The bride of sevenless and sevenless interaction: Internalization of a transmembrane ligand

Ross L. Cagan, Helmut Krämer, Anne C. Hart, S. Lawrence Zipursky

Research output: Contribution to journalArticle

137 Citations (Scopus)

Abstract

During Drosophila retinal development, the R8 photoreceptor neuron induces a neighboring cell to assume an R7 cell fate through cell contact. This is mediated by the transmembrane protein bride of sevenless (boss) on the surface of the R8 cell, which binds the sevenless tyrosine kinase receptor (sev) on the surface of the R7 precursor cell. The boss protein, which contains a large extracellular domain, seven transmembrane segments, and a C-terminal cytoplasmic domain, has an exceptional structure for a ligand of a receptor tyrosine kinase. Using a panel of antibodies directed to various cytoplasmic and extracellular epitopes, we demonstrate that the entire boss protein from its extreme N-terminus to its extreme C-terminus is internalized by sev-expressing tissue culture cells and by the R7 precursor cell in the developing eye imaginal disc. The receptor-mediated transfer of a transmembrane ligand represents a novel mechanism for protein transfer between developing cells.

Original languageEnglish (US)
Pages (from-to)393-399
Number of pages7
JournalCell
Volume69
Issue number3
DOIs
StatePublished - May 1 1992

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Ligands
Receptor Protein-Tyrosine Kinases
Proteins
Tissue culture
Neurons
Epitopes
Imaginal Discs
Antibodies
Drosophila
Cell Culture Techniques

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology

Cite this

The bride of sevenless and sevenless interaction : Internalization of a transmembrane ligand. / Cagan, Ross L.; Krämer, Helmut; Hart, Anne C.; Zipursky, S. Lawrence.

In: Cell, Vol. 69, No. 3, 01.05.1992, p. 393-399.

Research output: Contribution to journalArticle

Cagan, Ross L. ; Krämer, Helmut ; Hart, Anne C. ; Zipursky, S. Lawrence. / The bride of sevenless and sevenless interaction : Internalization of a transmembrane ligand. In: Cell. 1992 ; Vol. 69, No. 3. pp. 393-399.
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