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Increased rates of ribosome biogenesis and biomass accumulation are fundamental properties of rapidly growing and dividing malignant cells. The MYC oncoprotein drives growth predominantly via its ability to upregulate the ribosome biogenesis program, in particular stimulating the activity of the RNA Polymerase I (Pol I) machinery to increase ribosomal RNA (rRNA) transcription. Although MYC function...
S6K1, a critical downstream substrate of mTORC1, has been implicated in regulating protein synthesis and a variety of processes that impinge upon cell growth and proliferation. While the role of the cytoplasmic p70 S6K1 isoform in the regulation of translation has been intensively studied, the targets and function of the nuclear p85 S6K1 isoform remain unclear. Therefore, we carried...
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