RNA-induced silencing complex (RISC) Proteins PACT, TRBP, and Dicer are SRA binding nuclear receptor coregulators
Copyright policy )RNA-induced silencing complex (RISC) Proteins PACT, TRBP, and Dicer are SRA binding nuclear receptor coregulators
The cytoplasmic RNA-induced silencing complex (RISC) contains dsRNA binding proteins, including protein kinase RNA activator (PACT), transactivation response RNA binding protein (TRBP), and Dicer, that process pre-microRNAs into mature microRNAs (miRNAs) that target specific mRNA species for regulation. There is increasing evidence for important functional interactions between the miRNA and nuclear receptor (NR) signaling networks, with recent data showing that estrogen, acting through the estrogen receptor, can modulate initial aspects of nuclear miRNA processing. Here, we show that the cytoplasmic RISC proteins PACT, TRBP, and Dicer are steroid receptor RNA activator (SRA) binding NR coregulators that target steroid-responsive promoters and regulate NR activity and downstream gene expression. Furthermore, each of the RISC proteins, together with Argonaute 2, associates with SRA and specific pre-microRNAs in both the nucleus and cytoplasm, providing evidence for links between NR-mediated transcription and some of the factors involved in miRNA processing.
- Baylor College of Medicine United States
- McGill University Canada
- Royal Perth Hospital Australia
- University of Western Australia Australia
- Harry Perkins Institute of Medical Research Australia
Ribonuclease III, Chromatin Immunoprecipitation, Reverse Transcriptase Polymerase Chain Reaction, Blotting, Western, RNA-Binding Proteins, Cell Fractionation, Transfection, DEAD-box RNA Helicases, MicroRNAs, HEK293 Cells, Gene Expression Regulation, MCF-7 Cells, Humans, RNA-Induced Silencing Complex, RNA Interference, Cloning, Molecular, Carrier Proteins, Luciferases, HeLa Cells, Plasmids
Ribonuclease III, Chromatin Immunoprecipitation, Reverse Transcriptase Polymerase Chain Reaction, Blotting, Western, RNA-Binding Proteins, Cell Fractionation, Transfection, DEAD-box RNA Helicases, MicroRNAs, HEK293 Cells, Gene Expression Regulation, MCF-7 Cells, Humans, RNA-Induced Silencing Complex, RNA Interference, Cloning, Molecular, Carrier Proteins, Luciferases, HeLa Cells, Plasmids
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