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NMR STRUCTURE OF A CONCATEMER OF THE FIRST AND SECOND LIGAND-BINDING MODULES OF THE HUMAN LDL RECEPTOR
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D-TOCSY 1 mM LB1-2, 15 mM CaCl2, pH 5.5 95% H2O/5% D2O 0.045 5.5 atmospheric atm 310 2 DQF-COSY 1 mM LB1-2, 15 mM CaCl2, pH 5.5 95% H2O/5% D2O 0.045 5.5 atmospheric atm 310 3 2D NOESY 1 mM LB1-2, 15 mM CaCl2, pH 5.5 95% H2O/5% D2O 0.045 5.5 atmospheric atm 310 4 E-COSY 1 mM LB1-2, 15 mM CaCl2, pH 5.5 99% D2O 0.045 5.5 atmospheric atm 310
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker DMX 750
NMR Refinement Method Details Software Torsion angle dynamics (DYANA) followed by simulated annealing and
molecular dynamics (X-PLOR) for calcium coordination NMR inputs: NOE total 889: 286 intra, 273 sequential, 184 medium, 146 long range;
Others: 32 dihedral restraints, 13 h-bonds, 12 calcium coordination XwinNMR
NMR Ensemble Information Conformer Selection Criteria structures with the lowest energy Conformers Calculated Total Number 50 Conformers Submitted Total Number 20 Representative Model 2 (lowest energy)
Additional NMR Experimental Information Details This structure was determined using standard 2D homonuclear techniques
Computation: NMR Software # Classification Version Software Name Author 1 collection XwinNMR 2 BRUKER 2 data analysis XEASY 1.4 ETH-Zurich 3 structure solution DYANA 1.5 Guntert 4 refinement X-PLOR 3.85 Brunger 5 data analysis MOLMOL 2.6 Koradi