3BCD

Alpha-amylase B in complex with maltotetraose and alpha-cyclodextrin

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
3.26	62.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 228.7	α = 90
b = 78.05	β = 98.9
c = 50.64	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	MAR CCD 165 mm	mirrors	2007-02-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I911-2	1.0412	MAX II	I911-2

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	2.15	30	97.9	0.057	18	3.8	47080	47080

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	2.15	2.2	96		0.463	3.6	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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	PDB ENTRY 3BC9	2.2	30	43089	43089	898	98.15	0.19685	0.19595	0.24008	RANDOM	9.137

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]
0.19		0.38	1.16		-1.23

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.667
r_dihedral_angle_4_deg	17.689
r_dihedral_angle_3_deg	16.556
r_dihedral_angle_1_deg	6.77
r_scangle_it	3.526
r_scbond_it	2.352
r_angle_refined_deg	1.939
r_angle_other_deg	1.597
r_mcangle_it	1.493
r_mcbond_it	1.013
r_metal_ion_refined	0.299
r_mcbond_other	0.228
r_nbd_refined	0.218
r_nbd_other	0.207
r_nbtor_refined	0.195
r_xyhbond_nbd_refined	0.182
r_symmetry_vdw_other	0.171
r_symmetry_hbond_refined	0.135
r_symmetry_vdw_refined	0.128
r_chiral_restr	0.115
r_nbtor_other	0.095
r_xyhbond_nbd_other	0.044
r_bond_refined_d	0.022
r_gen_planes_refined	0.008
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4747
Nucleic Acid Atoms
Solvent Atoms	259
Heterogen Atoms	164

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345	data collection
XDS	data reduction
XSCALE	data scaling
REFMAC	phasing