Gene silencing by double stranded Ribonucleic acid (RNA)

Hafiz Ghulam Muhu-Din Ahmed, Amna ., Shadab Shaukat, Iqra Kousar, Maria Rafiq, Maria Ilyas, Aziz Ullah, Khuda Buksh


Ribonucleic acid (RNA) silencing, RNA interference (RNAi) or post-transcriptional gene silencing takes place in a variety of eukaryotes and it was discovered firstly in the plants. The RNA silencing process is activated by a trigger from dsRNA predecessor. A very important step in the silencing pathways the conversion of dsRNA into small duplexes of RNA of the representative length and arrangement. Then these small dsRNA monitor RNA silencing by different mechanisms. Post transcriptional gene silencing mechanisms were initially identified as an anti-viral process that give protection to the organisms from the viruses or which inhibit the unsystematic incorporation of transposable components. The basic aim of this review article is to study the mechanism of gene silencing by dsRNA and the roles of certain proteins in cellular post transcriptional RNA silencing machinery and finally we also discuss the RNA silencing as an anti-viral defense mechanism in the plants. 


RNA, gene, silencing, pathway and plant

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