T cell development involves TRAF3IP3-mediated ERK signaling in the Golgi.

ABSTRACT: Generation of T lymphocytes in the thymus is guided by signal transduction from the T cell receptor (TCR), but the underlying mechanism is incompletely understood. Here we have identified a Golgi-associated factor, TRAF3-interacting protein 3 (TRAF3IP3), as a crucial mediator of thymocyte development. TRAF3IP3 deficiency in mice attenuates the generation of mature thymocytes caused by impaired thymocyte-positive selection. TRAF3IP3 mediates TCR-stimulated activation of the mitogen-activated protein kinase (MAPK) extracellular signal-regulated kinase (ERK) and its upstream kinase mitogen/extracellular signal-regulated kinase (MEK). Interestingly, TRAF3IP3 exerts this signaling function through recruiting MEK to the Golgi and, thereby, facilitating the interaction of MEK with its activator B

SUBMITTER: Zou Q 

PROVIDER: S-EPMC4516800 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature