DAP3 (Death Associated Protein 3)

Apoptosis, or programmed cell death, occurs during normal cellular differentiation and development of multicellular organisms. Recently, five novel apoptotic genes (named DAP genes for: Death Associated Proteins) have been identified that code for proteins, which display a diverse spectrum of biochemical activities. These include a novel type of calcium/calmodulin-regulated kinase which carries ankyrin repeats and a death domain (DAP-kinase), a nucleotide-binding protein (DAP-3), a small proline-rich cytoplasmic protein (DAP-1), and a novel homolog of the eIF4G translation initiation factor (DAP-5) (1). DAP-3 has an ATP/GTP binding motive (P-loop) and has been isolated from human and mouse, and named as hDAP-3 and mDAP-3 (Death Associated Protein-3), respectively (2-3). Sequence analysis revealed an 82% amino acid identity between human and mouse protein. In situ hybridization and northern blot analysis showed an abundant mRNA expression with a pronounced expression in highly proliferative epithelial compartments. Overexpression of DAP-3 leads to cytochrome c release and induction of cell death. DAP-3 mediated apoptosis was shown to depend on a functional P-loop. mDAP-3 is localized to the mitochondrial matrix and in contrast to cytochrome c, retained its mitochondrial localization during apoptosis induction (3). Positive Control: Jurkat Applications: Suitable for use in Western Blot. Other applications not tested. Recommended Dilution: Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4 degrees C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot Store at -20 degrees C. Aliquots are stable for at least 12 months at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.