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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cellular Biology

Background:

  • Protein O-GlcNAcylation, a post-translational modification of serine and threonine residues, is conserved across organisms and crucial for biological processes.
  • Research on O-GlcNAcylation has expanded significantly, with ~1700 articles published over 35 years, and the O-GlcNAcome now includes over 5000 identified human proteins.

Purpose of the Study:

  • To create an extensive, publicly accessible inventory of human O-GlcNAcylated proteins, their modification sites, and identification methods.
  • To develop a more robust semi-consensus sequence for O-GlcNAcylation based on sequence analysis.
  • To conduct a comprehensive meta-analysis of human O-GlcNAcylated proteins regarding their domains, cellular/tissue distribution, and roles in health and disease.

Main Methods:

  • Compilation of data from scientific literature to create a comprehensive database of human O-GlcNAcylated proteins and sites.
  • Bioinformatic analysis of amino acid sequences surrounding 7002 identified O-GlcNAc sites.
  • Meta-analysis of protein domains, cellular and tissue distribution, and associated pathways.

Main Results:

  • An extensive inventory of human O-GlcNAcylated proteins and their O-GlcNAc sites is now available at www.oglcnac.mcw.edu, serving as the sole database for this information.
  • Analysis of 7002 O-GlcNAc sites has led to progress in defining a more robust semi-consensus sequence for O-GlcNAcylation.
  • Meta-analysis reveals O-GlcNAcylation's widespread roles in cellular signaling, protein domains, tissue distribution, and involvement in various health and disease pathways.

Conclusions:

  • O-GlcNAcylation is a critical and highly conserved post-translational modification regulating fundamental biological processes.
  • The established database and sequence analysis provide essential resources for researchers studying O-GlcNAcylation.
  • O-GlcNAcylation acts as a master regulator of cell signaling, comparable in importance to phosphorylation.