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Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome
07:23

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STRA13 interacts with STAT3 and modulates transcription of STAT3-dependent targets

A V Ivanova1, S V Ivanov, X Zhang

  • 1Basic Research Program, SAIC-Frederick Inc., National Cancer Institute at Frederick, National Institutes of HEalth, Frederick, MD 21702, USA. ivanova@mail.ncifcrf.gov

Journal of Molecular Biology
|June 30, 2004
PubMed

Insights

STRA13, a transcription factor, interacts with STAT3, influencing apoptosis regulation. This study reveals STRA13

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Immunology

Background:

  • STRA13 is a pVHL-dependent transcription factor involved in immune regulation.
  • STAT3 is a key signaling molecule in cellular processes.

Purpose of the Study:

  • To identify STRA13-interacting proteins with oncogenic potential.
  • To elucidate the role of STRA13 in STAT3-mediated gene regulation and apoptosis.

Main Methods:

  • Yeast two-hybrid screening to identify protein interactions.
  • Western blotting and reporter assays to study protein binding and transcriptional activity.
  • Over-expression studies in cancer cell lines.

Main Results:

  • STRA13 was identified as a binding partner of STAT3 beta.
  • STRA13 binds to phosphorylated STAT3 isoforms and activates STAT-dependent transcription.
  • STRA13 over-expression induces apoptosis via the Fas gene, but this effect is alleviated by STAT3 beta co-expression.

Conclusions:

  • STRA13 interacts with STAT3, modulating its transcriptional activity.
  • STRA13 plays a role in apoptosis regulation through the STAT pathway.
  • This interaction offers new insights into cancer and immune regulation.

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