Learn More
Two cytoplasmic variants of the alpha 6 integrin, alpha 6A and alpha 6B, have been identified previously (Hogervorst, F., I. Kuikman, A. G. van Kessel, and A. Sonnenberg. 1991. Eur. J. Biochem. 199:425-433; Cooper, H. M., R. N. Tamura, and V. Quaranta. 1991. J. Cell Biol. 115:843-850). Using synthetic peptides, containing sequences of their cytoplasmic(More)
Cell surface receptors integrate chemical and mechanical cues to regulate a wide range of biological processes. Integrin complexes are the mechanotransducers between the extracellular matrix and the actomyosin cytoskeleton. By analogy, cadherin complexes may function as mechanosensors at cell-cell junctions, but this capacity of cadherins has not been(More)
Adhesion of platelets to the subendothelial matrix of an injured vessel wall is an essential step in triggering the formation of a haemostatic plug. Fibronectin, collagen and laminin are three major components of the subendothelial matrix which support platelet adhesion. Receptors for fibronectin and collagen have been identified on platelets and are(More)
Binding between sperm and egg plasma membranes is an essential step in fertilization. Whereas fertilin, a mammalian sperm surface protein, is involved in this crucial interaction, sperm receptors on the egg plasma membrane have not been identified. Because fertilin contains a predicted integrin ligand domain, we investigated the expression and function of(More)
During wound healing, angiogenesis, and tumor invasion, cells often change their expression profiles of fibronectin-binding integrins. Here, we show that beta1 integrins promote random migration, whereas beta3 integrins promote persistent migration in the same epithelial cell background. Adhesion to fibronectin by alpha(v)beta3 supports extensive actin(More)
BACKGROUND Integrins are heterodimeric αβ transmembrane receptors that play key roles in cellular physiology and pathology. Accumulating data indicate that the two NPxY motifs in the cytoplasmic domain of the β1 subunit synergistically promote integrin activation through the binding of talin and kindlin. However, it is unclear how the individual motifs(More)
Despite their importance in cell biology, the mechanisms that maintain the nucleus in its proper position in the cell are not well understood. This is primarily the result of an incomplete knowledge of the proteins in the outer nuclear membrane (ONM) that are able to associate with the different cytoskeletal systems. Two related ONM proteins, nuclear(More)
CD151 is a cell surface protein that belongs to the tetraspan superfamily. It associates with other tetraspan molecules and certain integrins to form large complexes at the cell surface. CD151 is expressed by a variety of epithelia and mesenchymal cells. We demonstrate here that in human skin CD151 is codistributed with alpha3beta1 and alpha6beta4 at the(More)
Laminins and their integrin receptors are implicated in epithelial cell differentiation and progenitor cell maintenance. We report here that a previously unrecognized subpopulation of mouse alveolar epithelial cells (AECs) expressing the laminin receptor α6β4, but little or no pro-surfactant C (pro-SPC), is endowed with regenerative potential. Ex vivo, this(More)
e have studied the formation of different types of cell matrix adhesions in cells that bind to fibronec-tin via either ␣ 5 ␤ 1 or ␣ v ␤ 3. In both cases, cell adhesion to fibronectin leads to a rapid decrease in RhoA activity. However, ␣ 5 ␤ 1 but not ␣ v ␤ 3 supports high levels of RhoA activity at later stages of cell spreading, which are associated with(More)