Suppression of distinct ovo phenotypes in the Drosophila female germline by maleless- and Sex-lethal.
Dev Genet
; 23(4): 335-46, 1998.
Article
em En
| MEDLINE
| ID: mdl-9883585
ABSTRACT
Mutations in ovo result in several different phenotypes, which we show are due to the regulation of distinct developmental pathways. Two X (female) germ cells require ovo+ activity for viability, but 1X (male) germ cells do not. In our study, we observed suppression of the ovo germline-lethality phenotype in loss-of-function maleless (mle) females indicating that ovo+ and mle+ have opposing effects in female germ cells; or that they are hierarchically related. Gain-of-function Sex-lethal (Sxl) alleles and male specific lethal-2 alleles did not suppress the ovo germline death phenotype. Many of the surviving germ cells in females mutant for both ovo and mle showed ovarian tumors. In contrast to the germline viability phenotype, we did observe suppression of the tumor phenotype in females heterozygous for gain-of-function alleles of Sxl. Further, females mutant for some hypomorphic ovo alleles were rendered fertile by Sxl gain-of-function alleles. Thus, ovo+ is required for at least two distinct functions, one involving mle+, and one mediated by Sxl+ gene products. The existence of ovo+ functions independent of mle+ and Sxl+ is likely.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oogênese
/
Fatores de Transcrição
/
Proteínas Cromossômicas não Histona
/
Proteínas de Ligação a RNA
/
DNA Helicases
/
Regulação da Expressão Gênica no Desenvolvimento
/
Processos de Determinação Sexual
/
RNA Helicases
/
Proteínas de Drosophila
/
Proteínas de Ligação a DNA
Limite:
Animals
Idioma:
En
Revista:
Dev Genet
Ano de publicação:
1998
Tipo de documento:
Article