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The Scribble Cell Polarity Module in the Regulation of Cell Signaling in Tissue Development and Tumorigenesis

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The Scribble cell polarity module, comprising Scribbled (Scrib), Discs-large (Dlg) and Lethal-2-giant larvae (Lgl), has a tumor suppressive role in mammalian epithelial cancers. The Scribble module proteins play key functions in the establishment and maintenance of different modes of cell polarity, as well as in the control of tissue growth, differentiation and directed cell migration, and therefore are major regulators of tissue development and homeostasis. Whilst molecular details are known regarding the roles of Scribble module proteins in cell polarity regulation, their precise mode of action in the regulation of other key cellular processes remains enigmatic. An accumulating body of evidence indicates that Scribble module proteins play scaffolding roles in the control of various signaling pathways, which are linked to the control of tissue growth, differentiation and cell migration. Multiple Scrib, Dlg and Lgl interacting proteins have been discovered, which are involved in diverse processes, however many function in the regulation of cellular signaling. Herein, we review the components of the Scrib, Dlg and Lgl protein interactomes, and focus on the mechanism by which they regulate cellular signaling pathways in metazoans, and how their disruption leads to cancer.


This work was supported by an National Health and Medical Research Council Australia (NHMRC) Project Grant (APP1103871) to MK, POH and HER, an NHMRC Fellowship (APP1020056) to PH, an Australian Research Council Fellowship (FT130101349) to MK, a Juan de la Cierva-Incorporacion postdoctoral fellowship (IJCI-2014-19272) from the Spanish Ministerio de Ciencia e Innovacion (MICINN) to MP, a Australian Government RTP Scholarship to RS, and funds from La Trobe University and the La Trobe Institute of Molecular Science to HER.


Publication Date



Journal of Molecular Biology






28p. (p. 3585-3612)





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