RRC ID 4174
Author Luke-Glaser S, Pintard L, Tyers M, Peter M.
Title The AAA-ATPase FIGL-1 controls mitotic progression, and its levels are regulated by the CUL-3MEL-26 E3 ligase in the C. elegans germ line.
Journal J. Cell. Sci.
Abstract Members of the AAA-ATPase (ATPases associated with diverse cellular activities) family use the energy from ATP hydrolysis to disrupt protein complexes involved in many cellular processes. Here, we report that FIGL-1 (Fidgetin-like 1), the single Caenorhabditis elegans homolog of mammalian fidgetin and fidgetin-like 1 AAA-ATPases, controls progression through mitosis in the germ line and the early embryo. Loss of figl-1 function leads to the accumulation of mitotic nuclei in the proliferative zone of the germ line, resulting in sterility owing to depletion of germ cells. Like the AAA-ATPase MEI-1 (also known as katanin), FIGL-1 interacts with microtubules and with MEL-26, a specificity factor of CUL-3-based E3 ligases involved in targeting proteins for ubiquitin-dependent degradation by the 26S proteasome. In the germ line, FIGL-1 is enriched in nuclei of mitotic cells, but it disappears at the transition into meiosis. Conversely, MEL-26 expression is low in nuclei of the mitotic zone and induced during meiosis. FIGL-1 accumulates in the germ line and spreads to the meiotic zone after inactivation of mel-26 or cul-3 in vivo. We conclude that degradation of FIGL-1 by the CUL-3MEL-26 E3 ligase spatially restricts FIGL-1 function to mitotic cells, where it is required for correct progression through mitosis.
Volume 120(Pt 18)
Pages 3179-87
Published 2007-9-15
DOI 10.1242/jcs.015883
PII 120/18/3179
PMID 17878235
MeSH Adenosine Triphosphatases / genetics Adenosine Triphosphatases / metabolism* Animals Caenorhabditis elegans / cytology Caenorhabditis elegans / genetics Caenorhabditis elegans / metabolism* Caenorhabditis elegans Proteins / genetics Caenorhabditis elegans Proteins / metabolism* Cell Nucleus / genetics Cell Nucleus / metabolism Cullin Proteins / genetics Cullin Proteins / metabolism* Germ Cells / cytology Germ Cells / metabolism* Infertility / genetics Infertility / metabolism Katanin Meiosis / physiology Microtubules / genetics Microtubules / metabolism Mitosis / physiology* Proteasome Endopeptidase Complex / genetics Proteasome Endopeptidase Complex / metabolism Ubiquitin-Protein Ligases / genetics Ubiquitin-Protein Ligases / metabolism*
IF 4.517
Times Cited 16
C.elegans tm808