A Gene-Expression Inhibitor that Targets an -Helix-Mediated Protein Interaction
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- 作者：Shinichi Asada ; Yongmun Choi ; and Motonari Uesugi
- 刊名：Journal of the American Chemical Society
- 出版年：2003
- 出版时间：April 30, 2003
- 年：2003
- 卷：125
- 期：17
- 页码：4992 - 4993
- 全文大小：88K
- 年卷期：v.125,no.17(April 30, 2003)
- ISSN：1520-5126
文摘
Protein-protein interactions are harder to target by small organic molecules than by enzymes or nuclear hormone receptors. Here we report the discovery of an organic compound that inhibits the expression of the Her2 oncogene by disrupting an 
-helix-mediated protein interaction. The druglike molecule we named adamanolol competitively inhibited the interaction between the two cancer-linked nuclear proteins, ESX (an epithelial-specific transcription factor) and Sur-2/DRIP130 (a Ras-linked subunit of the human mediator complex), which is important for the overexpression of Her2 gene in malignant breast cancer cells. Adamanolol impaired Her2 expression and caused cell death selectively in Her2-positive breast cancer cells. NMR signals of adamanolol suggest that its rigid conformation plays a role in forming a helixlike surface for the interaction.
-helix-mediated protein interaction. The druglike molecule we named adamanolol competitively inhibited the interaction between the two cancer-linked nuclear proteins, ESX (an epithelial-specific transcription factor) and Sur-2/DRIP130 (a Ras-linked subunit of the human mediator complex), which is important for the overexpression of Her2 gene in malignant breast cancer cells. Adamanolol impaired Her2 expression and caused cell death selectively in Her2-positive breast cancer cells. NMR signals of adamanolol suggest that its rigid conformation plays a role in forming a helixlike surface for the interaction.