The plexin PLX-2 and the ephrin EFN-4 have distinct roles in MAB-20/semaphorin 2A signaling in Caenorhabditis elegans morphogenesis

Fumi Nakao, Martin L. Hudson, Motoshi Suzuki, Zachary Peckler, Rie Kurokawa, Zhicen Liu, Keiko Gengyo-Ando, Akira Nukazuka, Takashi Fujii, Fumikazu Suto, Yukimasa Shibata, Go Shioi, Hajime Fujisawa, Shohei Mitani, Andrew D. Chisholm, Shin Takagi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Semaphorins are extracellular proteins that regulate axon guidance and morphogenesis by interacting with a variety of cell surface receptors. Most semaphorins interact with plexin-containing receptor complexes, although some interact with non-plexin receptors. Class 2 semaphorins are secreted molecules that control axon guidance and epidermal morphogenesis in Drosophila and Caenorhabditis elegans. We show that the C. elegans class 2 semaphorin MAB-20 binds the plexin PLX-2. plx-2 mutations enhance the phenotypes of hypomorphic mab-20 alleles but not those of mab-20 null alleles, indicating that plx-2 and mab-20 act in a common pathway. Both mab-20 and plx-2 mutations affect epidermal morphogenesis during embryonic and in postembryonic development. In both contexts, plx-2 null mutant phenotypes are much less severe than mab-20 null phenotypes, indicating that PLX-2 is not essential for MAB-20 signaling. Mutations in the ephrin efn-4 do not synergize with mab-20, indicating that EFN-4 may act in MAB-20 signaling. EFN-4 and PLX-2 are coexpressed in the late embryonic epidermis where they play redundant roles in MAB-20-dependent cell sorting.

Original languageEnglish
Pages (from-to)1591-1607
Number of pages17
JournalGenetics
Volume176
Issue number3
DOIs
Publication statusPublished - 2007 Jul

ASJC Scopus subject areas

  • Genetics

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