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Sequential resonance assignments in 1H NMR spectra of oligonucleotides by two-dimensional NMR spectroscopy

, : Sequential resonance assignments in 1H NMR spectra of oligonucleotides by two-dimensional NMR spectroscopy. Biochemistry 23(7): 1371-1376

A sequential assignment procedure is outlined, based on two-dimensional NOE ( NOESY ) and two-dimensional J-correlated spectroscopy ( COSY ), for assigning the nonexchangeable proton resonances in NMR spectra of oligonucleotides. As presented here the method is generally applicable to right-handed helical oligonucleotides of intermediate size. We applied it to a lac operator DNA fragment consisting of d( TGAGCGG ) and d( CCGCTCA ) and obtained complete assignments for the adenine H8, guanine H8, cytosine H6 and H5, thymine H6 and 5-methyl, and the deoxyribose H1', H2', H2", H3', and H4' resonances, as well as some H5', H5" (pairwise) assignments. These assignments are required for the analysis of two-dimensional NOE and J-coupling data in terms of the solution structure of oligonucleotides.


PMID: 6722097

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