Neural hyperplasia induced by RNA interference with m4/malpha gene activity.
The E(spl) complex (E(spl)-C) contains three different classes of genes that are downstream of Notch signaling. The bHLH genes mediate the Notch signal by repressing proneural gene activity, for example during the singularization of mechanosensory organ precursor cells (SOPs). Genes of the second class, the E(spl) m4/malpha family, antagonize this process if overexpressed. Here we show that this is based on dominant-negative effects since RNA interference gives neurogenic phenotypes indistinguishable from E(spl)-C mutations. Furthermore, a third member of the m4/malpha gene family, named bbu/tom, behaves differently with respect to RNA expression patterns, its regulation by Notch signaling and loss of function phenotypes.
Nagel
A C
AC
Universität Hohenheim, Institut für Genetik (240), D-70593, Stuttgart, Germany.
Apidianakis
Y
Y
Wech
I
I
Maier
D
D
Delidakis
C
C
Preiss
A
A
D000818:Animals; D001483:Base Sequence; D051792:Basic Helix-Loop-Helix Proteins; D017931:DNA Primers / Q000235:genetics; D004330:Drosophila / Q000196:embryology* / Q000235:genetics*; D029721:Drosophila Proteins; D017344:Genes, Insect; D006965:Hyperplasia; D019476:Insect Proteins / Q000235:genetics* / Q000502:physiology; D008565:Membrane Proteins / Q000235:genetics / Q000502:physiology; D005810:Multigene Family; D009154:Mutation; D009420:Nervous System / Q000196:embryology*; D010641:Phenotype; D012313:RNA / Q000235:genetics; D051880:Receptors, Notch; D012097:Repressor Proteins; D015398:Signal Transduction; D014157:Transcription Factors
D051792:Basic Helix-Loop-Helix Proteins; D017931:DNA Primers; D029721:Drosophila Proteins; D019476:Insect Proteins; D008565:Membrane Proteins; D012313:RNA; D051880:Receptors, Notch; D012097:Repressor Proteins; D014157:Transcription Factors; C121961:E(spl)m4-BFM protein, Drosophila; C121960:E(spl)m7-HLH protein, Drosophila; C497759:N protein, Drosophila