3L2L

X-ray Crystallographic Analysis of Pig Pancreatic Alpha-Amylase with Limit Dextrin and Oligosaccharide

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	EVAPORATION	6.75	298	0.010 M cacodylate, 0.002 M calcium chloride, pH 6.75, EVAPORATION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
4.34	71.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.59	α = 90
b = 114.82	β = 90
c = 118.78	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	298	AREA DETECTOR	SDMS		1992-09-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

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	2.11	14.01	82.6	0.052	10.93		47149	47147			23.25

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.11	2.22	28.8		3.91		2315

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	MIR	THROUGHOUT	2.11	14.01	47147	47147	4749	84	0.11929	0.11929	0.11502	0.1572	RANDOM	19.7

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]
1.36			-1.27		-0.09

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.877
r_dihedral_angle_4_deg	19.778
r_dihedral_angle_3_deg	14.545
r_dihedral_angle_1_deg	6.044
r_scangle_it	5.443
r_scbond_it	4.199
r_mcangle_it	3.372
r_scangle_other	2.658
r_mcbond_it	2.322
r_mcangle_other	1.889
r_dihedral_angle_other_3_deg	1.678
r_angle_refined_deg	1.487
r_scbond_other	1.481
r_angle_other_deg	0.813
r_mcbond_other	0.595
r_nbd_refined	0.217
r_xyhbond_nbd_refined	0.21
r_nbtor_refined	0.191
r_xyhbond_nbd_other	0.189
r_nbd_other	0.187
r_symmetry_hbond_refined	0.183
r_symmetry_vdw_other	0.176
r_symmetry_hbond_other	0.159
r_symmetry_vdw_refined	0.143
r_chiral_restr	0.112
r_nbtor_other	0.094
r_metal_ion_refined	0.07
r_bond_refined_d	0.013
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3909
Nucleic Acid Atoms
Solvent Atoms	584
Heterogen Atoms	126

Software

Software
Software Name	Purpose
SDMS	data collection
REFMAC	refinement
SDMS	data reduction
SDMS	data scaling