The JAK/STAT signaling pathway is required for the initial choice of sexual identity in Drosophila melanogaster

Timothy M. Jinks, Alexandros D. Polydorides, Gretchen Calhoun, Paul Schedl

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

The choice of sexual identity in Drosophila is determined by a system that measures the X chromosome to autosome ratio (X/A). This system depends upon unequal expression of X-linked numerator genes in 1X and 2X nuclei. The numerators activate a special Sxl promoter, Sxl-Pe, in 2X/2A nuclei, but not 1X/2A nuclei. By multimerizing a conserved Sxl-Pe sequence block, we generated a gain-of-function promoter, Sxl-Pe(GOF), that is inappropriately active in 1X/2A nuclei. GOF activity requires the X-linked unpaired (upd) gene, which encodes a ligand for the Drosophila JAK/STAT signaling pathway. upd also functions as a numerator element in regulating wild-type Sxl-Pe reporters. We demonstrate that the JAK kinase, Hopscotch, and the STAT DNA-binding protein, Marelle, are also required for Sxl-Pe activation.

Original languageEnglish (US)
Pages (from-to)581-587
Number of pages7
JournalMolecular Cell
Volume5
Issue number3
DOIs
StatePublished - Jan 1 2000

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cell Biology

Fingerprint Dive into the research topics of 'The JAK/STAT signaling pathway is required for the initial choice of sexual identity in Drosophila melanogaster'. Together they form a unique fingerprint.

  • Cite this