Figure 2. Synthetic Lethality with him-5 Is Independent of Apoptosis but Involves the DDR Checkpoint.
(A) Simplified schematic of the DNA damage checkpoint pathway in the C. elegans germline.
(B) Quantification of total lethality among F1 progeny of ced-3(n717) and him-5(e1490) single mutants and ced-3(n717);him-5(e1490) double mutants. Data are represented as mean ± SEM; n, broods counted. Statistical comparisons between combined lethality of ced-3(n717) and him-5(e1490) single mutants and ced-3(n717);him-5(e1490) double mutants were performed using the two-tailed Mann-Whitney test; 95% CI. p = 0.3508. See also Figure S2A.
(C) Quantification of apoptotic corpses in cep-1(lg12501) and him-5(e1490) single and cep-1(lg12501);him-5(e1490) double mutants under physiological conditions. Data are represented as mean ± SEM; n, germlines counted. Statistical comparisons between wild-type and him-5 single mutants were performed using the two-tailed Mann-Whitney test; 95% CI. p = 0.1704.
(D) Quantification of total lethality among F1 progeny of hus-1(op244), him-5(e1490), and atm-1(gk186) single mutants and hus-1(op244);him-5(e1490) and atm-1(gk186);him-5(e1490) double mutants. Data are represented as mean ± SEM; n, broods counted. Statistical comparisons between genotypes were performed using the two-tailed Mann-Whitney test; 95% CI. him-5(e1490) versus hus-1(op244); him-5(e1490), ***p < 0.0001;him-5(1490) versus atm-1(gk186);him-5(e1490), *p = 0.0159.
(E) Representative confocal image of DAPI-stained diakinesis chromosomes of young adult (Day 1) hus-1(op244);him-5(e1490) mutants. Scale bar represents 5 µm. See also Figure S2B.
(F) Representative confocal image of DAPI-stained diakinesis chromsomes of young adult (Day 1) atm-1(gk186);him-5(e1490) mutants. Scale bar represents 5 µm. See also Figure S2C.