1JDA

MALTOTETRAOSE-FORMING EXO-AMYLASE

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.77	57

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.7	α = 90
b = 171	β = 90
c = 46.8	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		IMAGE PLATE	RIGAKU		1993-12-03	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

Data Collection

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION		2.2	10	2	17893			0.174

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	33.2
p_staggered_tor	20.9
p_planar_tor	3
p_scangle_it	2.582
p_scbond_it	1.725
p_mcangle_it	1.702
p_mcbond_it	1.029
p_multtor_nbd	0.234
p_xyhbond_nbd	0.217
p_chiral_restr	0.204
p_singtor_nbd	0.194
p_planar_d	0.05
p_angle_d	0.04
p_bond_d	0.02
p_plane_restr	0.016
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	3297
Nucleic Acid Atoms
Solvent Atoms	202
Heterogen Atoms	2

Software

Software
Software Name	Purpose
X-PLOR	model building
PROFFT	refinement
X-PLOR	refinement
X-PLOR	phasing