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The Role of Long Non-coding RNA in Transcriptional Gene Silencing

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Specialty Biology
Date 2012 Sep 11
PMID 22960034
Citations 80
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Abstract

Transcriptional gene silencing controls the activity of transposable elements and expression of protein-coding genes. It requires non-coding transcription, which in plants is performed by RNA Polymerases IV and V (Pol IV and Pol V). Pol IV produces precursors for siRNA biogenesis while Pol V produces scaffold transcripts required for siRNAs and associated proteins to recognize their target loci. In this review I discuss the mechanisms used by Pol IV and Pol V to mediate repressive chromatin modifications. I further discuss the mechanisms controlling non-coding transcription and their role in regulation of genome activity.

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