Nucleic Acids Research, 1983, Vol. 11, No. 16 5691-5699
© 1983
CHEMISTRY |
A nuclear magnetic resonance study of the ribotrinucleoside dlphophate UpUpC
1Division of Molecular Pharmacology, National Institute for Medical Research Mill Hill, London NW7 1AA, UK
2Max-Planck-Institut f
r Experimentelle Medizin Abteilung Chernie, Hennann-Rein Strasse 3, D-3400 Gottingen, FRG
Received June 23, 1983. Accepted July 28, 1983.
500 MHz 1H, 67.89 MHz 13C and 80.97 MHZ 31P-NMR studies are reported on the ribotrinucleoside diphosphate UpUpC, the triplet codon corresponding to the amino acid phenylalanine. Complete spectral assignments are given and con-formational parameters for the backbone and the furanose rings are determined. All three nucleotide units show a near-balance for the N/S equilibrium with a slight preference for the N-type ribose (
60%) . The backbone conformation around the C3'-03' bonds show a preference for the trans domain, while the orientation aroung the C5'-05' bonds is predominantly trans.