RNA silencing in plants

Article Abstract:

The three natural pathways of RNA silencing in plants that are revealed by genetic and molecular analysis is described and the features that distinguish plant miRNAs from animal miRNAs, and the amplification and mobile signal mechanisms in the siRNA pathways are also discussed. It is concluded that the discovery of RNA silencing has completely changed the view of RNA as regulatory molecule in eukaryotic cells.

Plant genetic engineering

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Control of alternative RNA splicing and gene expression by eukaryotic riboswitches

Article Abstract:

The coenzyme thiamine pyrophosphate (TPP) riboswitches in the filamentous fungus Neurospora crassa are examined and it is found that on activates and two repress gene expression by controlling mRNA splicing. The results have shown that eukaryotic cells use metabolite-binding RNAs to regulate RNA splicing events that are important for the control of key biochemical processes.

Genetic aspects, Gene expression

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Diced defence

Article Abstract:

An enzyme 'Dicer' has been identified in the fruitfly Drosophila melanogaster, which cleaves RNA.

RNA, Drosophila

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