Abstract
Cellular levels of RNAs containing transposable elements increase in response to various stresses. Polymerase III (Pol III)-dependent transcripts of transposons are different from transposon-containing RNAs generated by read-through Pol II-dependent transcription. Until now, Pol III transcripts were detected by primer extension followed by time-consuming gel electrophoresis. In this paper, we describe a more sensitive PCR-based method for the selective detection of Pol III-transcribed RNAs. The method is based on the difference in sequences at the 5′ ends of the Pol II- and Pol III-dependent transcripts. We employed this method to quantify Pol III transcripts of transposon B1 in rodent cells and revealed that their levels are affected by UV irradiation. We therefore conclude that the abundance of the Pol III-transcribed fraction of cellular RNA may serve as marker of stress response and can be conveniently quantified by the method described.
Abbreviations
- Pol:
-
polymerase
- SINE:
-
short interspersed nuclear element
- UV:
-
ultraviolet
- UTR:
-
untranslated region
- PA:
-
polyacrylamide
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Acknowledgement
The authors thank Dr. Carl Schmid for contributing an idea of adaptor ligation as a means of detection of Pol III transcripts. This work was supported by the grant 050449606 from the Russian Fund for Basic Research (RFBR), the Program MCB RAS and performed in the Institute of Cytology, St. Petersburg, and the Koltsov Institute of Developmental Biology, Moscow, Russia.
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Myakishev, M., Polesskaya, O., Kulichkova, V. et al. PCR-based detection of Pol III-transcribed transposons and its application to the rodent model of ultraviolet response. Cell Stress and Chaperones 13, 111–116 (2008). https://doi.org/10.1007/s12192-008-0010-z
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DOI: https://doi.org/10.1007/s12192-008-0010-z