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Mapping Dysfunctional Protein-Protein Interactions in Disease
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OGT's inner circle: Protein interactions and functional impact.

Fiddia Zahra1, Natasha E Zachara2

  • 1The Department of Biophysics and Biophysical Chemistry at the Johns Hopkins University School of Medicine, Baltimore, MD, 21202, USA; The Graduate Program in Biological Chemistry, at the Johns Hopkins University School of Medicine, Baltimore, MD, 21202, USA.

Advances in Biological Regulation
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Summary
This summary is machine-generated.

O-linked β-N-acetylglucosamine (O-GlcNAc) is a crucial protein modification affecting many cellular processes. Understanding how O-GlcNAc transferase (OGT) achieves broad substrate specificity through its interactors is key to deciphering its role in health and disease.

Keywords:
GlycosylationInteractomeIntracellularO-GlcNAcO-GlcNAc transferaseSignalingUDP-GlcNAc

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cellular Biology

Background:

  • O-linked β-N-acetylglucosamine (O-GlcNAc) is a vital post-translational modification in mammals, modifying over 5000 proteins.
  • O-GlcNAcylation influences critical cellular functions including signal transduction, epigenetics, transcription, translation, and bioenergetics.
  • Dysregulation of O-GlcNAc is linked to diseases like metabolic disorders, cancer, neurodegeneration, and heart failure.

Purpose of the Study:

  • To explore the mechanisms underlying the broad substrate specificity of O-GlcNAc transferase (OGT).
  • To review the diverse network of protein partners that mediate OGT's localization, activity, and substrate selectivity.
  • To investigate the roles of post-translational modifications and substrate availability in OGT regulation.

Main Methods:

  • Literature review of OGT interactors and their functional roles.
  • Analysis of studies investigating OGT regulation and substrate specificity.
  • Discussion of the impact of protein partners on OGT function.

Main Results:

  • OGT's functional versatility is proposed to be mediated by interactions with a diverse network of protein partners.
  • These interactors act as adaptors, scaffolds, or substrates, influencing OGT's localization, activity, and substrate selectivity.
  • Post-translational modifications and substrate availability are significant factors in OGT regulation and specificity.

Conclusions:

  • Understanding OGT interactors is crucial for elucidating its role in diverse cellular processes and disease.
  • The complex regulatory network surrounding OGT contributes to its broad substrate specificity.
  • Further research into OGT regulation and its interactome holds therapeutic potential for O-GlcNAc-related diseases.