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Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
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Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter

Published on: March 27, 2020

Yaf2 inhibits Myc biological function

Britta Mädge1, Christoph Geisen, Tarik Möröy

  • 1Division of Cytogenetics-H0400, Deutsches Krebsforschungszentrum, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany.

Cancer Letters
|April 23, 2003
PubMed

Insights

The zinc-finger protein Yaf2 interacts with MYC family proteins. Yaf2 enhances MYCN activity but inhibits MYC, revealing a novel regulatory mechanism for these key transcription factors.

Area of Science:

  • Molecular Biology
  • Oncogenes
  • Transcription Factors

Background:

  • The MYC family (MYC, MYCN, MYCL) encodes nuclear transcription factors crucial for cell cycle, differentiation, and apoptosis.
  • The zinc-finger protein Yaf2 was previously shown to enhance MYCN-dependent transcription.

Purpose of the Study:

  • To investigate the interaction between Yaf2 and the MYC protein.
  • To elucidate the functional consequences of Yaf2 binding to MYC and MYCN.

Main Methods:

  • In vivo and in vitro binding assays to confirm Yaf2-Myc interaction.
  • Functional assays to assess the impact of Yaf2 on MYC and MYCN transcriptional activity and transformation potential.

Main Results:

  • Yaf2 binds to the MYC protein both in vivo and in vitro.
  • Unlike its activating effect on MYCN, Yaf2 inhibits MYC-mediated transactivation and transformation.
  • Demonstrates differential regulation of MYC family members by Yaf2.

Conclusions:

  • Yaf2 exhibits distinct regulatory effects on MYC and MYCN.
  • This differential modulation by Yaf2 offers a novel mechanism for controlling MYC transcription factor activity in biological processes.

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