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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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A novel mechanism of action for v-ErbA: abrogation of the inactivation of transcription factor AP-1 by retinoic acid and thyroid hormone receptors.

Ligand-activated retinoic acid receptor alpha (RAR alpha) and c-ErbA alpha repress the AP-1-mediated transcriptional activation of the interstitial collagenase gene promoter by specifically decreasing the activity of the AP-1 transcription factor. On the other hand, the v-ErbA oncoprotein fails to repress the AP-1 activity and acts as a dominant negative oncoprotein by overcoming the repression of the AP-1 activity induced by RAR alpha and c-ErbA alpha. This maintenance by v-ErbA of a fully active AP-1 complex is correlated with the abrogation by this same oncogene product of the growth-inhibitory response of chicken embryo fibroblasts to retinoic acid treatment. This new mechanism of action of v-ErbA together with its previously discovered dominant repressor effect on transcription of thyroid hormone-activated target genes may explain the contribution of the v-erbA oncogene to sarcomatogenic and leukemogenic transformation.[1]

References

  1. A novel mechanism of action for v-ErbA: abrogation of the inactivation of transcription factor AP-1 by retinoic acid and thyroid hormone receptors. Desbois, C., Aubert, D., Legrand, C., Pain, B., Samarut, J. Cell (1991) [Pubmed]
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