ubiquitin

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u·biq·ui·tin

(ū-bik'kwi-tin), [MIM*191320]
A small (76 amino acyl residues) protein found in all cells of higher organisms and one with a structure that has changed minimally during evolutionary history; involved in at least two processes; histone modification and intracellular protein breakdown.

ubiquitin

(yo͞o-bĭk′wĭ-tĭn)
n.
A small protein found in all eukaryotic cells that attaches to other proteins, thereby regulating their activity or location or marking them for degradation.

ubiquitin

[yo̅o̅bik′witin]
a small polypeptide that is involved in histone modification and is a marker for intracellular protein transport and breakdown. It is found in all cells of higher organisms.

u·bi·qui·tin

(yū-bik'kwi-tin)
A small protein found in all cells of higher organisms; its structure has changed minimally during evolutionary history; involved in histone modification and intracellular protein breakdown.

ubiquitin

A small 76-residue protein found in all animal cells and known to have altered minimally throughout evolutionary history. Ubiquitin is linked by covalent bonds to proteins destined for destruction by PROTEASOMES.

ubiquitin

a small PROTEIN, present in all eukaryotic cells (ubiquitous protein), containing a highly conserved sequence of 76 AMINO ACIDS, that is identical in a wide range of organisms including humans, fish and insects. Ubiquitin is involved in a number of cellular functions, such as protein degradation and modifications to CHROMATIN structure.

ubiquitin (yōōˈ·biˑ·kwi·tin),

n a 76-amino acid polypeptide from modification of histones; present in yeast and in most eukaryotic cells.

ubiquitin

heat shock (cell stress) protein present in mammalian cytosol; attaches to other cytosolic proteins and marks them for degradation either by specific proteases or by lysosomal enzymes.
References in periodicals archive ?
On the other hand, ubiquitins have a subtle trick up their sleeves - they can tag other tags.
When TRAF3 evades attack, it turns that same destructive mechanism against NIK, a protein that is central to NF-kB activity, by tagging it with ubiquitins.
Ubiquitins are small regulatory proteins that attach to other target proteins allowing their destruction and recycling.

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