Related Experiment Videos
Rice tungro bacilliform virus open reading frames II and III are translated from polycistronic pregenomic RNA by
J Fütterer1, H M Rothnie, T Hohn
1Institute for Plant Sciences, ETH Zentrum, Zürich, Switzerland. johannes.fuetterer@ipw.biol.ethz.ch
Journal of Virology
|October 6, 1997
Summary
Rice tungro bacilliform virus (RTBV) uses leaky scanning for gene expression from a single mRNA. This mechanism relies on specific viral sequences, not a transactivator.
Area of Science:
- Molecular Biology
- Virology
- Plant Pathology
Background:
- Rice tungro bacilliform virus (RTBV) is a significant pathogen affecting rice crops.
- Understanding viral gene expression is crucial for developing effective control strategies.
- Posttranscriptional regulation plays a key role in the life cycle of many viruses.
Purpose of the Study:
- To investigate the posttranscriptional gene expression mechanism of RTBV.
- To elucidate the role of leaky scanning in RTBV translation.
- To identify sequence features supporting this translation mechanism.
Main Methods:
- Transient gene expression assays in protoplasts.
- Analysis of polycistronic mRNA translation.
- Investigation of specific RNA sequence elements.
Main Results:
- RTBV utilizes leaky scanning to translate multiple open reading frames from a single polycistronic mRNA.
- Specific sequence features within the RTBV genome facilitate this leaky scanning mechanism.
- No evidence of a virus-encoded transactivator was found to be necessary for this process.
Conclusions:
- Leaky scanning is a key posttranscriptional mechanism for RTBV gene expression.
- The virus relies on intrinsic sequence elements for efficient translation of its genes.
- This finding simplifies the understanding of RTBV replication and gene regulation.