title: Prostaglandins regulate nuclear localization of Fascin and its function in nucleolar architecture.
abstract: Fascin, a highly conserved actin-bundling protein, localizes and functions at new cellular sites in both Drosophila and multiple mammalian cell types. During Drosophila follicle development, in addition to being cytoplasmic, Fascin is in the nuclei of the germline-derived nurse cells during stages 10B-12 (S10B-12) and at the nuclear periphery during stage 13 (S13). This localization is specific to Fascin, as other actin-binding proteins, Villin and Profilin, do not exhibit the same subcellular distribution. In addition, localization of fascin1 to the nucleus and nuclear periphery is observed in multiple mammalian cell types. Thus the regulation and function of Fascin at these new cellular locations is likely to be highly conserved. In Drosophila, loss of prostaglandin signaling causes a global reduction in nuclear Fascin and a failure to relocalize to the nuclear periphery. Alterations in nuclear Fascin levels result in defects in nucleolar morphology in both Drosophila follicles and cultured mammalian cells, suggesting that nuclear Fascin plays an important role in nucleolar architecture. Given the numerous roles of Fascin in development and disease, including cancer, our novel finding that Fascin has functions within the nucleus sheds new light on the potential roles of Fascin in these contexts.
authors: Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242.
authors: Christopher M
authors: CM
authors: Groen
authors: Randall Division of Cell and Molecular Biophysics, King's College London, London SE1 1UL, United Kingdom.
authors: Asier
authors: A
authors: Jayo
authors: Randall Division of Cell and Molecular Biophysics, King's College London, London SE1 1UL, United Kingdom.
authors: Maddy
authors: M
authors: Parsons
authors: Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, IA 52242 tina-tootle@uiowa.edu.
authors: Tina L
authors: TL
authors: Tootle
mesh_terms: D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism* / Q000502:physiology; D002466:Cell Nucleolus / Q000648:ultrastructure*; D004330:Drosophila; D005260:Female; D006801:Humans; D008840:Microfilament Proteins / Q000378:metabolism* / Q000502:physiology; D009687:Nuclear Proteins / Q000378:metabolism*; D006080:Ovarian Follicle / Q000378:metabolism / Q000502:physiology* / Q000648:ultrastructure; D011453:Prostaglandins / Q000502:physiology*; D021381:Protein Transport; D015398:Signal Transduction
chemical_list: D002352:Carrier Proteins; D008840:Microfilament Proteins; D009687:Nuclear Proteins; D011453:Prostaglandins; C020324:fascin