3O97

Crystal Structure of the complex of C-lobe of lactoferrin with indole acetic acid at 2.68 A Resolution

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3IB1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	298	0.01M Znso4, 0.1M MES, 25% PEG, Monomethyl Ether 550, pH 6.5, VAPOR DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.66	53.69

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.234	α = 90
b = 50.396	β = 107.7
c = 65.893	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	300	IMAGE PLATE	MARRESEARCH	MIRROR	2010-07-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.541

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	2.68	63.25	98.2	9.8		11266	10731

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	2.68	2.78	99.8

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	3IB1	2.68	63.24	10309	10309	535	99.59	0.176	0.17456	0.17214	0.22243	RANDOM	39.988

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]
0.91		-1.33	-1.44		-0.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.795
r_dihedral_angle_3_deg	17.971
r_dihedral_angle_4_deg	16.086
r_dihedral_angle_1_deg	6.097
r_scangle_it	3.793
r_scbond_it	2.296
r_angle_refined_deg	2.075
r_mcangle_it	1.715
r_mcbond_it	0.963
r_nbtor_refined	0.308
r_symmetry_hbond_refined	0.307
r_symmetry_vdw_refined	0.285
r_nbd_refined	0.237
r_xyhbond_nbd_refined	0.161
r_metal_ion_refined	0.128
r_chiral_restr	0.092
r_symmetry_metal_ion_refined	0.06
r_bond_refined_d	0.02
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2604
Nucleic Acid Atoms
Solvent Atoms	150
Heterogen Atoms	95

Software

Software
Software Name	Purpose
DENZO	data reduction
MOLREP	phasing
REFMAC	refinement
AUTOMAR	data reduction
SCALEPACK	data scaling