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Journal/Book: J Am Chem Soc
Published: 2009
Pages: 15761–15768
Volume: 131
Accession no.: 178

Evaluation of parameters critical for observing nucleic acids inside living Xenopus laevis oocytes by in-cell NMR spectroscopy.

Robert Hänsel, Silvie Foldynová-Trantírková, Frank Löhr, Janina Buck, Eva Bongartz, Ernst Bamberg, Harald Schwalbe, Volker Dötsch, Lukás Trantírek
In-cell NMR spectroscopy of proteins in different cellular environments is a well-established technique that, however, has not been applied to nucleic acids so far. Here, we show that isotopically labeled DNA and RNA can be observed inside the eukaryotic environment of Xenopus laevis oocytes by in-cell NMR spectroscopy. One limiting factor for the observation of nucleic acids in Xenopus oocytes is their reduced stability. We demonstrate that chemical modification of DNA and RNA can protect them from degradation and can significantly enhance their lifetime. Finally, we show that the imino region of the NMR spectrum is devoid of any oocyte background signals enabling the detection even of isotopically nonlabeled molecules.
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Prof. Dr. Harald Schwalbe
Institut für Organische Chemie und Chemische Biologie
Johann Wolfgang Goethe Universität
Max-von-Laue-Str. 7
D-60438 Frankfurt am Main
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