A small protein that becomes covalently linked to a protein targeted for degradation. ultraplankton plankton that are smaller than nannoplankton; they are difficult to separate from water unarmoured - Dinokont-type cells that do not have an identifiable plate series and do not have apical pore complexes.
Ubiquitin is a highly conserved, 76-residue protein that is covalently attached to other proteins. Defined as key term in Biochemistry 1.4.2 Overview of the ubiquitin-proteasome system Molecular Biology 2.8.31 Ubiquitination targets proteins for degradation
A ubiquitous protein that, when attached to a second protein, acts as a tag directing that protein for degradation by the proteosome.
A small protein, present in all eukaryotic cells, which plays an important role in tagging proteins destined for proteolytic cleavage (because they are damaged or no longer needed).
MS = A highly conserved 76-amino acid peptide universally found in eukaryotic cells that functions as a marker for intracellular PROTEIN TRANSPORT and degradation. Ubiquitin becomes activated through a series of complicated steps and forms an isopeptide bond to lysine residues of specific proteins within the cell. These "ubiquitinated" proteins can be recognized and degraded by proteosomes or be transported to specific compartments within the cell. AN = UBIQUITINS UI = D025801
A protein that is covalently attached to lysines of other proteins, tagging them for proteolysis within proteasomes. Multiple ubiquitin units may be ligated to the protein, forming a multiubiquitin chain.
(yoo-BIH-kwe-tin) A small protein that attaches to and marks other proteins for destruction by the proteasome.
Ubiquitin is a very conserved small regulatory protein that is ubiquitous in eukaryotes. Ubiquitination (or Ubiquitylation) refers to the post-translational modification of a protein by the covalent attachment (via an isopeptide bond) of one or more ubiquitin monomers. Ubiquitin (originally, Ubiquitous Immunopoietic Polypeptide) was first identified in 1975 as an 8.5 k Da protein of unknown function expressed universally in living cells.