Under normal conditions p53E4 adults exhibit an increased cell death in germarium compared to controls. 6 hours after 3 Gy irradiation they do not exhibit an increased cell death rate in germarium, different than controls.
Homozygous flies survive as well as controls up to 50 days, but after this the survival of p53E4 flies is reduced compared to controls. The fertility of p53E4 flies is half that of controls. p53E4 flies are more sensitive to ionising radiation than control flies (as assayed by survival of animals exposed to radiation). Irradiated p53E4 flies show a greater loss of macrochaetae than control flies (indicating greater genomic instability). Wing and eye imaginal discs of p53E4 animals do not show an increase in the number of apoptotic cells following irradiation (in contrast to wild-type discs), but following irradiation, the number of cells undergoing mitosis is significantly decreased in both p53E4 and wild-type discs.
p53E4 is a suppressor of increased cell death | conditional phenotype of Hr3RA.UAS, Scer\GAL4GMR.PU
p53E4 is a suppressor of increased cell death | conditional phenotype of Hr3RB.UAS, Scer\GAL4GMR.PU
p53E4 prevents the IR irradiation-induced increase in apoptosis seen in eye discs expressing Hr46RA.Scer\UAS or Hr46RB.Scer\UAS under the control of Scer\GAL4GMR.PU.