Scrib module proteins: Control of epithelial architecture and planar spindle orientation

Area of Science:

• Cell Biology
• Developmental Biology
• Cancer Biology

Background:

• The Scrib module (Scrib, Dlg, Lgl) comprises conserved proteins crucial for cell polarity.
• These proteins were initially identified as neoplastic tumor suppressors in Drosophila melanogaster.
• Disruption of the Scrib module is implicated in mammalian epithelial tumorigenesis and human cancers.

Purpose of the Study:

• To review the molecular functions and physiological roles of the Scrib module proteins.
• To focus on in vivo studies elucidating Scrib module functions.
• To provide a framework for understanding how Scrib module dynamics impact epithelial organization.

Main Methods:

• This review synthesizes findings from various in vivo studies.
• Analysis of genetic and molecular data related to Scrib module components.
• Integration of research on cell polarity, epithelial architecture, and tumorigenesis.

Main Results:

• Scrib module proteins determine basolateral identity in polarized epithelial cells.
• They function as scaffold proteins in signaling pathways.
• Novel roles in polarity establishment, tricellular junction formation, and spindle orientation have been uncovered.

Conclusions:

• The Scrib module is essential for maintaining epithelial architecture and cell polarity.
• Understanding Scrib module dynamics is key to comprehending epithelial organization.
• Further research into these proteins could offer insights into cancer development and treatment.