
doi: 10.1038/nature01082
pmid: 12422220
The ability of cells to form cell contacts, adhere to the extracellular matrix, change morphology, and migrate is essential for development, wound healing, metastasis, cell survival and the immune response. These events depend on the binding of integrin to the extracellular matrix, and assembly of focal adhesions, which are complexes comprising scaffolding and signalling proteins organized by adhesion to the extracellular matrix. Phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P(2)) regulates interactions between these proteins, including the interaction of vinculin with actin and talin. The binding of talin to beta-integrin is strengthened by PtdIns(4,5)P(2), suggesting that the basis of focal adhesion assembly is regulated by this lipid mediator. Here we show that the type I phosphatidylinositol phosphate kinase isoform-gamma 661 (PIPKI gamma 661), an enzyme that makes PtdIns(4,5)P(2), is targeted to focal adhesions by an association with talin. PIPKI gamma 661 is tyrosine phosphorylated by focal adhesion associated kinase signalling, increasing both the activity of phosphatidylinositol phosphate kinase and its association with talin. This defines a mechanism for spatial generation of PtdIns(4,5)P(2) at focal adhesions.
Phosphatidylinositol 4,5-Diphosphate, Talin, Focal Adhesions, Binding Sites, Integrin beta Chains, Recombinant Fusion Proteins, Cell Membrane, Protein-Tyrosine Kinases, Actins, Vinculin, Cell Line, Rats, Isoenzymes, Mice, Phosphotransferases (Alcohol Group Acceptor), Focal Adhesion Kinase 1, Focal Adhesion Protein-Tyrosine Kinases, Animals, Humans, Protein Binding
Phosphatidylinositol 4,5-Diphosphate, Talin, Focal Adhesions, Binding Sites, Integrin beta Chains, Recombinant Fusion Proteins, Cell Membrane, Protein-Tyrosine Kinases, Actins, Vinculin, Cell Line, Rats, Isoenzymes, Mice, Phosphotransferases (Alcohol Group Acceptor), Focal Adhesion Kinase 1, Focal Adhesion Protein-Tyrosine Kinases, Animals, Humans, Protein Binding
| citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 420 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 1% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 1% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 1% |
