title: Random coil phosphorus chemical shift of deoxyribonucleic acids.
abstract: Random coil phosphorus chemical shift has been studied using 16 17-nucleotide DNA sequences. Due to the presence of residual base stacking in these sequences, the temperature and sequence effects were investigated at 50 and 55 degrees C. The phosphorus chemical shifts of random coil DNA sequences have been found to be independent of temperature. Sequence effect analysis shows that the phosphorus chemical shift of a nucleotide in a random coil DNA sequence depends on both its 5'- and 3'-nearest neighbors. A trimer model has been used to establish the random coil 31P chemical shift prediction protocol which shows an accuracy of 0.02 ppm.
authors.affiliation: Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong.
authors.forename: Cheuk Nang
authors.initials: CN
authors.lastname: Ho
authors.forename: Sik Lok
authors.initials: SL
authors.lastname: Lam
mesh_terms: D001483:Base Sequence; D004247:DNA / Q000737:chemistry*; D008958:Models, Molecular; D008969:Molecular Sequence Data; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D009690:Nucleic Acid Conformation; D009841:Oligonucleotides / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013269:Stochastic Processes; D013696:Temperature
chemical_list: D009841:Oligonucleotides; D010758:Phosphorus; D004247:DNA