Interplay between the cell polarity protein SCRIB and signaling proteins in breast cancer
Abstract
Cell polarity is fundamental for the architecture and function of all body tissues by determining crucial cellular functions such as asymmetric cell division and cell migration. Normal epithelial cells are a typical example of polarized cells (apico-basal polarity) with the apical surface exposed to the lumen and the basal surface attached to the basement membrane. Three main protein complexes are responsible for the establishment of cell polarity, the Crumbs (Crumbs3-PALS1-PATJ) and Par (Par3-Par6-aPKC) complexes identify the apical domain of the cell, while the Scribble complex [lethal giant larvae (Lgl) - Scribble (Scrib) - Disc large (Dlg)] defines the basal domain. In epithelial cells, polarity proteins are recruited at intercellular connections where they associate with adhesion proteins as well as other proteins, components of signaling pathways that regulate cell growth, differentiation, apoptosis and epithelial-mesenchymal transition (EMT). Alterations of Scrib polarity gene s ...
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