Role of Deltex-1 as a Transcriptional Regulator Downstream of the Notch Receptor

Naoya Yamamoto, Shin Ichi Yamamoto, Fuyuki Inagaki, Masashi Kawaichi, Akiyoshi Fukamizu, Noriyuki Kishi, Kenji Matsuno, Kozo Nakamura, Gerry Weinmaster, Hideyuki Okano, Masato Nakafuku

研究成果: Article

148 引用 (Scopus)

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Intercellular signaling through the cell-surface receptor Notch plays important roles in a variety of developmental processes as well as in pathogenesis of some human cancers and genetic disorders. However, the mechanisms by which Notch signals are transduced into cells still remain elusive. Here we investigated the signaling mechanisms for Notch in the cell fate control of neural progenitor cells. We show that Deltex-1 (DTX1), a mammalian homolog of Drosophila Deltex, mediates a Notch signal to block differentiation of neural progenitor cells. We found that a significant fraction of DTX1 proteins were localized in the nucleus and physically interacted with the transcriptional coactivator p300. Through its binding to p300, DTX1 inhibited transcriptional activation by the neural-specific helix-loop-helix-type transcription factor MASH1, and this mechanism is likely responsible for the differentiation inhibition of neural progenitor cells. Our results further suggest that DTX1 regulates transcription independently of the previously characterized Notch signaling pathway involving RBP-J and HES1/HES5. Thus, DTX1 serves as an important signaling component downstream of Notch that regulates transcription in the nucleus.

元の言語English
ページ(範囲)45031-45040
ページ数10
ジャーナルJournal of Biological Chemistry
276
発行部数48
DOI
出版物ステータスPublished - 2001 11 30

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ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

これを引用

Yamamoto, N., Yamamoto, S. I., Inagaki, F., Kawaichi, M., Fukamizu, A., Kishi, N., Matsuno, K., Nakamura, K., Weinmaster, G., Okano, H., & Nakafuku, M. (2001). Role of Deltex-1 as a Transcriptional Regulator Downstream of the Notch Receptor. Journal of Biological Chemistry, 276(48), 45031-45040. https://doi.org/10.1074/jbc.M105245200