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- W2022205825 abstract "The dunce gene of Drosophila melanogaster encodes a cAMP-specific phosphodiesterase (form II). Mutant dunce flies have elevated levels of cAMP and exhibit a number of defects including learning deficiencies and female sterility. Two partial suppressors of the female sterility phenotype have been selected in an X chromosome containing a dunce null mutation. Both suppressors are associated with reduced AC2 activity. Complementation analyses suggest that both are alleles of the learning mutant rutabaga. Females homozygous for dunce null mutations that abolish PDE activity do not deposit eggs. The suppressors exhibit differential effects on egg deposition and production of progeny; double-mutant females deposit many eggs that fail to hatch, but some develop to adults. These adult progeny exhibit morphological defects that are confined mostly to the second and third thoracic segments or to the first five abdominal segments. These observations demonstrate that the dunce gene is required in adult females for egg laying and that the dunce gene provides an essential maternal function required for normal development of the zygote. Clonal analysis, employing the dominant female-sterile mutation ovoD1, demonstrates that the former requirement for PDE activity resides in somatic cells and that the latter requirement resides in germ line cells. Female germ line cells homozygous for a dunce null mutation produce oocytes that fail to develop. Thus, homozygous dunce null-mutant zygotes develop to adults solely because of the enzyme or mRNA present in the oocytes of heterozygous mothers. Mutant alleles of rutabaga act in the germ line cells to partially suppress the developmental defects caused by dunce mutations. Thus the rutabaga gene, as well as the dunce gene, functions in both somatic and germ line cells." @default.
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- W2022205825 date "1987-06-01" @default.
- W2022205825 modified "2023-10-16" @default.
- W2022205825 title "Two Drosophila learning mutants, dunce and rutabaga, provide evidence of a maternal role for cAMP on embryogenesis" @default.
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- W2022205825 doi "https://doi.org/10.1016/0012-1606(87)90180-1" @default.
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