Conserved and divergent elements in Torso RTK activation in Drosophila development

摘要: The repeated use of signalling pathways is a common phenomenon but little known about how they become co-opted in different contexts. Here we examined this issue by analysing the activation Drosophila Torso receptor embryogenesis and pupariation. While its putative ligand differs each case, show that Torso-like, not other proteins required for embryogenesis, also In addition, demonstrate distinct enhancers control torso-like expression both scenarios. We conclude linked to duplication differential ligand-encoding gene, acquisition promoter recruitment independently embryogenesis. A combination these mechanisms likely allow single