3BX7

Engineered Human Lipocalin 2 (LCN2) in Complex with the Extracellular Domain of Human CTLA-4


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1I85PDB ENTRY 1I85 chain C, PDB ENTRY 1DFV chain B
experimental modelPDB 1DFVPDB ENTRY 1I85 chain C, PDB ENTRY 1DFV chain B

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP8.4293.151.4 M Na-malonate, pH 8.4, VAPOR DIFFUSION, SITTING DROP, temperature 293.15K

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 120.706α = 90
b = 120.706β = 90
c = 82.957γ = 120
Symmetry
Space GroupP 32 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDMARMOSAIC 225 mm CCDmirror2006-10-31MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONBESSY BEAMLINE 14.10.95373BESSY14.1

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Sym I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.12598.94.9308.640987
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
2.12.1896.841.93.38.1

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1I85 chain C, PDB ENTRY 1DFV chain B2.12040457203698.80.2090.22639.06
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]
5.0480.475.048-10.097
RMS Deviations
KeyRefinement Restraint Deviation
c_scangle_it3.144
c_mcangle_it2.251
c_scbond_it2.098
c_mcbond_it1.399
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms2287
Nucleic Acid Atoms
Solvent Atoms186
Heterogen Atoms

Software

Software
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing