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O-GlcNAc: A Sweetheart of the Cell Cycle and DNA Damage Response

Caifei Liu1, Jing Li1

  • 1Beijing Key Laboratory of DNA Damage Response and College of Life Sciences, Capital Normal University, Beijing, China.

Frontiers in Endocrinology
|August 15, 2018
PubMed

Insights

O-linked N-acetylglucosamine (O-GlcNAc) is a key protein modification regulating the cell cycle and DNA damage response. This study explores its multifaceted roles in maintaining genome integrity and cell division.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • O-linked N-acetylglucosamine (O-GlcNAc) is a dynamic post-translational modification occurring on Ser/Thr residues.
  • Unlike phosphorylation, O-GlcNAc modification is catalyzed by a single enzyme, O-GlcNAc transferase (OGT), and reversed by O-GlcNAcase (OGA).
  • Advancements in technology facilitate the identification and functional analysis of O-GlcNAcylated proteins.

Purpose of the Study:

  • To summarize the current understanding of O-GlcNAc's role in cell cycle progression.
  • To elucidate the involvement of O-GlcNAc in the DNA damage response.
  • To highlight the significance of O-GlcNAc in maintaining genome integrity.

Main Methods:

  • Review of existing literature on O-GlcNAc modification.
  • Analysis of proteomic data identifying O-GlcNAcylated proteins.
  • Functional studies investigating the impact of O-GlcNAc on cell cycle and DNA repair pathways.

Main Results:

  • O-GlcNAc is crucial for normal cell cycle progression, including DNA replication, mitosis, and cytokinesis.
  • O-GlcNAc modification of histones, kinases, and scaffold proteins contributes to genome protection under DNA damage stress.
  • The O-GlcNAc modification system plays a vital role in cellular responses to genotoxic insults.

Conclusions:

  • O-GlcNAc is a critical regulator of both normal cell cycle progression and the DNA damage response.
  • Understanding O-GlcNAc dynamics offers insights into maintaining genome stability.
  • Further research into O-GlcNAc biology promises significant advancements in cellular regulation and disease understanding.
Keywords:
DNA damage responseO-GlcNAccytokinesismitosisreplication

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