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Παρασκευή 2 Ιουνίου 2017

RNA Binding Protein Vigilin Collaborates with miRNAs To Regulate Gene Expression for Caenorhabditis elegans Larval Development

Extensive studies have suggested that most miRNA functions are executed through complex miRNA-target interaction networks, and such networks function semi-redundantly with other regulatory systems to shape gene expression dynamics for proper physiological functions. We found that knocking down vgln-1, which encodes a conserved RNA-binding protein associated with diverse functions, causes severe larval arrest at the early L1 stage in animals with compromised miRISC functions (an ain-2/GW182 mutant). Through an enhancer screen, we identified five specific miRNAs and miRNA families that act semi-redundantly with VGLN-1 to regulate larval development. By RIP-Seq analysis, we identified mRNAs that are directly bound by VGLN-1 and highly enriched for miRNA binding sites, leading to a hypothesis that VGLN-1 may share common targets with miRNAs to regulate gene expression dynamics for development.



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