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Utilizing a Comprehensive Immunoprecipitation Enrichment System to Identify an Endogenous Post-translational Modification Profile for Target Proteins
08:12

Utilizing a Comprehensive Immunoprecipitation Enrichment System to Identify an Endogenous Post-translational Modification Profile for Target Proteins

Published on: January 8, 2018

Regulation of the mRNA-binding protein HuR by posttranslational modification: spotlight on phosphorylation

Wolfgang Eberhardt1, Anke Doller, Josef Pfeilschifter

  • 1pharmazentrum frankfurt/ ZAFES, Klinikum der Johann Wolfgang Goethe-Universitat, Frankfurt am Main, Germany. w.eberhardt@em.uni-frankfurt.de

Current Protein & Peptide Science
|June 20, 2012
PubMed

Insights

Post-transcriptional regulation by human antigen R (HuR) is modulated by its posttranslational modifications, particularly phosphorylation. These modifications impact HuR

Area of Science:

  • Molecular Biology
  • RNA Biology
  • Cell Signaling

Background:

  • Human antigen R (HuR) and its neuronal homologs regulate mRNAs with AU-rich elements.
  • HuR influences mRNA decay, splicing, polyadenylation, trafficking, translation, and miRNA repression.
  • Posttranslational modifications, especially phosphorylation, are increasingly recognized as key regulators of HuR function.

Purpose of the Study:

  • To review the role of posttranslational modifications, focusing on phosphorylation, in regulating HuR functions.
  • To explore how HuR modifications impact its subcellular localization and mRNA binding.
  • To elucidate the mechanisms by which HuR phosphorylation coordinates diverse regulatory aspects.

Main Methods:

  • Literature review of studies on HuR posttranslational modifications.
  • Analysis of research on HuR phosphorylation by protein kinases.
  • Examination of HuR interactions with ligand proteins, such as 14-3-3 chaperones.

Main Results:

  • Phosphorylation significantly affects HuR's control over mRNA processing and localization.
  • Posttranslational modifications influence HuR's interaction with other proteins, affecting its activity.
  • Specific phosphorylation events coordinate various HuR functions, though mechanisms remain under investigation.

Conclusions:

  • Posttranslational modification, particularly phosphorylation, is critical for HuR-mediated post-transcriptional regulation.
  • Understanding HuR modification mechanisms is essential for deciphering its role in cellular signaling and mRNA dynamics.
  • Further research is needed to fully elucidate how HuR modifications coordinate its diverse functions and interactions.

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