Fig. 1

(A-C) Schematic of CRISPR/Cas9 knock-out of taz. The target site (shown in blue) is located in exon 1 of taz, and the PAM region is shown in red (A). Two mutant alleles with small deletions, taz ^Δ10 and taz ^Δ1, were obtained (B), both of which result in frame-shifts of the taz open reading frame and truncated proteins (C). aa, amino acid; TEAD BD, Tead transcription factor binding domain (light blue); WW, dual tryptophan motif (green); TAD, transactivation domain (purple); PDZ domain (blue). (D) Western blot analysis shows Taz protein in wild type but not in taz^{Δ10/ Δ10} mutant embryos. β-Tubulin is used as a loading control. (E, F) Similar to wild type embryos (E), taz^Δ10/Δ10 embryos are largely normal at 4.5 dpf, except for a smaller inflated swim bladder and mild pericardial edema (F). (G) Survival curve of taz^Δ10/Δ10 in heterozygote intercrosses from larval to adult stages (shown as % survivors, from two independent experiments). The red dashed line indicates the expected 25% homozygous mutants in accordance with Mendelian segregation. Number of larvae/adults at each stage: 7 dpf (59/228), 15 dpf (37/200), 30 dpf (20/182), 60 dpf (22/216) and 120 dpf (10/174). Black arrow, swim bladder; black arrowhead, pericardium. Scale bar, 500 μm.