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Direct Observation of Hydrogen Bonds in Nucleic Acid Base Pairs by Internucleotide 2JNN Couplings

Dingley, Andrew J., Grzesiek, Stephan·1998·Journal of the American Chemical Society

Abstract

Hydrogen bonds play a key role in the stabilization of protein and nucleic acid secondary structure. Currently, most of the experimental evidence for the interaction of hydrogen bond donor and acceptor atoms is indirect. Here we show that scalar couplings across the hydrogen bond are observable for Watson−Crick base pairs in 15 N-labeled RNA. These scalar couplings correlate the imino donor 15 N nucleus and the corresponding acceptor 15 N nucleus on the complementary base. The two-bond J NN couplings between the N3 of uridine and the N1 of adenosine, and between the N1 of guanosine and the N3 of cytidine, have values of approximately 7 Hz as determined by a novel quantitative J -correlation experiment for the 69-nucleotide T1 domain of the potato spindle tuber viroid. In contrast, for non-Watson−Crick base pairs the hydrogen bond acceptor is usually not a nitrogen, but an oxygen atom, and thus, the two-bond J NN couplings are not observed.

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Metadata

Authors
Dingley, A. J., & Grzesiek, S.
Venue
Journal of the American Chemical Society
Published
1998-08-01
Volume
120
Issue
33
Pages
8293-8297
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2094342137
Cited by
626
References
0
FWCI
29.32
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Direct Observation of Hydrogen Bonds in Nucleic Acid Base Pairs by Internucleotide 2JNN Couplings. https://app.cochat.ai/papers/10.1021/ja981513x
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Dingley, A. J., & Grzesiek, S. (1998). Direct Observation of Hydrogen Bonds in Nucleic Acid Base Pairs by Internucleotide 2JNN Couplings. Journal of the American Chemical Society. https://doi.org/10.1021/ja981513x

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