UAS regulatory sequences drive expression of a full-length nub open reading frame (ORF) that is tagged at the C-terminal end with three copies of the Tag:HA epitope. The ORF is flanked by a pair of incompatible FRT sites (FRT5 and FRT2), which allows for future in vivo exchange of either the promoter or tag sequence.
The T1 and T2 segments of stage 16 embryos expressing nubScer\UAS.ORF.GW.T:Ivir\HA1 under the control of either Scer\GAL4elav-C155 or Scer\GAL4lbe.K show significant increases in the numbers of dividing neuroblasts and dividing neuroblast daughters, as compared to controls.
Expression of nubScer\UAS.ORF.GW.T:Ivir\HA1 under the control of Scer\GAL4Bx-MS1096 results in female flies with severe wing size and patterning defects at 18[o]C.
The triple co-expression of hbUAS.Tag:MYC, KrUAS.Tag:V5 and nubUAS.ORF.GW.Tag:HA under the control of Scer\GAL4da.G32 triggers additional neuroblast and extensive over-proliferation in stage 12 embryos, as compared to controls.
The sextuple co-expression of aseUAS.Tag:MYC, worUAS.Tag:FLAG, SoxNUAS.Tag:V5, KrUAS.Tag:V5, hbUAS.Tag:MYC and nubUAS.ORF.GW.Tag:HA, under the control of Scer\GAL4da.G32 triggers the striking generation of ectopic neuroblasts throughout the ectoderm of stage 12 embryos, with extensive ectopic proliferation, as compared to controls.