Title: ubiquitin
Long Title: IUPAC Gold Book - ubiquitin
DOI: 10.1351/goldbook.13767
Status: current

Definition
Highly conserved 76 amino acid peptide abundant in eukaryotic cells. Its covalent attachment to a protein by a ubiquitin ligase complex targets that protein for destruction by the proteasome.

Related Term
- proteasome: https://goldbook.iupac.org//terms/view/13613

Source
- PAC, 2012, 84, 1113. 'IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)' on page 1257 (https://doi.org/10.1351/PAC-REC-11-06-03)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/13767/html
- json: https://goldbook.iupac.org/terms/view/13767/json
- xml: https://goldbook.iupac.org/terms/view/13767/xml

Citation: Citation: 'ubiquitin' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.13767
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-07-29T08:39:33+00:00