1E40

Tris/maltotriose complex of chimaeric amylase from B. amyloliquefaciens and B. licheniformis at 2.2A

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1E3X

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	291	CRYSTALS WERE GROWN AT 18C USING THE HANGING DROP METHOD WITH 8-13% MONOMETHYL ETHER POLYETHYLENE GLYCOL 2000 OR 5000 AS PRECIPITANT. DROPS WERE BUFFERED WITH 0.1M TRIS/HCL PH 7.5 CONTAINING 5MM CACL2 AND THE PROTEIN CONCENTRATION WAS 30-35MG/ML. CRYSTALS WERE THEN SOAKED IN 10MM MALTOTRIOSE SOLUTION TO OBTAIN THE COMPLEX.

Crystal Properties
Matthews coefficient	Solvent content
2.34	47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 52.72	α = 90
b = 78.27	β = 90
c = 238.86	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	IMAGE PLATE	RAXIS IIC		1994-10-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200

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	2.2	30	94	0.05	33	5.2		23662

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	2.2	2.3	77		0.09	13	4.6

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1E3X	2.2	20	23662	1141	94	0.13	0.21	RANDOM	12.1

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]

RMS Deviations
Key	Refinement Restraint Deviation
p_transverse_tor	28.8
p_staggered_tor	14.8
p_planar_tor	3.4
p_scangle_it	2.732
p_mcangle_it	1.936
p_scbond_it	1.772
p_mcbond_it	1.322
p_multtor_nbd	0.197
p_singtor_nbd	0.173
p_xyhbond_nbd	0.141
p_chiral_restr	0.109
p_planar_d	0.031
p_angle_d	0.03
p_bond_d	0.01
p_plane_restr	0.01
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3900
Nucleic Acid Atoms
Solvent Atoms	539
Heterogen Atoms	47

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
Agrovata	data scaling
ROTAVATA	data scaling
CCP4	phasing