Amino acid replacement: W111term.
G9416675A
W111term | wun2-PA; W7term | wun2-PB
W111term
G to A nucleotide change at the second or third position of the wild type Trp codon leads to a nonsense mutation (exact site of mutation unspecified). The mutation was annotated at the second base of the codon.
ovary & germ cell & adult | non-rescuable maternal effect (with Df(2R)w45-19g)
pole cell & gonad & embryo | non-rescuable maternal effect (with Df(2R)w45-19g)
Embryos derived from wun2N14/Df(2R)w45-19g females and wild type males have approximately 2 germ cells in stage 15/16 embryos (compared to approximately 21 in wild type).
Embryos derived from females carrying wun2N14 germline clones and wild type males contain only one germ cell on average in stage 15/16 embryos (compared to approximately 20 in wild type).
Embryos from wun2N14/Df(2R)w45-19g mothers form normal numbers of pole cells which migrate normally up to stage 10. However, by stage 11, the numbers of poles cells are dramatically reduced. Any remaining pole cells remain associated with the surface of the midgut, and in subsequent development, few or no pole cells are incorporated into the gonads. These animals develop into morphologically normal animals. However, 80% of the resulting adult females are agametic.
DNaseIIlo, wun2N14 has decreased cell number | maternal effect | embryonic stage phenotype
Df(2R)w45-19g/wun2N14 has primordial germ cell | non-rescuable maternal effect | embryonic stage phenotype, suppressible | partially by Df(2R)w45-19g/wunCE
DNaseIIlo, wun2N14 has primordial germ cell | maternal effect | embryonic stage | decreased number phenotype
The pole cell death phenotype of embryos from wun2N14/Df(2R)w45-19g mothers is partially suppressed by zygotic wunCE/Df(2R)w45-19g, although proper migration of the pole cells is not rescued in these embryos (Note wunCE/Df(2R)w45-19g vs wunCE/+ embryos not indpendently scoreable, but in a 1:1 population of each, 50% had a less severe cell death phenotype than wun+ embryos from wun2N14/Df(2R)w45-19g mothers. These were assumed to be wunCE/Df(2R)w45-19g rather than wunCE/+).
Df(2R)w45-19g/wun2N14 is partially rescued by Scer\GAL4VP16.nanos.UTR/wun2EP2650
Isolated in an EMS screen to identify maternal mutations causing defects in pole cell development.