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A Photodeactivatable Antagonist for Controlling CREB-Dependent Gene Expression

Takuma Imoto1, Masafumi Minoshima1, Tatsushi Yokoyama2

  • 1Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.

ACS Central Science
|November 4, 2020
PubMed

Insights

Researchers developed a new light-activated gene control method. This strategy uses light to control the cAMP response element binding protein (CREB) for temporal gene expression regulation.

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Photochemistry

Background:

  • Controlling gene expression is crucial for biological research and therapeutic applications.
  • Existing methods for gene control often lack temporal precision.
  • The cAMP response element binding protein (CREB) pathway is a key regulator of gene transcription.

Purpose of the Study:

  • To develop a novel photodeactivation strategy for precise temporal control of gene expression.
  • To investigate the light-induced activation of CREB for gene regulation.
  • To enable light-triggered recovery of CREB-dependent transcriptional activity.

Main Methods:

  • Development of a photoresponsive protecting group for a CREB antagonist.
  • Light-induced cleavage of the protecting group to release the antagonist.
  • Photodissociation enabling protein-protein interactions between CREB and CBP.
  • Irradiation of antagonist-treated HEK293T cells to induce gene expression.

Main Results:

  • Successful light-induced cleavage of the photoresponsive protecting group.
  • Photocleaved products exhibited weak binding affinity for CBP.
  • Restoration of protein-protein interactions between CREB and CBP.
  • Temporal recovery of CREB-dependent transcriptional activity and endogenous gene expression was achieved.

Conclusions:

  • A novel photodeactivation strategy for controlling gene expression has been established.
  • Light can be used to temporally regulate CREB-dependent gene transcription.
  • This method offers precise photolytic control over endogenous gene expression.

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