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RNA accessibility prediction: a theoretical approach is consistent with experimental studies in cell extracts
M Scherr1, J J Rossi, G Sczakiel
1Abteilung für Hämatologie und Onkologie, Medizinische Hochschule Hannover, Carl-Neuberg-Strasse 1, Hannover, Germany.
Abstract:
The use of antisense oligodeoxyribonucleotides (ODN) or ribozymes to specifically suppress gene expression is simple in concept and relies on efficient binding of the antisense strand to the target RNA. Although the identification of target sites accessible to base pairing is gradually being overcome by different techniques, it remains a major problem in the antisense and ribozyme approaches. In this study we have investigated the potential of a recent experimental and theoretical approach to predict the local accessibility of murine DNA-methyltransferase (MTase) mRNA in a comparative way. The accessibility of the native target RNA was probed with antisense ODN in cellular extracts. The results strongly correlated with the theoretically predicted target accessibility. This work suggests an effective two-step procedure for predicting RNA accessibility: first, computer-aided selection of ODN binding sites defined by an accessibility score followed by a more detailed experimental procedure to derive information about target accessibility at the single nucleotide level.
Insights
Predicting RNA accessibility for gene silencing is crucial. This study shows a two-step method combining computational and experimental approaches to accurately identify effective antisense oligodeoxyribonucleotide binding sites on target mRNA.
Area of Science:
- Molecular Biology
- Gene Regulation
- Bioinformatics
Background:
- Antisense oligodeoxyribonucleotides (ODN) and ribozymes offer targeted gene expression suppression.
- A key challenge is identifying accessible target RNA sites for effective ODN binding.
- Accurate prediction of RNA accessibility is vital for antisense and ribozyme strategies.
Purpose of the Study:
- To evaluate a combined experimental and theoretical approach for predicting local RNA accessibility.
- To assess the accessibility of murine DNA-methyltransferase (MTase) mRNA for antisense ODN binding.
- To establish a reliable two-step procedure for optimizing antisense-based gene silencing.
Main Methods:
- Utilized a recent experimental and theoretical framework to predict RNA accessibility.
- Probed the accessibility of native murine MTase mRNA using antisense ODN in cellular extracts.
- Correlated experimental accessibility data with theoretically predicted target site accessibility.
Main Results:
- Experimental results for antisense ODN binding strongly correlated with theoretical accessibility predictions.
- Demonstrated the feasibility of predicting RNA target site accessibility computationally.
- Validated the effectiveness of the chosen approach for identifying accessible binding sites.
Conclusions:
- A two-step strategy combining computational prediction and experimental validation is effective for predicting RNA accessibility.
- This approach facilitates the selection of optimal ODN binding sites for gene silencing applications.
- The findings enhance the development of antisense and ribozyme-based therapeutic strategies.