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Does isoform diversity explain functional differences in the 14-3-3 protein family?

E Kjarland1, T J Keen, R Kleppe

  • 1Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009 Bergen, Norway. endre.kjarland@biomed.uib.no

Current Pharmaceutical Biotechnology
|June 23, 2006
PubMed

Insights

The 14-3-3 proteins, crucial for cell biology, bind over 300 phosphoproteins, regulating diverse cellular processes. Their distinct isoforms and phosphorylation regulation are key areas of ongoing research and potential drug targeting.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • The 14-3-3 protein family, first identified in 1967, plays a ubiquitous role in cell biology.
  • These proteins were the first recognized to bind specific phosphoserine/threonine-binding motifs.
  • In mammals, the family consists of seven homologous isoforms expressed across all eukaryotes.

Purpose of the Study:

  • To review recent findings on 14-3-3 protein regulation by phosphorylation.
  • To discuss the functional significance of distinct 14-3-3 isoforms using proteomics data.
  • To explore 14-3-3 protein interactions as a potential drug target.

Main Methods:

  • Literature review of recent reports on 14-3-3 protein regulation.
  • Analysis of proteomics studies to understand isoform significance.
  • Discussion of 14-3-3 protein interaction mechanisms.

Main Results:

  • 14-3-3 proteins bind over 300 partners, primarily phosphoproteins.
  • They are involved in regulating numerous cellular processes, including metabolism, transcription, and cell cycle.
  • Phosphorylation is a key regulatory mechanism for 14-3-3 proteins.

Conclusions:

  • 14-3-3 proteins are central regulators of diverse cellular functions due to their protein-binding capabilities.
  • Distinct isoforms likely possess specialized roles, as suggested by proteomics data.
  • Targeting 14-3-3 interactions presents a promising avenue for therapeutic development.

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