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MAPK signaling couples SCF-mediated degradation of translational regulators to oocyte meiotic progression
- Source :
- Proceedings of the National Academy of Sciences. 115
- Publication Year :
- 2018
- Publisher :
- Proceedings of the National Academy of Sciences, 2018.
-
Abstract
- RNA-binding proteins (RBPs) are important regulators of gene expression programs, especially during gametogenesis. How the abundance of particular RBPs is restricted to defined stages of meiosis remains largely elusive. Here, we report a molecular pathway that subjects two nonrelated but broadly evolutionarily conserved translational regulators (CPB-3/CPEB and GLD-1/STAR) to proteosomal degradation in Caenorhabditis elegans germ cells at the transition from pachytene to diplotene of meiotic prophase. Both RBPs are recognized by the same ubiquitin ligase complex, containing the molecular scaffold Cullin-1 and the tumor suppressor SEL-10/FBXW7 as its substrate recognition subunit. Destabilization of either RBP through this Skp, Cullin, F-box-containing complex (SCF) ubiquitin ligase appears to loosen its negative control over established target mRNAs, and presumably depends on a prior phosphorylation of CPB-3 and GLD-1 by MAPK (MPK-1), whose activity increases in mid- to late pachytene to promote meiotic progression and oocyte differentiation. Thus, we propose that the orchestrated degradation of RBPs via MAPK-signaling cascades during germ cell development may act to synchronize meiotic with sexual differentiation gene expression changes.
- Subjects :
- 0301 basic medicine
endocrine system
MAP Kinase Signaling System
Ubiquitin-Protein Ligases
Cell Cycle Proteins
RNA-binding protein
F-box protein
CPEB
Animals, Genetically Modified
03 medical and health sciences
Oogenesis
medicine
Animals
Phosphorylation
Caenorhabditis elegans
Caenorhabditis elegans Proteins
Mitogen-Activated Protein Kinase 1
Multidisciplinary
biology
Ubiquitination
RNA-Binding Proteins
Ubiquitin ligase
Cell biology
Meiosis
030104 developmental biology
medicine.anatomical_structure
PNAS Plus
Ubiquitin ligase complex
Oocytes
biology.protein
Oocyte differentiation
Protein Processing, Post-Translational
Germ cell
Cullin
Subjects
Details
- ISSN :
- 10916490 and 00278424
- Volume :
- 115
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences
- Accession number :
- edsair.doi.dedup.....f7090e92b614ffddf80ff513e4d8e5e0