# |
PMID |
Sentence |
1 |
11717410
|
Atrogin-1, a muscle-specific F-box protein highly expressed during muscle atrophy.
|
2 |
11717410
|
It contains a functional F-box domain that binds to Skp1 and thereby to Roc1 and Cul1, the other components of SCF-type Ub-protein ligases (E3s), as well as a nuclear localization sequence and PDZ-binding domain.
|
3 |
11717410
|
Atrogin-1 is one of the few examples of an F-box protein or Ub-protein ligase (E3) expressed in a tissue-specific manner and appears to be a critical component in the enhanced proteolysis leading to muscle atrophy in diverse diseases.
|
4 |
16714087
|
FBXO25, an F-box protein homologue of atrogin-1, is not induced in atrophying muscle.
|
5 |
16714087
|
Atrogin-1/MAFbx/FBXO32 is a muscle-specific ubiquitin-ligase (E3) that is dramatically increased in atrophying muscle.
|
6 |
16714087
|
Here, we have investigated the functional relationship between atrogin-1 and FBXO25 which shares 65% amino acid identity.
|
7 |
16714087
|
Using a RT-PCR, we demonstrated that FBXO25 is highly expressed in brain, kidney, and intestine, whereas atrogin-1 expression is largely restricted to striate muscle.
|
8 |
16714087
|
FBXO25 was shown here to contain a functional F-box domain that binds to Skp1 and thereby to Roc1 and Cul1, the major components of SCF-type E3s.
|
9 |
16714087
|
In addition, the productive SCF complex containing FBXO25 showed ubiquitin ligase activity.
|
10 |
16714087
|
We investigated the differential expression of atrogin-1 and FBXO25 in fasted and dexamethasone-treated mice and also in rats with streptozotocin-induced diabetes.
|
11 |
16714087
|
Although the atrogin-1 was strongly induced in muscle in all three models, no changes were observed in the expression of FBXO25.
|
12 |
16714087
|
Therefore, here we have shown that FBXO25 is a novel F-box protein analogous to atrogin-1, which is not involved in muscle atrophy.
|
13 |
16714087
|
Further functional studies should elucidate the exact role of FBXO25 in the ubiquitin-proteasome pathway.
|