title: The Small GTPase Rsg1 is important for the cytoplasmic localization and axonemal dynamics of intraflagellar transport proteins.
abstract: BACKGROUND
  Cilia are small, microtubule-based protrusions important for development and homeostasis. We recently demonstrated that the planar cell polarity effector protein Fuz is a critical regulator of axonemal intraflagellar transport dynamics and localization. Here, we report our findings on the role of the small GTPase Rsg1, a known binding partner of Fuz, and its role in the dynamics and cytoplasmic localization of intraflagellar transport proteins.
  
  
  RESULTS
  We find that Rsg1 loss of function leads to impaired axonemal IFT dynamics in multiciliated cells. We further show that Rsg1 is required for appropriate cytoplasmic localization of the retrograde IFT-A protein IFT43. Finally, we show that Rsg1 governs the apical localization of basal bodies, the anchoring structures of cilia.
  
  
  CONCLUSIONS
  Our data suggest that Rsg1 is a regulator of multiple aspects of ciliogenesis, including apical trafficking of basal bodies and the localization and dynamics intraflagellar transport proteins.
authors.affiliation: Section of Molecular Cell and Developmental Biology and the Institute for Cellular and Molecular Biology, The University of Texas at Austin, Patterson Labs, 2401 Speedway, Austin, TX 78712, USA.
authors.forename: Eric R
authors.initials: ER
authors.lastname: Brooks
authors.affiliation: Section of Molecular Cell and Developmental Biology and the Institute for Cellular and Molecular Biology, The University of Texas at Austin, Patterson Labs, 2401 Speedway, Austin, TX 78712, USA ; The Howard Hughes Medical Institute, Chevy Chase, USA.
authors.forename: John B
authors.initials: JB
authors.lastname: Wallingford
keywords: Cilia; Fuz; IFT; PCP; Rsg1