3BLK | pdb_00003blk

Role of aromatic residues in starch binding

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9	298	45% MPD, 0.1M Tris.HCl, 10 mM calcium chloride, pH 9.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.37	48.14

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 52.282	α = 90
b = 75.046	β = 90
c = 135.013	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	77	CCD	ADSC QUANTUM 4	mirrors	2007-11-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	CHESS BEAMLINE A1	0.9777	CHESS	A1

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	2	36.16	99.08	0.101	0.101	34.2	5.4	36537	34563	1		40.9

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)
	2	2.03	99.3		0.418	0.418	7.6	5.5	1810

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1SMD	2	36.16	36537	34563	1811	99.08	0.195	0.17763	0.17572	0.1796	0.21475	0.2199	RANDOM	33.573

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]
0.01					-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.662
r_dihedral_angle_4_deg	20.552
r_dihedral_angle_3_deg	15.472
r_dihedral_angle_1_deg	6.504
r_scangle_it	4.227
r_scbond_it	2.884
r_mcangle_it	1.856
r_angle_refined_deg	1.641
r_mcbond_it	1.182
r_nbtor_refined	0.312
r_nbd_refined	0.204
r_symmetry_vdw_refined	0.174
r_symmetry_hbond_refined	0.14
r_xyhbond_nbd_refined	0.125
r_chiral_restr	0.122
r_metal_ion_refined	0.103
r_bond_refined_d	0.02
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3937
Nucleic Acid Atoms
Solvent Atoms	188
Heterogen Atoms	56

Software

Software
Software Name	Purpose
REFMAC	refinement
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
REFMAC	phasing