+ |
MGRN1 | up-regulates activity
monoubiquitination
|
TSG101 |
0.506 |
Identifier |
Residue |
Sequence |
Organism |
Cell Line |
SIGNOR-271635 |
|
|
Homo sapiens |
HeLa Cell |
pmid |
sentence |
17229889 |
In the present study, we identified the first substrate of the Mahogunin E3 ubiquitin–protein ligase: TSG101, a key component of the endosomal sorting ESCRT machinery.We find that Mahogunin interacts with the ubiquitin E2 variant (UEV) domain of TSG101 via its PSAP motif and that it catalyzes monoubiquitylation of TSG101 both in vivo and in vitro. Consistent with the results of the biochemical characterization and subcellular localization studies of Mahogunin, our functional studies provide direct evidence that Mahogunin plays an essential role in regulation of endosome-to-lysosome trafficking. We found that siRNA-mediated depletion of Mahogunin in HeLa cells causes enlargement and clustering of EEA1-positive endosomes and LAMP2-positive late endosomes/lysosomes (Figure 8B) and inhibits the endosomal trafficking of internalized EGF–EGFR complexes to lysosomes for degradation (Figures 9 and and10,10, A and B). These results are strikingly similar to the phenotypes that resulted from depletion of TSG101 |
|
Publications: |
1 |
Organism: |
Homo Sapiens |
+ |
LRSAM1 | down-regulates quantity
monoubiquitination
|
TSG101 |
0.543 |
Identifier |
Residue |
Sequence |
Organism |
Cell Line |
SIGNOR-271509 |
|
|
Homo sapiens |
HEK-293 Cell |
pmid |
sentence |
15256501 |
Tal increases ubiquitylation of Tsg101 and affects its solubility in a RING- and PTAP-dependent manner. Tal-mediated ubiquitylation of Tsg101 inactivates this sorting function and concomitantly translocates Tsg101 from relatively insoluble membrane subdomains. Presumably, the coordinated action of Tal and a deubiquitylation enzyme (DUB) enables recycling of Tsg101 and reloading of cargo. |
|
Publications: |
1 |
Organism: |
Homo Sapiens |
+ |
TAL1 | down-regulates quantity by destabilization
polyubiquitination
|
TSG101 |
0.2 |
Identifier |
Residue |
Sequence |
Organism |
Cell Line |
SIGNOR-271636 |
|
|
Homo sapiens |
HeLa Cell |
pmid |
sentence |
17229889 |
These data suggest that Tal mediates polyubiquitylation of the lysine residues in the VPS28-binding region of TSG101, leading to subsequent degradation of TSG101. |
|
Publications: |
1 |
Organism: |
Homo Sapiens |