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Role of Id family proteins in growth control

Yoshifumi Yokota1, Seiichi Mori

  • 1Department of Biochemistry, Fukui Medical University, 23-3 Shimoaizuki, Matsuoka, Fukui 910-1193, Japan. yyokota@fmsrsa.fukui-med.ac.jp

Journal of Cellular Physiology
|January 25, 2002
PubMed

Insights

Id proteins, inhibitors of DNA binding/differentiation, regulate cell growth by maintaining precursor cell immaturity and influencing cell cycle progression. Their complex roles in apoptosis and survival impact tumor development.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Developmental Biology

Background:

  • Id proteins are negative regulators of basic helix-loop-helix (bHLH) transcription factors.
  • They classically inhibit cell differentiation but also stimulate cell cycle progression.
  • Id proteins are implicated in maintaining precursor cell immaturity and population expansion.

Purpose of the Study:

  • To summarize and discuss the multifaceted biological activities of Id proteins.
  • To explore their role in cell growth control.
  • To examine their context-dependent functions in apoptosis and cell survival.

Main Methods:

  • Review of in vitro and in vivo analyses.
  • Discussion of Id protein expression in human tumors.
  • Synthesis of current research on Id protein functions.

Main Results:

  • Id proteins exhibit complex activities, including induction of apoptosis or promotion of cell survival based on cellular context.
  • Dysregulated Id protein expression is linked to the malignant characteristics of several human tumors.
  • Id proteins play a significant role in controlling cell growth and differentiation.

Conclusions:

  • Id proteins are critical regulators of cell growth control with diverse functions.
  • Their dysregulation is associated with tumorigenesis.
  • Further research into Id protein activities is essential for understanding development and disease.

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