centriole & spermatocyte (with Df(2R)Pcl7B)
Nebenkern (with pAbpk10109)
nucleus (with pAbpk10109)
spindle & spermatocyte (with Df(2R)Pcl7B)
pAbpk10109/pAbpEY11561 heterozygotes exhibit abnormalities in spermatogenesis. these include absence of meiotic cytokinesis (in 5% of cases), resulting in formation of polyploid spermatids and defects in spermatid elongation (in approximately 100% of cases). Nuclei fail to elongate, keep a round shape and are dispersed along the cyst instead of grouping at the head of the cyst. Nebenkern DAPi staining (for DNA) appears to be non-uniform in these mutants, reflecting the effect of the trans-heterozygous mutants on mitochondrial DNA organization in at least 60% of cases. There appears to be no difference between the trans-heterozygous mutant and controls, showing that mutant mitochondrial membranes keep their integrity, but in the mutant, the onion-stage Nebenkern looks larger than in controls, and its morphology differs from a perfect sphere. Examination with an electron microscope reveals abnormal mitochondrial membranes at onion-stage spermatids in the trans-heterozygous mutant. These mitochondria also exhibit defective attachment to axonemes in the elongating spermatids.
pAbpEY11561/Df(2R)Pcl7B spermatocytes show defects in meiosis; some spermatocytes have short spindles, and premature separation of centrioles is seen in some cases.
Over-expression of pAbpEY11561 reduces dendrite branching, and alters dendritic morphology in larval class IV sensory neurons (induced under the control of Scer\GAL4Act.PU). Total dendrite length is not significantly reduced in these neurons.
pAbpEY11561/pAbpEY11561 is an enhancer of neoplasia | adult stage | male phenotype of tut4
pAbpEY11561/pAbpEY11561 is an enhancer of testis phenotype of tut4
pAbpEY11561/pAbpEY11561 is an enhancer of spermatogonium phenotype of tut4
The severity of the tut4 mutant tumorigenic phenotype is also strongly enhanced by combination with pAbpEY11561 homozygosity, but if combined with just one copy of tut4, this genetic perturbation does not cause a significant tumor phenotype.