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Resources » Paper

Bae YK et al. (2009) Curr Biol "The CIL-1 PI 5-phosphatase localizes TRP Polycystins to cilia and activates sperm in C. elegans."

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  • Comments on Bae YK et al. (2009) Curr Biol "The CIL-1 PI 5-phosphatase localizes TRP Polycystins to cilia and activates sperm in C. elegans." (0)

  • Overview

    PMID:
    19781942
    DOI:
    10.1016/j.cub.2009.08.045
    Status:
    Publication type:
    Journal_article
    WormBase ID:
    WBPaper00035231

    Bae YK, Kim E, L'Hernault SW, & Barr MM (2009). The CIL-1 PI 5-phosphatase localizes TRP Polycystins to cilia and activates sperm in C. elegans. Curr Biol, 19, 1599-607. doi:10.1016/j.cub.2009.08.045

    BACKGROUND: C. elegans male sexual behaviors include chemotaxis and response to hermaphrodites, backing, turning, vulva location, spicule insertion, and sperm transfer, culminating in cross-fertilization of hermaphrodite oocytes with male sperm. The LOV-1 and PKD-2 transient receptor potential polycystin (TRPP) complex localizes to ciliated endings of C. elegans male-specific sensory neurons and mediates several aspects of male mating behavior. TRPP complex ciliary localization and sensory function are evolutionarily conserved. A genetic screen for C. elegans mutants with PKD-2 ciliary localization (Cil) defects led to the isolation of a mutation in the cil-1 gene. RESULTS: Here, we report that a phosphoinositide (PI) 5-phosphatase, CIL-1, regulates TRPP complex ciliary receptor localization and sperm activation. cil-1 does not regulate the localization of other ciliary proteins, including intraflagellar transport (IFT) components, sensory receptors, or other TRP channels in different cell types. Rather, cil-1 specifically controls TRPP complex trafficking in male-specific sensory neurons and does so in a cell-autonomous fashion. In these cells, cil-1 is required for normal PI(3)P distribution, indicating that a balance between PI(3,5)P2 and PI(3)P is important for TRPP localization. cil-1 mutants are infertile because of sperm activation and motility defects. In sperm, the CIL-1 5-phosphatase and a wortmannin-sensitive PI 3-kinase act antagonistically to regulate the conversion of sessile spermatids into motile spermatozoa, implicating PI(3,4,5)P3 signaling in nematode sperm activation. CONCLUSION: Our studies identify the CIL-1 5-phosphatase as a key regulator of PI metabolism in cell types that are important in several aspects of male reproductive biology.


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