Title: proteasome Long Title: IUPAC Gold Book - proteasome DOI: 10.1351/goldbook.13613 Status: current Definition Cytoplasmic and nuclear multiprotein proteolytic complex involved in degradation of excess, damaged, or misfolded proteins. Note Cytoplasmic proteasome is important in antigen processing and presentation by major histocompatibility complex (MHC) molecules. Related Term - major histocompatibility complex (MHC) molecules: https://goldbook.iupac.org/terms/view/13434 Source - PAC, 2012, 84, 1113. 'IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)' on page 1236 (https://doi.org/10.1351/PAC-REC-11-06-03) Other Outputs - html: https://goldbook.iupac.org/terms/view/13613/html - json: https://goldbook.iupac.org/terms/view/13613/json - xml: https://goldbook.iupac.org/terms/view/13613/xml Citation: Citation: 'proteasome' 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.13613 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . 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: 2026-07-23T21:58:44+00:00