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Título

CD3 epsilon recruits Numb to promote TCR degradation

AutorMartín-Blanco, Nadia M.; Jiménez Teja, Daniel; Bretones, Gabriel CSIC ORCID; Borroto Revuelta, Aldo; Caraballo, Michael; Screpanti, I.; Leon, Javier; Alarcón, Balbino CSIC ORCID; Cañelles, Matilde CSIC ORCID
Palabras clavelymphocyte signaling
T-cell activation
T-cell differentiation
T-cell receptor
Fecha de publicaciónmar-2016
EditorOxford University Press
CitaciónInternational Immunology
ResumenModulation of TCR signaling upon ligand binding is achieved by changes in the equilibrium between TCR degradation, recycling and synthesis; surprisingly, the molecular mechanism of such an important process is not fully understood. Here, we describe the role of a new player in the mediation of TCR degradation: the endocytic adaptor Numb. Our data show that Numb inhibition leads to abnormal intracellular distribution and defective TCR degradation in mature T lymphocytes. In addition, we find that Numb simultaneously binds to both Cbl and a site within CD3 epsilon that overlaps with the Nck binding site. As a result, Cbl couples specifically to the CD3 epsilon chain to mediate TCR degradation. The present study unveils a novel role of Numb that lies at the heart of TCR signaling initiation and termination.
URIhttp://hdl.handle.net/10261/195696
DOI10.1093/intimm/dxv060
ISSN0953-8178
E-ISSN1460-2377
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