| First Author | Lee MF | Year | 2006 |
| Journal | Biochem Biophys Res Commun | Volume | 348 |
| Issue | 3 | Pages | 826-31 |
| PubMed ID | 16899217 | Mgi Jnum | J:111977 |
| Mgi Id | MGI:3655314 | Doi | 10.1016/j.bbrc.2006.07.126 |
| Citation | Lee MF, et al. (2006) Magicin associates with the Src-family kinases and is phosphorylated upon CD3 stimulation. Biochem Biophys Res Commun 348(3):826-31 |
| abstractText | We recently identified a novel actin cytoskeleton-associated protein magicin, for merlin and Grb2 interacting cytoskeletal protein. To unravel the cellular functions of magicin, we used a yeast two-hybrid system and identified Fyn tyrosine kinase as a specific binding partner for magicin. Fyn phosphorylates magicin in vitro. In addition to Fyn, Src and Lck also interact with magicin. Upon stimulation with anti-CD3 antibody, magicin is phosphorylated in the T lymphocyte leukemia Jurkat cell line. Magicin phosphorylation is not observed in an Lck-deficient line, J.CaM1.6, indicating that Lck is the major Src family kinase for phosphorylating magicin in Jurkat cells. Employing site-directed mutagenesis along with in vitro kinase assays, we found that Y64 of magicin is phosphorylated by Lck creating a SH2-Grb2 binding motif. Magicin has also been identified as a Mediator subunit (MED28) in the nucleus involved in transcriptional regulation, therefore we propose that magicin may serve as a multi-faceted adaptor/scaffold to relay cellular signaling to the cytoskeleton and from the cytoskeleton to the nucleus. |
