Buffy, a Drosophila Bcl-2 protein, has anti-apoptotic and cell cycle inhibitory functions.
EMBO J
; 22(14): 3568-79, 2003 Jul 15.
Article
em En
| MEDLINE
| ID: mdl-12853472
ABSTRACT
Bcl-2 family proteins are key regulators of apoptosis. Both pro-apoptotic and anti-apoptotic members of this family are found in mammalian cells, but only the pro-apoptotic protein Debcl has been characterized in Drosophila Here we report that Buffy, the second Drosophila Bcl-2-like protein, is a pro-survival protein. Ablation of Buffy by RNA interference leads to ectopic apoptosis, whereas overexpression of buffy results in the inhibition of developmental programmed cell death and gamma irradiation-induced apoptosis. Buffy interacts genetically and physically with Debcl to suppress Debcl-induced cell death. Genetic interactions suggest that Buffy acts downstream of Rpr, Grim and Hid, and upstream of the apical caspase Dronc. Furthermore, overexpression of buffy inhibits ectopic cell death in diap1 (th(5)) mutants. Taken together these data suggest that Buffy can act downstream of Rpr, Grim and Hid to block caspase-dependent cell death. Overexpression of Buffy in the embryo results in inhibition of the cell cycle, consistent with a G(1)/early-S phase arrest. Our data suggest that Buffy is functionally similar to the mammalian pro-survival Bcl-2 family of proteins.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Ciclo Celular
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Apoptose
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Proteínas Proto-Oncogênicas c-bcl-2
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Proteínas de Drosophila
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Drosophila
Limite:
Animals
Idioma:
En
Ano de publicação:
2003
Tipo de documento:
Article