Document Type


Publication Date


Publication Title

Proceedings of the National Academy of Sciences of the United States of America


Geisel School of Medicine


The Caenorhabditis elegans F-box protein SEL-10 and its human homolog have been proposed to regulate LIN-12 Notch signaling by targeting for ubiquitin-mediated proteasomal degradation LIN-12 Notch proteins and SEL-12 PS1 presenilins, the latter of which have been implicated in Alzheimer's disease. We found that sel-10 is the same gene as egl-41, which previously had been defined by gain-of-function mutations that semidominantly cause masculinization of the hermaphrodite soma. Our results demonstrate that mutations causing loss-of-function of sel-10 also have masculinizing activity, indicating that sel-10 functions to promote female development. Genetically, sel-10 acts upstream of the genes fem-1, fem-2, and fem-3 and downstream of her-1 and probably tra-2. When expressed in mammalian cells, SEL-10 protein coimmunoprecipitates with FEM-1, FEM-2, and FEM-3, which are required for masculinization, and FEM-1 and FEM-3 are targeted by SEL-10 for proteasomal degradation. We propose that SEL-10-mediated proteolysis of FEM-1 and FEM-3 is required for normal hermaphrodite development.



Original Citation

Jäger S, Schwartz HT, Horvitz HR, Conradt B. The Caenorhabditis elegans F-box protein SEL-10 promotes female development and may target FEM-1 and FEM-3 for degradation by the proteasome. Proc Natl Acad Sci U S A. 2004 Aug 24;101(34):12549-54. doi: 10.1073/pnas.0405087101. Epub 2004 Aug 11. PMID: 15306688; PMCID: PMC515095.