Molecular mechanisms of protein and lipid targeting to ciliary membranes

Brian T. Emmer, Danijela Maric, David M. Engman

Research output: Contribution to journalComment/debatepeer-review

95 Scopus citations

Abstract

Cilia are specialized surface regions of eukaryotic cells that serve a variety of functions, ranging from motility to sensation and to regulation of cell growth and differentiation. The discovery that a number of human diseases, collectively known as ciliopathies, result from defective cilium function has expanded interest in these structures. Among the many properties of cilia, motility and intraflagellar transport have been most extensively studied. The latter is the process by which multiprotein complexes associate with microtubule motors to transport structural subunits along the axoneme to and from the ciliary tip. By contrast, the mechanisms by which membrane proteins and lipids are specifically targeted to the cilium are still largely unknown. In this Commentary, we review the current knowledge of protein and lipid targeting to ciliary membranes and outline important issues for future study. We also integrate this information into a proposed model of how the cell specifically targets proteins and lipids to the specialized membrane of this unique organelle.

Original languageEnglish (US)
Pages (from-to)529-536
Number of pages8
JournalJournal of Cell Science
Volume123
Issue number4
DOIs
StatePublished - Feb 15 2010

Keywords

  • Cilia
  • Intraflagellar transport
  • Lipid rafts
  • Palmitoylation
  • Targeting

ASJC Scopus subject areas

  • Cell Biology

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