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Cellular functions of TIP60.

Vasileia Sapountzi1, Ian R Logan, Craig N Robson

  • 1Northern Institute for Cancer Research, Paul O'Gorman Building, Medical School, Framlington Place, University of Newcastle Upon Tyne, Newcastle Upon Tyne NE2 4HH, United Kingdom.

The International Journal of Biochemistry & Cell Biology
|May 16, 2006
PubMed
Summary
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The TIP60 protein, initially known for its role in transcription, is now recognized as a multifunctional enzyme. It participates in diverse cellular processes including DNA repair, cell signaling, and apoptosis.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • The protein TIP60 (Tat-interactive protein 60) was first identified through its interaction with HIV-1 Tat.
  • Its function in transcriptional regulation has been extensively studied.
  • Emerging evidence indicates broader roles for TIP60 beyond transcription.

Purpose of the Study:

  • To explore the diverse functions of TIP60.
  • To highlight TIP60's involvement in various cellular processes.
  • To underscore TIP60's role as a multifunctional nuclear enzyme.

Main Methods:

  • Literature review of recent findings on TIP60.
  • Analysis of TIP60's interactions with transcription factors.
  • Investigation of TIP60's role in DNA damage response pathways.

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Main Results:

  • TIP60 is implicated in cellular signaling, DNA damage repair, cell cycle control, and apoptosis.
  • It acts as a transcriptional coregulator for factors like androgen receptor, Myc, STAT3, NF-kappaB, E2F1, and p53.
  • TIP60 is recruited to DNA double-strand breaks, participating in both early and late repair stages.

Conclusions:

  • TIP60 is a versatile enzyme with critical roles in multiple nuclear transactions.
  • Its acetyltransferase activity is recruited to chromatin for transcriptional regulation.
  • TIP60 is essential for maintaining genomic stability through its involvement in DNA repair.