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ZFIN ID: ZDB-PUB-160602-2
aPKC regulates apical localization of Lgl to restrict elongation of microridges in developing zebrafish epidermis
Raman, R., Damle, I., Rote, R., Banerjee, S., Dingare, C., Sonawane, M.
Date: 2016
Source: Nature communications 7: 11643 (Journal)
Registered Authors: Sonawane, Mahendra
Keywords: Biological sciences, Cell biology
MeSH Terms:
  • Actin Cytoskeleton/genetics
  • Actin Cytoskeleton/metabolism
  • Actin Cytoskeleton/ultrastructure
  • Actins/genetics
  • Actins/metabolism
  • Animals
  • Animals, Genetically Modified
  • Cell Polarity
  • Embryo, Nonmammalian
  • Embryonic Development/genetics
  • Epidermis/cytology
  • Epidermis/growth & development
  • Epidermis/metabolism*
  • Epithelial Cells/metabolism*
  • Epithelial Cells/ultrastructure
  • Gene Expression Regulation, Developmental
  • Glycoproteins/antagonists & inhibitors
  • Glycoproteins/genetics
  • Glycoproteins/metabolism*
  • Morpholinos/genetics
  • Morpholinos/metabolism
  • Myosin Type II/genetics
  • Myosin Type II/metabolism
  • Protein Kinase C/genetics
  • Protein Kinase C/metabolism*
  • Zebrafish/genetics*
  • Zebrafish/growth & development
  • Zebrafish/metabolism
  • Zebrafish Proteins/antagonists & inhibitors
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/metabolism*
PubMed: 27249668 Full text @ Nat. Commun.
Epithelial cells exhibit apical membrane protrusions, which confer specific functions to epithelial tissues. Microridges are short actin protrusions that are laterally long and form a maze-like pattern in the apical domain. They are widely found on vertebrate squamous epithelia including epidermis and have functions in mucous retention, membrane storage and abrasion resistance. It is largely unknown how the formation of these laterally long actin projections is regulated. Here, we show that antagonistic interactions between aPKC and Lgl-regulators of apical and basolateral domain identity, respectively,-control the length of microridges in the zebrafish periderm, the outermost layer of the epidermis. aPKC regulates the levels of Lgl and the active form of non-muscle myosinII at the apical cortex to prevent actin polymerization-dependent precocious fusion and elongation of microridges. Our data unravels the functional significance of exclusion of Lgl from the apical domain in epithelial cells.