HealthAugust 13, 2026

ubiquitin

yoo-BIK-wuh-tin

Definition

A small regulatory protein that marks other proteins for degradation within a cell, acting as a tag to direct them to the proteasome.

Etymology

Derived from the Latin 'ubique,' meaning 'everywhere,' because this protein is found in almost all living cells and is highly conserved across species.

In the news

The article describes the ubiquitin-proteasome system as the mechanism through which the protein KEAP1 tags NRF2 for destruction, maintaining cellular balance.

How Obesity Triggers Cellular Stress Through Unfolded Protein Response and NRF2 Signaling

Read the full article ↗

Bioengineer.org

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