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PINning down the c-Myc oncoprotein

The proto-oncogenic transcription factor c-Myc is a central regulator of the cell cycle and cell growth. Amino-terminal phosphorylation of c-Myc results in its proteasomal degradation. A new study shows that its dephosphorylation is regulated by the Pin1 prolyl isomerase and PP2A phosphatase, and that stabilized c-Myc can replace SV40 small T antigen in the oncogenic transformation of human cells.

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Figure 1: A finely tuned system to regulate c-Myc protein stability.

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Dominguez-Sola, D., Dalla-Favera, R. PINning down the c-Myc oncoprotein. Nat Cell Biol 6, 288–289 (2004). https://doi.org/10.1038/ncb0404-288

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