| First Author | Gupton SL | Year | 2012 |
| Journal | J Cell Biol | Volume | 198 |
| Issue | 4 | Pages | 657-76 |
| PubMed ID | 22908313 | Mgi Jnum | J:190748 |
| Mgi Id | MGI:5449650 | Doi | 10.1083/jcb.201202079 |
| Citation | Gupton SL, et al. (2012) Mena binds alpha5 integrin directly and modulates alpha5beta1 function. J Cell Biol 198(4):657-76 |
| abstractText | Mena is an Ena/VASP family actin regulator with roles in cell migration, chemotaxis, cell-cell adhesion, tumor cell invasion, and metastasis. Although enriched in focal adhesions, Mena has no established function within these structures. We find that Mena forms an adhesion-regulated complex with alpha5beta1 integrin, a fibronectin receptor involved in cell adhesion, motility, fibronectin fibrillogenesis, signaling, and growth factor receptor trafficking. Mena bound directly to the carboxy-terminal portion of the alpha5 cytoplasmic tail via a 91-residue region containing 13 five-residue "LERER" repeats. In fibroblasts, the Mena-alpha5 complex was required for "outside-in" alpha5beta1 functions, including normal phosphorylation of FAK and paxillin and formation of fibrillar adhesions. It also supported fibrillogenesis and cell spreading and controlled cell migration speed. Thus, fibroblasts require Mena for multiple alpha5beta1-dependent processes involving bidirectional interactions between the extracellular matrix and cytoplasmic focal adhesion proteins. |
