2GVY

Monoclinic crystal form of Aspergillus niger alpha-amylase in complex with maltose at 1.8 A resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	296	30% PEG 6000, 0.1M ammonium sulphate, 0.1M MES, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 296K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.49

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.451	α = 90
b = 101.149	β = 103.89
c = 75.185	γ = 90

Symmetry
Space Group	P 1 21 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	ADSC QUANTUM 210		2005-12-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29	0.97910	ESRF	ID29

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.8	72.987	96.6	0.104	0.104	5.8	7	84823	84823

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.8	1.9	95		0.578	0.578	1.3	6.8	12098

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	MOLECULAR REPLACEMENT	THROUGHOUT	1.8	20	84733	84733	4244	96.46	0.165	0.165	0.162	0.21	RANDOM	26.8

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]
-0.06		-0.32	2.21		-2.3

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.408
r_dihedral_angle_3_deg	14.648
r_dihedral_angle_4_deg	9.206
r_dihedral_angle_1_deg	6.301
r_scangle_it	2.25
r_mcangle_it	1.981
r_angle_refined_deg	1.674
r_scbond_it	1.65
r_mcbond_it	1.387
r_nbtor_refined	0.323

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.408
r_dihedral_angle_3_deg	14.648
r_dihedral_angle_4_deg	9.206
r_dihedral_angle_1_deg	6.301
r_scangle_it	2.25
r_mcangle_it	1.981
r_angle_refined_deg	1.674
r_scbond_it	1.65
r_mcbond_it	1.387
r_nbtor_refined	0.323
r_nbd_refined	0.217
r_symmetry_hbond_refined	0.199
r_symmetry_vdw_refined	0.187
r_xyhbond_nbd_refined	0.184
r_chiral_restr	0.119
r_metal_ion_refined	0.039
r_bond_refined_d	0.018
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7372
Nucleic Acid Atoms
Solvent Atoms	751
Heterogen Atoms	168

Software

Software
Software Name	Purpose
SCALA	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
ProDC	data collection
CCP4	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.