6GE7

Thermodynamic, Crystallographic and Computational Studies of Non Mammalian Fatty Acid Binding to Bovine b-Lactoglobulin

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293.2	protein 20 mg/mL, ligand 10mM, 20mM Tris buffer, pH 8, which were mixed with 4 microliter of well solution. Drops were equilibrated against 1 mL of well solution containing 1.43 M sodium citrate and 0.1M Hepes, pH 7.5

Crystal Properties
Matthews coefficient	Solvent content
2.57	52.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.999	α = 90
b = 53.999	β = 90
c = 111.929	γ = 120

Symmetry
Space Group	P 32 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	CCD	MAR CCD 165 mm		2000-07-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX9.5	1.2	SRS	PX9.5

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.3	25	98.9	18.3	9.4		8916

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	2.3	2.34

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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		THROUGHOUT	2.3	24.33	8317	418	98.36	0.19456	0.19191	0.24778	RANDOM	47.083

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]
-0.27	-0.14		-0.27		0.88

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.752
r_dihedral_angle_3_deg	16.499
r_dihedral_angle_4_deg	14.511
r_dihedral_angle_1_deg	8.078
r_long_range_B_refined	6.23
r_long_range_B_other	6.114
r_mcangle_it	3.527
r_mcangle_other	3.525
r_scangle_other	3.46
r_mcbond_it	2.082
r_mcbond_other	2.08
r_scbond_it	2.06
r_scbond_other	2.059
r_angle_refined_deg	1.534
r_angle_other_deg	0.499
r_chiral_restr	0.065
r_bond_refined_d	0.011
r_gen_planes_refined	0.009
r_bond_other_d	0.003
r_gen_planes_other	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1280
Nucleic Acid Atoms
Solvent Atoms	77
Heterogen Atoms	21

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SORTRF	data scaling
MOLREP	phasing