Abstract
DDX6 (Rck/p54), a member of the DEAD-box family of helicases, is highly conserved from unicellular eukaryotes to vertebrates. Functions of DDX6 and its orthologs in dynamic ribonucleoproteins contribute to global and transcript-specific messenger RNA (mRNA) storage, translational repression, and decay during development and differentiation in the germline and somatic cells. Its role in pathways that promote mRNA-specific alternative translation initiation has been shown to be linked to cellular homeostasis, deregulated tissue development, and the control of gene expression in RNA viruses. Recently, DDX6 was found to participate in mRNA regulation mediated by miRNA-mediated silencing. DDX6 and its orthologs have versatile functions in mRNA metabolism, which characterize them as important post-transcriptional regulators of gene expression.
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