Insertion of a P{PZ} element within the untranslated region of the first exon.
Egg chamber maturation proceeds normally in homozygous females.
Egg chambers arrest at stage S14. Nurse cell nuclear chromatin in the oldest egg chambers appears normal. The mature egg chambers have an open chorion.
Nup154tlp2, cup01355 has ovariole phenotype
Nup154tlp2, cup01355 has chromosome & nurse cell phenotype
The ovarioles of cup01355 Nup154tlp2 double homozygous females show a "string of pearls" morphology due to the arrest of egg-chamber development at around stage 4-5. Stage 6-7 egg chambers are only occasionally produced in the double mutant females. In these egg chambers, virtually all nurse cell nuclei have abnormal chromatin configurations that range from tight condensed "spiral" chromosomes (never seen in wild-type nurse cells) to "blob-like" chromosomes (transiently assumed by chromosome arms in wild type prior to their normal dispersal).
cup01355/cup3 is rescued by Scer\GAL4VP16.nanos.UTR/cupUAS.cNa
cup01355/cup3 is partially rescued by Scer\GAL4VP16.nanos.UTR/cupMT.UAS.cNa
cup01355/cupKG00049 females crossed to wild-type males produce viable embryos that develop into phenotypically normal flies.
Mobilisation of the P{PZ} insertion in cup01355 produces many fertile revertants, indicating that the P{PZ} insertion is responsible for the cup01355 phenotype.