STAC2 negatively regulates osteoclast formation by targeting the RANK signaling complex.
Cell Death Differ
; 25(8): 1364-1374, 2018 08.
Article
em En
| MEDLINE
| ID: mdl-29348675
ABSTRACT
The receptor activator of nuclear factor-κB (RANK) protein activates various protein kinase signaling cascades, including those involving NF-κB, mitogen-activated protein kinase (MAPK), and Bruton tyrosine kinase (Btk)/tyrosine-protein kinase Tec. However, the mechanism underlying the negative regulation of RANK by downstream signaling molecules remains unclear. Here, we report that Src homology 3 domain and cysteine-rich domain-containing protein 2 (STAC2) is a novel RANK ligand-inducible protein that negatively regulates RANK-mediated osteoclast formation. STAC2 physically interacts with RANK and inhibits the formation of the RANK signaling complex, which contains Grb-2-associated binder 2 (Gab2) and phospholipase Cγ2 (PLCγ2), thus leading to the suppression of RANK-mediated NF-κB and MAPK activation. Furthermore, STAC2 overexpression limits Btk/Tec-mediated PLCγ2 phosphorylation via the interaction between STAC2 and Btk/Tec. Taken together, our results reveal a novel mechanism whereby RANK signaling is restricted by its physical interaction with STAC2.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Transdução de Sinais
/
Receptor Ativador de Fator Nuclear kappa-B
/
Proteínas do Tecido Nervoso
Limite:
Animals
Idioma:
En
Revista:
Cell Death Differ
Ano de publicação:
2018
Tipo de documento:
Article