Ubiquitin
Ubiquitin
Ubiquitin (/juːˈbɪkwɪtɪn/; from the Latin ubique meaning "everywhere") is a small regulatory protein that has been found in almost all tissues (ubiquitously) of eukaryotic organisms.
Etymology
The term "Ubiquitin" is derived from the Latin word ubique, which means "everywhere". This is in reference to the widespread presence of the protein in many different types of cells and tissues.
Function
Ubiquitin is involved in various cellular processes, such as protein degradation, DNA repair, cell cycle regulation, and immune response. It achieves these functions by being covalently attached to other proteins, a process known as ubiquitination.
Structure
Ubiquitin is a small protein composed of 76 amino acids. Despite its small size, it plays a crucial role in the regulation of various cellular processes.
Related Terms
- Ubiquitination: The process by which ubiquitin is attached to a substrate protein.
- Proteasome: A complex that degrades proteins tagged with ubiquitin.
- E3 ubiquitin-protein ligase: An enzyme that facilitates the transfer of ubiquitin to the substrate protein.
- Deubiquitinating enzyme: An enzyme that removes ubiquitin from proteins.
See Also
External links
- Medical encyclopedia article on Ubiquitin
- Wikipedia's article - Ubiquitin
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