2D3L

Crystal structure of maltohexaose-producing amylase from Bacillus sp.707 complexed with maltopentaose.

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1WP6	Native structure (1WP6)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	293	2,4-dimethylpentanediol, Tris-HCl, Ammonium Phosphate, Calcium chloride, Sodium chloride, Maltopentaose, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.06

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 47.45	α = 90
b = 82.46	β = 90
c = 126.91	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	ADSC QUANTUM 4		2004-12-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-18B	1.15	Photon Factory	BL-18B

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	2.06	20	97.8	0.168		2.3		31896			14.3

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	2.06	2.13	86.7		0.346		3.8	2692

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	Native structure (1WP6)	2.3	6	2	19438	1916	90.6	0.168	0.168	0.213	RANDOM	24.1

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]
8.64			7.21		-15.85

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.3
c_scangle_it	2.23
c_scbond_it	1.7
c_mcangle_it	1.57
c_angle_deg	1.2
c_mcbond_it	1.06
c_improper_angle_d	0.71
c_bond_d	0.006
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3893
Nucleic Acid Atoms
Solvent Atoms	238
Heterogen Atoms	118

Software

Software
Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALEPACK	data scaling
CNS	phasing