Spatial distribution of intraflagellar transport proteins in vertebrate photoreceptors

Katherine Luby-Phelps, Joseph Fogerty, Sheila A. Baker, Gregory J. Pazour, Joseph C. Besharse

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Intraflagellar transport (IFT) of a ∼17S particle containing at least 16 distinct polypeptides is required for the assembly and maintenance of cilia and flagella. Although both genetic and biochemical evidence suggest a role for IFT in vertebrate photoreceptors, the spatial distribution of IFT proteins within photoreceptors remains poorly defined. We have evaluated the distribution of 4 IFT proteins using a combination of immunocytochemistry and rod-specific overexpression of GFP tagged IFT proteins. Endogenous IFT proteins are most highly concentrated within the inner segment, around the basal body, and within the outer segment IFT proteins are localized in discrete particles along the entire length of the axoneme. IFT52-GFP and IFT57-GFP mimicked this pattern in transgenic Xenopus.

Original languageEnglish (US)
Pages (from-to)413-423
Number of pages11
JournalVision Research
Volume48
Issue number3
DOIs
StatePublished - Feb 2008

Keywords

  • Connecting cilium
  • Intraflagellar transport
  • Kinesin
  • Microtubule
  • Photoreceptor
  • Rhodopsin

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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