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Innexins in C. elegans.

T Starich1, M Sheehan, J Jadrich

  • 1Dept. Genetics, Cell Biology and Development, University of Minnesota, St. Paul 55108, USA. todd@biosci.cbs.umn.edu

Cell Communication & Adhesion
|June 18, 2002
PubMed
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Innexins, crucial gap junction proteins in invertebrates like C. elegans, are vital for development and neural wiring. This study maps their expression and identifies mutations, revealing complex expression patterns and potential functional pairings.

Area of Science:

  • * Molecular and developmental biology
  • * Invertebrate neurobiology
  • * Cell-to-cell communication

Background:

  • * Innexins are invertebrate gap junction proteins analogous to vertebrate connexins.
  • * The C. elegans genome contains 25 innexin genes.
  • * Gap junctions are implicated in embryonic development and nervous system wiring.

Purpose of the Study:

  • * To identify C. elegans innexins involved in embryonic development and neural wiring.
  • * To characterize the expression patterns and functions of C. elegans innexins.

Main Methods:

  • * Generation of specific antibodies against innexin carboxyl termini.
  • * Construction and observation of translational GFP fusions for innexin expression.
  • * Investigation of mutant, RNAi, and overexpression phenotypes.

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Main Results:

  • * Expression patterns characterized for 14 out of 25 C. elegans innexins.
  • * Mutations identified in 5 innexin genes; RNAi phenotypes observed for at least 3 others.
  • * Findings indicate widespread co-expression of multiple innexins in tissues and cells, with varied expression levels and potential for functional pairing.

Conclusions:

  • * Innexin expression is complex, with multiple innexins often co-expressed within the same cells and tissues.
  • * Diverse expression patterns suggest specialized roles for different innexins.
  • * The potential for functional innexin pairing offers insights into the combinatorial control of gap junction communication.