The PBac{PB}orb2c06090 insertion maps within both orb2 and CG43783 (the genes share some exons at the 5' end, including some coding sequence).
Fertility of homozygous males is substantially impaired. Fertile orb2c06090/Df(3L)ED4416 males are occasionally recovered.
orb2c06090 mutants exhibit a reduction in lifespan.
25% of orb2c06090 embryos show RP2 neuron specification defects. In approximately 70% of cases the RP2 neurons are duplicated and two Eve-positive cell are seen per hemisegment. However, hemisegments are also seen that lack Eve-positive cells. Abnormalities in asymmetric division are also observed in the P2 to EPC and P15 to DA1 lineages.
The orb2c06090 mutant takes longer than wild type to return to a standing position following vortexing and fewer flies climb the vial following knockdown. Recovery from heat shock also occurs more slowly than in controls.
The rough eye phenotype observed in Fmr1sev.PW flies is suppressed in a orb2c06090/+ background.
orb2[+]/orb2c06090 is a suppressor of eye phenotype of Fmr1sev.PW
Precise excision of the transposon rescues the lethality seen in orb2c06090.
Excision of the insertion reverts the male sterility phenotype.