Curated modification evidence

O-GlcNAcAtlas

Search experimentally identified protein O-GlcNAcylation sites quickly and reliably.

Current release: O-GlcNAcAtlas 5.0

Curated protein sequence sites and evidence records representing O-GlcNAcAtlas

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About the resource

Experimentally identified sites across species

Protein O-GlcNAcylation has been documented in metazoans—including animals, insects, and plants—as well as some bacteria, fungi, and viruses. It occurs on proteins in the nucleus, cytosol, and mitochondria and functions in a species-, tissue-/cell-, protein-, and site-specific manner.

O-GlcNAcAtlas retains the species, sample, protein, peptide, site, publication, and quantitative context needed to interpret this experimental evidence.

Cite O-GlcNAcAtlas

Junfeng Ma, Yaoxiang Li, Chunyan Hou, and Ci Wu. O-GlcNAcAtlas: A database of experimentally identified O-GlcNAc sites and proteins. Glycobiology. 2021;31(7):719–723. doi:10.1093/glycob/cwab003.

Chunyan Hou, Weiyu Li, Yaoxiang Li, and Junfeng Ma. O-GlcNAcAtlas 4.0: An Updated Protein O-GlcNAcylation Database with Site-specific Quantification. Journal of Molecular Biology. 2025;437(15):169033. doi:10.1016/j.jmb.2025.169033.