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Mena binds α5 integrin directly and modulates α5β1 function.

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 α5β1 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 α5 cytoplasmic tail via a 91-residue region containing 13 five-residue "LERER" repeats. In fibroblasts, the Mena-α5 complex was required for "outside-in" α5β1 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 α5β1-dependent processes involving bidirectional interactions between the extracellular matrix and cytoplasmic focal adhesion proteins.

Pubmed ID: 22908313


  • Gupton SL
  • Riquelme D
  • Hughes-Alford SK
  • Tadros J
  • Rudina SS
  • Hynes RO
  • Lauffenburger D
  • Gertler FB


The Journal of cell biology

Publication Data

August 20, 2012

Associated Grants

  • Agency: NIGMS NIH HHS, Id: GM58801
  • Agency: NCI NIH HHS, Id: U54-CA112967
  • Agency: Howard Hughes Medical Institute, Id:

Mesh Terms

  • Animals
  • Cytoskeletal Proteins
  • Extracellular Matrix
  • Female
  • Fibroblasts
  • Focal Adhesion Protein-Tyrosine Kinases
  • Focal Adhesions
  • Humans
  • Integrin alpha5
  • Integrin alpha5beta1
  • Mice
  • Mice, Mutant Strains
  • NIH 3T3 Cells
  • Pregnancy
  • Protein Transport
  • Rats
  • Signal Transduction