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ubiquitin

American

[yoo-bik-wi-tin] / yuˈbɪk wɪ tɪn /

noun

a small protein, present in all eukaryotic cells, that participates in the destruction of defective proteins and in the synthesis of new proteins.

ubiquitin British

/ juːˈbɪkwɪtɪn /

noun

biochem a small polypeptide, found in most eukaryotic cells, that combines with other proteins to make them susceptible to degradation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

ubiquitination

noun

Etymology

Origin of ubiquitin

First recorded in 1985–90; ubiquit(ous) + -in ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Zinc is essential forRpn11 to catalyze the removal of ubiquitin.

From Science Daily • Apr. 30, 2024

Specifically, CRL5-SPSB3 adds a protein called ubiquitin to cGAS.

From Science Daily • Feb. 28, 2024

This alteration is recognized by a ubiquitin ligase, thus marking the protein for degradation.

From Science Daily • Feb. 21, 2024

A study published today in the journal Molecular Cell describes how the protein ubiquitin is modified during a bacterial infection.

From Science Daily • Dec. 12, 2023

Usually in plants, in fact across all multicellular organisms, this recycling of proteins in the proteasome is dependent on a molecule called ubiquitin.

From Science Daily • Dec. 5, 2023

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023