| + |
UBE4B | down-regulates quantity by destabilization 
polyubiquitination
|
ATXN3 |
0.595 |
| Identifier |
Residue |
Sequence |
Organism |
Cell Line |
| SIGNOR-271502 |
|
|
Homo sapiens |
HEK-293 Cell |
| pmid |
sentence |
| 14749733 |
Mammalian E4B (UFD2a), a ubiquitin chain assembly factor (E4), copurified with the polyubiquitylation activity for ataxin-3. E4B interacted with, and thereby mediated polyubiquitylation of, ataxin-3. Collectively, these data suggest that E4B promotes the degradation of ataxin-3, and that this effect surmounts the stabilization of ataxin-3 conferred by expansion of the polyglutamine tract. |
|
| Publications: |
1 |
Organism: |
Homo Sapiens |
| + |
UBE4B | up-regulates activity 
polyubiquitination
|
FEZ1 |
0.4 |
| Identifier |
Residue |
Sequence |
Organism |
Cell Line |
| SIGNOR-271510 |
|
|
Rattus norvegicus |
PC-12 Cell |
| pmid |
sentence |
| 15466860 |
E4B mediated the polyubiquitylation of FEZ1 but did not affect its intracellular stability, suggesting that such modification of FEZ1 is not a signal for its proteolysis. Polyubiquitylation of FEZ1 by E4B required Lys(27) of ubiquitin. Expression of a dominant-negative mutant of E4B in rat pheochromocytoma PC12 cells resulted in inhibition of neurite extension induced either by nerve growth factor or by coexpression of FEZ1 and constitutively active PKCzeta. These findings indicate that E4B serves as a ubiquitin ligase for FEZ1 and thereby regulates its function but not its degradation. The polyubiquitin chain attached by E4B to FEZ1 might therefore facilitate the interaction of FEZ1 with an unidentified target that functions in neuritogenesis. |
|
| Publications: |
1 |
Organism: |
Rattus Norvegicus |
| + |
UBE4B | down-regulates quantity by destabilization
polyubiquitination
|
PTTG1 |
0.2 |
| Identifier |
Residue |
Sequence |
Organism |
Cell Line |
| SIGNOR-271523 |
|
|
Homo sapiens |
|
| pmid |
sentence |
| 15611659 |
We further demonstrate that Ufd2 directly and efficiently ubiquitylates securin in vitro and is required for securin polyubiquitylation in vivo. This is the first description of a physiologic substrate for Ufd2, establishing this E4 enzyme as an important regulator of chromosome condensation and separation during mitosis in human cells. |
|
| Publications: |
1 |
Organism: |
Homo Sapiens |
| + |
UBE4B | down-regulates quantity by destabilization
polyubiquitination
|
TP53 |
0.405 |
| Identifier |
Residue |
Sequence |
Organism |
Cell Line |
| SIGNOR-271907 |
|
|
Homo sapiens |
NCI-H1299 Cell |
| pmid |
sentence |
| 21317885 |
We show that ubiquitination factor E4B (UBE4B), an E3 and E4 ubiquitin ligase, physically interacts with p53 and Hdm2 (also known as Mdm2 in mice). UBE4B promotes p53 polyubiquitination and degradation and inhibits p53-dependent transactivation and apoptosis. |
|
| Publications: |
1 |
Organism: |
Homo Sapiens |
| + |
Ub:E2 | up-regulates activity
ubiquitination
|
UBE4B |
0.2 |
| Identifier |
Residue |
Sequence |
Organism |
Cell Line |
| SIGNOR-271275 |
|
|
Homo sapiens |
|
| pmid |
sentence |
| 34199813 |
The ubiquitination process is mediated sequentially by three classes of enzymes consisting of a Ub-activating enzyme E1, a Ub-conjugating enzyme E2, and a Ub ligase E3. Ub is first activated by E1 in an adenosine 5′-triphosphate (ATP)-dependent manner t |
|
| Publications: |
1 |
Organism: |
Homo Sapiens |
3.0
UBE4B
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