Cytochrome c-d regulates developmental apoptosis in the Drosophila retina.

Abstract:

:The role of cytochrome c (Cyt c) in caspase activation has largely been established from mammalian cell-culture studies, but much remains to be learned about its physiological relevance in situ. The role of Cyt c in invertebrates has been subject to considerable controversy. The Drosophila genome contains distinct cyt c genes: cyt c-p and cyt c-d. Loss of cyt c-p function causes embryonic lethality owing to a requirement of the gene for mitochondrial respiration. By contrast, cyt c-d mutants are viable but male sterile. Here, we show that cyt c-d regulates developmental apoptosis in the pupal eye. cyt c-d mutant retinas show a profound delay in the apoptosis of superfluous interommatidial cells and perimeter ommatidial cells. Furthermore, there is no apoptosis in mutant retinal tissues for the Drosophila homologues of apoptotic protease-activating factor 1 (Ark) and caspase 9 (Dronc). In addition, we found that cyt c-d--as with ark and dronc-regulates scutellar bristle number, which is known to depend on caspase activity. Collectively, our results indicate a role of Cyt c in caspase regulation of Drosophila somatic cells.

journal_name

EMBO Rep

journal_title

EMBO reports

authors

Mendes CS,Arama E,Brown S,Scherr H,Srivastava M,Bergmann A,Steller H,Mollereau B

doi

10.1038/sj.embor.7400773

subject

Has Abstract

pub_date

2006-09-01 00:00:00

pages

933-9

issue

9

eissn

1469-221X

issn

1469-3178

pii

7400773

journal_volume

7

pub_type

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