[No authors listed]
The p53 tumor suppressor protein is critically involved in cell cycle regulation and programmed cell death. Here we show that expression of the BH3-only protein ITM2Bs is able to induce apoptotic cell death in p53+/+, as well as in p53-/- cell lines. This cell death involves neither subcellular redistribution of p53 nor transcriptional regulation of p53 target genes such as Bax, Ras, Puma or Bcl-2. Together, our data provide evidence for a p53-independent apoptotic role of ITM2Bs.
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