2DXR

Crystal structure of the complex formed between C-terminal half of bovine lactoferrin and sorbitol at 2.85 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	298	0.1M MES, 25% POLYETHYLENE GLYCOL MONOMETHYL ETHER 550, 0.01M ZINC SULPHATE, pH 6.5, VAPOR DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.66	53.74

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.382	α = 90
b = 50.391	β = 107.78
c = 65.856	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	298	IMAGE PLATE	MARRESEARCH	Mirror	2006-08-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.5414

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.85	20	99.4	0.128	6.9		9387	9387			27.342

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.85	2.9	100		0.252	2

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1NKX	2.85	20	9352	8900	451	99.26	0.20122	0.19953	0.19758	0.22695	RANDOM	28.312

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]
1.01		0.19	-0.6		-0.3

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.72
r_dihedral_angle_3_deg	18.602
r_dihedral_angle_4_deg	16.744
r_dihedral_angle_1_deg	5.482
r_scangle_it	4.634
r_scbond_it	2.791
r_mcangle_it	2.084
r_angle_refined_deg	1.585
r_mcbond_it	1.193
r_symmetry_hbond_refined	0.332
r_nbtor_refined	0.328
r_symmetry_vdw_refined	0.323
r_nbd_refined	0.267
r_xyhbond_nbd_refined	0.197
r_metal_ion_refined	0.17
r_chiral_restr	0.106
r_symmetry_metal_ion_refined	0.017
r_bond_refined_d	0.007
r_gen_planes_refined	0.004
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2605
Nucleic Acid Atoms
Solvent Atoms	237
Heterogen Atoms	197

Software

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