title: The nucleoporin Nup205/NPP-3 is lost near centrosomes at mitotic onset and can modulate the timing of this process in Caenorhabditis elegans embryos.
abstract: Regulation of mitosis in time and space is critical for proper cell division. We conducted an RNA interference-based modifier screen to identify novel regulators of mitosis in Caenorhabditis elegans embryos. Of particular interest, this screen revealed that the Nup205 nucleoporin NPP-3 can negatively modulate the timing of mitotic onset. Furthermore, we discovered that NPP-3 and nucleoporins that are associated with it are lost from the nuclear envelope (NE) in the vicinity of centrosomes at the onset of mitosis. We demonstrate that centrosomes are both necessary and sufficient for NPP-3 local loss, which also requires the activity of the Aurora-A kinase AIR-1. Our findings taken together support a model in which centrosomes and AIR-1 promote timely onset of mitosis by locally removing NPP-3 and associated nucleoporins from the NE.
authors: Swiss Institute for Experimental Cancer Research, School of Life Sciences, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland.
authors: Virginie
authors: V
authors: Hachet
authors: Coralie
authors: C
authors: Busso
authors: Mika
authors: M
authors: Toya
authors: Asako
authors: A
authors: Sugimoto
authors: Peter
authors: P
authors: Askjaer
authors: Pierre
authors: P
authors: Gönczy
mesh_terms: D000818:Animals; D064096:Aurora Kinase A; D017173:Caenorhabditis elegans / Q000166:cytology* / Q000378:metabolism / Q000502:physiology; D029742:Caenorhabditis elegans Proteins / Q000235:genetics / Q000378:metabolism*; D018385:Centrosome / Q000378:metabolism*; D004625:Embryo, Nonmammalian / Q000166:cytology* / Q000378:metabolism / Q000502:physiology; D005260:Female; D055785:Gene Knockdown Techniques; D008297:Male; D008938:Mitosis; D009685:Nuclear Envelope / Q000378:metabolism; D028861:Nuclear Pore Complex Proteins / Q000235:genetics / Q000378:metabolism*; D010539:Permeability; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism; D021381:Protein Transport; D034622:RNA Interference; D059008:Time-Lapse Imaging
chemical_list: D029742:Caenorhabditis elegans Proteins; C577012:NPP-3 protein, C elegans; D028861:Nuclear Pore Complex Proteins; D064096:Aurora Kinase A; D017346:Protein Serine-Threonine Kinases; C576939:air-1 protein, C elegans