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Abstract The oncoprotein MDM2 is widely recognized as the principal negative regulator of p53, thereby controlling the expression of numerous RNA polymerase II (Pol II)-dependent genes involved in cell cycle arrest and apoptosis. Beyond this canonical role, MDM2 also engages in transcriptional regulation independently of p53, for instance through interactions with polycomb repressor complexes. Here, we identify RNA polymerase III (Pol III) as an additional target of MDM2 function.
Abstract Production of eukaryotic ribosomal subunits is a highly dynamic process; pre-ribosomes undergo numerous structural rearrangements that establish the architecture present in mature complexes and serve as key checkpoints, ensuring the fidelity of ribosome assembly. Using in vivo crosslinking, we here identify the pre-ribosomal binding sites of three RNA helicases.
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