SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents1-2mM qCRP2(LIM2) U-15N,13C; 20 mM potassium phosphate, 50mM KCl, 0.5mM dithiothreitol, 90% H2O, 10% D2O
Solvent90% H2O, 10% D2O
Ionic Strength20mM potassium phosphate; 50mM KCl
pH7.2
Pressureambient
Temperature (K)299
Experiment(s):15N-HSQC, 3D_HNCA, 3D_HNCACB, 3D_HNCO, 3D_CBCA(CO)NH, 3D_HCCH-TOCSY, 3D_CCH-TOCSY-NNH, 3D_13C-NOESY-HSQC_(CA-centered), 3D_13C-NOESY-HSQC_(methyl-centered)
Sample Contents1-2mM qCRP2(LIM2) U-15N; 20 mM potassium phosphate, 50mM KCl, 0.5mM dithiothreitol, 90% H2O, 10% D2O
Solvent90% H2O, 10% D2O
Ionic Strength20mM potassium phosphate; 50mM KCl
pH7.2
Pressureambient
Temperature (K)299
Experiment(s):3D_15N-NOESY-HSQC
Spectrometer Information
Manufacturer Model Field Strength
VARIAN UNITYPLUS 500 500.0
NMR Refinement
Method simulated annealing
Details This entry represents the C-terminal LIM domain of the quail cysteine rich protein CRP2(LIM2) consisting of 15 minimized final structures. Residues MET 82 - ALA 117 and ASN 175 - GLN 194 were not observed and there is no information regarding the conformation that these residues may adopt in solution. The only stretch of residues for which there is structural information is GLU 118 - LYS 174 so the simulations were restricted to the central part ALA 117 - ASN 175, containing the two zinc knuckles. In an initial stage zinc was covalently attached to a linearized template structure, then tetrahedral coordination was enforced by distance constraints. Finally the zinc ions were covalently attached to the coordinating residues using standard force field parameters. 653 inter- and intra-residue NOE restraints were defined as strong, medium, weak and very weak and applied during the final refinement as well as 28 torsion angle restraints and 15 hydrogen bond restraints. Omega dihedral angles were restrained to trans (E). Average rmsd from exp. distance restraints(angstroms) 0.01, average rmsd from idealized covalent geometry: bonds(angstroms): 0.01; angles(deg) 1.98;
NMR Ensemble Information
Conformer Selection Criteria structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number 100
Conformers Submitted Total Number 15
Representative Model Choice Rationale
1 lowest energy
Additional NMR Experimental Information
1 Projection data related to the backbone dihedrals phi, psi from CaHa(i)-DD/C'(i)-CSA and CAHA(i)-DD/C'(i-1)-CSA relaxation and 15N(i)-1HN(i)-DD/13CO(i)-CSA and 1H(i)-15N(i)-13C'(i) DD-CSA cross correlation experiments. Side-chain dihedral angles chi1 from 2D quantitative J-spectroscopy experiments giving access to 3J(CO,Cgamma) and 3J(N,Cgamma). Differential relaxation of multiple-quantum coherences Gamma(i,j)=R(DQ)-R(ZQ), i,j denote 15N,1HN or 13C',15N, respectively.
Computation: NMR Software
# Classification Software Name Author
1 refinement X-PLOR 3.851 Brunger, A.
2 structure solution CNS 1.0 Brunger, A.
3 data analysis ANSIG v3.3 Kraulis, P.
4 processing NMRPipe v1.8 Rev 2001.030.21.27 Delaglio, F.
5 collection VNMR v6.1 Rev.B Varian Associates, Inc.