1QHO | pdb_00001qho

FIVE-DOMAIN ALPHA-AMYLASE FROM BACILLUS STEAROTHERMOPHILUS, MALTOSE/ACARBOSE COMPLEX

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6		19 MG ML-1 ENZYME IN 10MM TRIS-HCL BUFFER PH 6.0, 0.2M NACL, 5MM CACL2. THE WELL SOLUTION CONTAINED 0.9M LI2SO4, 2.5% PEH 1450, 50MM TEA BUFFER (PH 6.5) AND 100MM MALTOSE. 20MM ACARBOSE WAS LATER SOAKED INTO CRYSTALS

Crystal Properties
Matthews coefficient	Solvent content
2.87	57.21

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.82	α = 90
b = 89.82	β = 90
c = 185.75	γ = 120

Symmetry
Space Group	P 31 2 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	IMAGE PLATE	MARRESEARCH	LONG FOCUSSING MIRRORS		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	1.7	20	99.1	0.08	19.7	6.7		630805

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)
	1.7	1.73	97.2		0.49	3.1	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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1CDG	1.7	20	95281	1410	99.1	0.151	0.15	0.175	RANDOM

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	27.4
p_staggered_tor	11.4
p_planar_tor	4.3
p_scangle_it	3
p_scbond_it	2.3
p_mcangle_it	1.5
p_mcbond_it	1.2
p_multtor_nbd	0.24
p_singtor_nbd	0.171
p_chiral_restr	0.095
p_planar_d	0.025
p_angle_d	0.022
p_bond_d	0.007
p_plane_restr	0.006
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_xyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5319
Nucleic Acid Atoms
Solvent Atoms	1106
Heterogen Atoms	120

Software

Software
Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling