title: DNA structures from phosphate chemical shifts.
abstract: For B-DNA, the strong linear correlation observed by nuclear magnetic resonance (NMR) between the (31)P chemical shifts (deltaP) and three recurrent internucleotide distances demonstrates the tight coupling between phosphate motions and helicoidal parameters. It allows to translate deltaP into distance restraints directly exploitable in structural refinement. It even provides a new method for refining DNA oligomers with restraints exclusively inferred from deltaP. Combined with molecular dynamics in explicit solvent, these restraints lead to a structural and dynamical view of the DNA as detailed as that obtained with conventional and more extensive restraints. Tests with the Jun-Fos oligomer show that this deltaP-based strategy can provide a simple and straightforward method to capture DNA properties in solution, from routine NMR experiments on unlabeled samples.
authors: INTS, INSERM S-665, Paris 75005, France.
authors: Joséphine
authors: J
authors: Abi-Ghanem
authors: Brahim
authors: B
authors: Heddi
authors: Nicolas
authors: N
authors: Foloppe
authors: Brigitte
authors: B
authors: Hartmann
mesh_terms: D004247:DNA / Q000737:chemistry*; D056004:Molecular Dynamics Simulation; D019906:Nuclear Magnetic Resonance, Biomolecular; D009690:Nucleic Acid Conformation; D010710:Phosphates / Q000737:chemistry*; D016760:Proto-Oncogene Proteins c-fos / Q000737:chemistry; D016755:Proto-Oncogene Proteins c-jun / Q000737:chemistry
chemical_list: D010710:Phosphates; D016760:Proto-Oncogene Proteins c-fos; D016755:Proto-Oncogene Proteins c-jun; D004247:DNA