3D61

Crystal Structure Analysis of 1,5-alpha-arabinanase catalytic mutant (AbnBD147A) complexed to arabinobiose

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3CU9	PDB ENTRY 3CU9

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	Vapor diffusion, Hanging drop, Cocrystaliization	8	295	1.6M lithium sulfate, 0.1M Tris buffer pH 8, 0.5mM arabinobiose, Vapor diffusion, Hanging drop, Cocrystaliization, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.06	40.29

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.087	α = 90
b = 89.732	β = 90
c = 75.985	γ = 90

Symmetry
Space Group	C 2 2 21

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	RIGAKU RAXIS IV		2007-01-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.54

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	1.95	50		0.082	0.067		5.6	21840	21215			14

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3CU9	1.95	28.99	20674	2046	94.8	0.185	0.185	0.222	RANDOM	22.3

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]
-3.4			-4.15		7.55

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	25.4
c_scangle_it	2.94
c_mcangle_it	2.05
c_scbond_it	1.98
c_angle_deg	1.4
c_mcbond_it	1.31
c_improper_angle_d	0.72
c_bond_d	0.006
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2521
Nucleic Acid Atoms
Solvent Atoms	227
Heterogen Atoms	20

Software

Software
Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing