Words similar to ubiquitin
Example sentences for: ubiquitin
How can you use “ubiquitin” in a sentence? Here are some example sentences to help you improve your vocabulary:
Studies in budding yeast identified SCF Cdc4p, an E3 ubiquitin ligase complex that mediates the ubiquitylation of the CDK inhibitor Sic1p [ 3 4 ] . SCF Cdc4pconsists of at least four proteins: the cullin Cdc53p, the RING domain protein Hrt1p/Rbx1p/Roc1p, the adapter protein Skp1p, and Cdc4p (reviewed in [ 1 ] ). Cdc4p contains two sequence motifs, which are conserved in a wide variety of so-called F-box proteins: C-terminal WD-repeats that are involved in binding the substrate Sic1p in a phosphorylation-dependent manner, and a central F-box [ 5 ] that interacts with Skp1p [ 6 7 ] . Cdc53p in turn binds to Skp1p and Hrt1p/Rbx1p/Roc1p, which bridges Cdc53p with the ubiquitin-conjugating enzyme Cdc34p/Ubc3p [ 6 8 9 10 11 12 ] . In vitro reconstitution demonstrated that SCF Cdc4p, Cdc34p, E1, ubiquitin, and ATP are sufficient to mediate Sic1p polyubiquitylation [ 6 7 ] .
As Pcu3p-associated ubiquitin ligase activity was not described before, we first needed to determine which of the fourteen different ubiquitin-conjugating enzymes (UBCs) present in the fission yeast genome associate with the RING domain protein Pip1p, an essential cofactor of cullin ubiquitin ligases [ 7, 28, 29, 30].
Regardless of the exact mechanism, CSN may regulate the activity of multiple cullin ubiquitin ligases through counteracting their stimulatory Ned8p modification.
In fact, p27 depletion in several cancers was shown to result from increased proteolysis via the ubiquitin/proteasome system [ 15 16 17 18 ] .
Within the past few years, the RING finger motif has emerged as a core structure feature for many ubiquitin ligases (E3s) [ 52 ] . In most cases, RING fingers function as E2 recruiting domains, and by directly interacting with E2s, bring E2s in the vicinity of ubiquitination substrates, which bind to other parts of the RING finger proteins or other subunits of the RING finger protein containing complexes.
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