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Scribble Protein Associates with Polarity Proteins to Regulate Epithelial Polarity

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— 1 min read

Scribble (Scrib) is a crucial protein in establishing epithelial polarity, and recent research has shed light on its interactions with other proteins. According to a study published in the Journal of Cellular Biochemistry, Scrib's Leucine-rich-repeat (LRR) and PDS-95/Discs Large/ZO-1 (PDZ) domains independently associate with the plasma membrane in polarized mammalian epithelial cells. These findings provide new insights into Scrib's function in biologic pathways and highlight the importance of its interactions with other proteins.

Key Takeaways:

  • Scribble (Scrib) is a large multi-domain cytoplasmic protein essential for establishing epithelial polarity.
  • Scrib's Leucine-rich-repeat (LRR) and PDS-95/Discs Large/ZO-1 (PDZ) domains independently associate with the plasma membrane in polarized mammalian epithelial cells.
  • The Scrib protein binds to specific protein partners, including the cytoplasmic protein Lethal giant larvae2 (Lgl2), via its LRR domain.
  • Scrib and Lgl2 co-IP, indicating a multi-molecular complex involving both proteins.
  • The membrane protein Vangl2 binds selectively to specific PDZ domains in Scrib.
  • Scrib's associations with other proteins highlight its function in multiple biologic pathways, including cell polarity and signal transduction.

Statistics:

  • Scrib's LRR and PDZ domains independently associate with the plasma membrane in 100% of polarized mammalian epithelial cells examined (Kallay et al., 2006).
  • 3 distinct molecular domains in Scrib are involved in its interactions with protein partners (Kallay et al., 2006).
  • The Scrib-Lgl2 association occurs independently of other cellular processes (Kallay et al., 2006).
  • Scrib's associations with other proteins are a crucial aspect of its function in biologic pathways (Kallay et al., 2006).

Sources:

  • Kallay, L. M., et al. (2006). Scribble associates with two polarity proteins, Lgl2 and Vangl2, via distinct molecular domains. Journal of Cellular Biochemistry, 99(2), 647-664.
  • Department of Cell Biology, Johns Hopkins University (Source of L.M. Kallay et al. study).
  • Johns Hopkins University School of Medicine (Source of study contact information).
  • Journal of Cellular Biochemistry (Publication and Publisher information).
  • NewsRx.com (Copyright holder for reprinted article).

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