Words similar to ubiquitination
Example sentences for: ubiquitination
How can you use “ubiquitination” in a sentence? Here are some example sentences to help you improve your vocabulary:
Our results suggest that mammalian COP1 might play a role in ubiquitination (Fig 2).
In addition to the key roles in E3 ligase activity, RING finger domains have also been shown to be important for regulating subcellular localization of E3s and/or their substrates in a number of cases [ 53 54 55 56 ] . Studies have shown the MDM2 RING finger domain is required to promote nuclear export of p53 and this activity of MDM2 RING finger seems to be coupled with its ability to promote ubiquitination of p53 [ 53 54 55 ] . Rbx1/ROC1, the small RING finger subunit of the SCF E3 complexes, promotes the nuclear accumulation of Cul1, another subunit of the SCF complexes [ 56 ] . These studies have suggested a correlation between the ubiquitination activities of RING fingers and their roles in regulating subcellular localization of the E3 ligases which they are part of.
Instead, CIP8, an AtCOP1 interacting RING-H2 finger protein, is found to ubiquitinate HY5 in vitro [ 50 51 ] . Therefore, it is possible that COP1 may recruit other RING finger proteins, such as CIP8, to mediate the ubiquitination of specific substrates.
Evidence for a role of COP1 in protein ubiquitination in vivo
The 26S proteasome is responsible for the bulk turnover of cytoplasmic and nuclear proteins in eukaryotic cells and also plays a key role in the regulation of cell cycle, signal transduction, transcription as well as antigen presentation [ 17 18 19 20 21 ] . Most of the known proteasomal substrates are marked and targeted to proteasome by ubiquitination [ 17 19 20 ] . Ubiquitination, however, is not an obligatory step for substrate targeting to proteasome [ 17 18 20 ] . The degradation of the ornithine decarboxylase (ODC), the rate-limiting enzyme for polyamine synthesis, involves a protein named antizyme (Az), which binds and targets ODC to 26S proteasome for degradation [ 18 ] . However, ODC has remained an "orphan" in Az-dependent proteasomal degradation.
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