Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 129, Issue 48, Pages 14911-14921Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja073825i
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Funding
- NCI NIH HHS [F32 CA80349] Funding Source: Medline
- NIGMS NIH HHS [GM-66669, GM-53757] Funding Source: Medline
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Enzymatic synthesis methods for the fluorinated 5'-triphosphqte analogues 5F-UTP and 5F-CTP have been developed to facilitate F-19-labeling of RNAs for biophysical studies. HIV-2 TAR RNAs were synthesized using these analogues by in vitro transcription reactions using T7 RNA polymerase. The uniform incorporation of 5F-U or 5F-C analogues into HIV-2 TAR RNA transcripts does not significantly alter the RNA structure or thermodynamic stability. Fluorine observed homonuclear F-19-F-19 and heteronuclear F-19-H-1 NOE experiments providing selective distance information are presented and discussed. The availability of efficient synthesis of 5F-UTP, and for the first time, 5F-CTP, will facilitate the use of 5F-labeled RNAs in structural, ligand binding, and dynamic studies of RNAs using the advantages of F-19-labeling.
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