2ALU

Detection of new binding site in the C-terminal lobe of lactoferrin:Crystal structure of the complex formed between bovine lactoferrin and a tetrasaccharide at 2.1A resolution

X-RAY DIFFRACTION

Crystallization

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

Crystal Properties
Matthews coefficient	Solvent content
2.5	51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.508	α = 90
b = 50.518	β = 107.76
c = 66.114	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	283	IMAGE PLATE	MARRESEARCH	mirror	2005-07-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.5418

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	2.09	63.25	91.45			21395	21395

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	2.09	2.15	95.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	2.09	63.25	21395	21395	456	91.45	0.2113	0.19789	0.19755	0.2124	RANDOM	33.291

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]
-0.03		-1.87	-0.11		-1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	17.262
r_scangle_it	4.532
r_dihedral_angle_1_deg	3.747
r_scbond_it	2.731
r_mcangle_it	1.972
r_angle_refined_deg	1.813
r_mcbond_it	1.063
r_symmetry_vdw_refined	0.284
r_nbd_refined	0.275
r_xyhbond_nbd_refined	0.174

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	17.262
r_scangle_it	4.532
r_dihedral_angle_1_deg	3.747
r_scbond_it	2.731
r_mcangle_it	1.972
r_angle_refined_deg	1.813
r_mcbond_it	1.063
r_symmetry_vdw_refined	0.284
r_nbd_refined	0.275
r_xyhbond_nbd_refined	0.174
r_symmetry_hbond_refined	0.155
r_metal_ion_refined	0.145
r_chiral_restr	0.113
r_bond_refined_d	0.015
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2593
Nucleic Acid Atoms
Solvent Atoms	281
Heterogen Atoms	193

Software

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.