The Damage-Responsive Drosophila Gene sickle Encodes a Novel IAP Binding Protein Similar to but Distinct from reaper, grim, and hid
| Autor: | Anna Christich, Saila Kauppila, John M. Abrams, Naoko Sogame, Su Inn Ho, Po Chen |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Programmed cell death
Molecular Sequence Data Apoptosis Inhibitor of apoptosis General Biochemistry Genetics and Molecular Biology 03 medical and health sciences 0302 clinical medicine Animals Drosophila Proteins Amino Acid Sequence Gene Caspase 030304 developmental biology 0303 health sciences biology Sequence Homology Amino Acid Agricultural and Biological Sciences(all) Reaper Biochemistry Genetics and Molecular Biology(all) Binding protein fungi Neuropeptides Molecular biology Cell biology N-terminus body regions biology.protein Insect Proteins Drosophila General Agricultural and Biological Sciences Peptides 030217 neurology & neurosurgery |
| Zdroj: | Current Biology. 12(2):137-140 |
| ISSN: | 0960-9822 |
| DOI: | 10.1016/s0960-9822(01)00658-3 |
| Popis: | In flies and mammals, critical regulators of cell death function by antagonizing Inhibitor of Apoptosis Proteins (IAPs), which themselves directly block caspase action [1]. The three currently known IAP antagonists in Drosophila map to the H99 genomic interval required for all programmed cell death [2]. Here we describe a fourth member of this genetic group, sickle ( skl ), which maps just outside of the H99 deletion. At its N terminus, Skl shares residues in common with other IAP antagonists in flies (Rpr, Grim, and Hid) [3–5] and in mammals (Smac/DIABLO and Omi/Htra2) [6–10]. Like other activators of apoptosis mapping in the Reaper region, full-length skl induced apoptosis when overexpressed, and the N terminus of this protein specifically bound to the BIR2 domain of DIAP1. However, unlike the N termini of Grim, Hid [11, 12], and Rpr, the N terminus of Skl did not induce apoptosis. skl transcripts accumulate in cells that are fated to die in some but not all regions of the embryo. Genotoxic stimuli induced skl expression, but skl was not responsive to all signals that trigger premature apoptosis. skl is potentially a fourth IAP antagonist in the "Reaper region" and a new candidate transducer of apoptotic damage signaling in Drosophila . |
| Databáze: | OpenAIRE |
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