In a background of apoptosis-deficient cells in imaginal discs, X-irradiation results in tumorigenic phenotypes, including overgrowth of targeted cells within the disc and delamination of the epithelium (see FBhh0001040). The additional effects of reduced function of genes that contribute to cell-cycle checkpoints have been assessed. RNAi-mediated reduction of grp (orthologous to human CHEK1) or mei-41 (orthologous to human ATR) enhances the tumorigenic phenotypes; these two genes are involved in DNA-damage-induced cell cycle arrest in G2.
[updated Jun. 2019 by FlyBase; FBrf0222196]
High-scoring ortholog of human CHEK1 (1 Drosophila to 1 human). Dmel\grp shares 44% identity and 59% similarity with the human gene.
High-scoring ortholog of human ATR (1 Drosophila to 1 human). Dmel\mei-41 shares 26% identity and 44% similarity with the human gene.