Through-bond correlation of imino and aromatic resonances in 13C-,15N-labeled RNA via heteronuclear TOCSY
- 1 January 1996
- journal article
- research article
- Published by Springer Nature in Journal of Biomolecular NMR
- Vol. 7 (1) , 83-87
- https://doi.org/10.1007/bf00190460
Abstract
Summary Novel HCCNH TOCSY NMR experiments are presented that provide unambiguous assignment of the exchangeable imino proton resonances by intranucleotide through-bond connectivities to the (assigned) nonexchangeable purine H8 and pyrimidine H6 protons in uniformly 15N-, 13C-labeled RNA oligonucleotides. The HCCNH TOCSY experiments can be arranged as a two-dimensional experiment, correlating solely GH8/UH6 and GH1/UH3 proton resonances (HCCNH), of as three-dimensional experiments, in which additional chemical shift labeling either by GN1/UN3 (HCCNH) or by GC8/UC6 (HCCNH) chemical shifts is introduced. The utility of these experiments for the assignment of relatively large RNA oligonucleotides is demonstrated for two different RNA molecules.Keywords
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