2385bp of robo1 upstream flanking sequence drives expression of robo1 lacking the Ig5 domain (amino acid residues 441-534 are missing). 2192bp of robo1 downstream flanking sequence is also present. The protein produced contains the endogenous robo1 signal peptide and is tagged with 4 copies of Tag:HA directly upstream of the first Ig domain present (Ig1).
Expression of robo1ΔIg5.T:Ivir\HA1 in the wild-type background has no discernible effect on the structure and morphology of the embryonic ventral nerve cord, not even when two copies of the transgene are present.
robo1ΔIg5.Tag:HA is a non-suppressor of abnormal neuroanatomy | embryonic stage phenotype of Scer\GAL4elav.PLu, comm10xUAS.cRa
robo1ΔIg5.Tag:HA is a non-suppressor of larval ventral nerve cord | embryonic stage phenotype of Scer\GAL4elav.PLu, comm10xUAS.cRa
The midline collapse phenotype observed in the ventral nerve cord of embryos expressing comm10xScer\UAS.cRa under the control of Scer\GAL4elav.PLu is not affected by combination with robo1ΔIg5.T:Ivir\HA1.
robo1ΔIg5.Tag:HA rescues robo11
Expression of robo1ΔIg5.T:Ivir\HA1 in robo11 mutant background fully rescues the defects in midline repulsion characteristic for robo11 mutants and restores the normal appearance of the axon scaffold in the embryonic ventral nerve cord.