it	4.379
r_sphericity_bonded	4.169
r_mcangle_it	2.963
r_rigid_bond_restr	2.205
r_mcbond_it	2.051
r_angle_refined_deg	1.941
r_angle_other_deg	1.115
r_mcbond_other	0.874
r_nbd_refined	0.224
r_symmetry_vdw_refined	0.214
r_symmetry_vdw_other	0.209
r_symmetry_hbond_refined	0.205
r_nbd_other	0.203
r_nbtor_refined	0.191
r_xyhbond_nbd_refined	0.169
r_chiral_restr	0.151
r_nbtor_other	0.101
r_metal_ion_refined	0.101
r_symmetry_metal_ion_refined	0.088
r_bond_refined_d	0.022
r_gen_planes_refined	0.011
r_bond_other_d	0.003
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4747
Nucleic Acid Atoms
Solvent Atoms	574
Heterogen Atoms	170

Software

Software
Software Name	Purpose
REFMAC	refinement
ProDC	data collection
XDS	data reduction
XSCALE	data scaling
REFMAC	phasing