GATA-6 regulates semaphorin 3C and is required in cardiac neural crest for cardiovascular morphogenesis
J. Clin. Invest. John J. Lepore, et al. 116:929 doi:10.1172/JCI27363 [Go to this article.]

Figure 1
Conditional targeting of murine GATA-6. (A, top panel) GATA-6 locus containing exons 3 and 4 (rectangles) and the targeting construct containing phosphoglycerate kinase–regulated (PGK-regulated) neo and HSV thymidine kinase (tk) genes. loxP sites (triangles) flank neo and exon 4 encoding the C-terminal zinc finger (Zn) DNA-binding domain. B, BamHI. (Middle panel) Conditionally targeted GATA-6 allele. (Bottom panel) Targeted allele following selective neo deletion. (B, left) Southern blotting (probe A) of targeted ES cells identifies wild-type (11.1 kb) and conditionally targeted (6.8 kb) alleles. (Right) Southern blotting (probe B) of ES cells following Cre transfection identifies wild-type (11.1 kb) and conditionally targeted alleles with neo (6.2 kb) and with selective neo deletion (4.3 kb). (C) Genotyping of wild-type (+/+), heterozygous (+/F), and homozygous (F/F) conditionally targeted mice. (Left) Southern blotting (probe B) identifies wild-type (11.1 kb) and conditionally targeted (4.3 kb) alleles. (Right) PCR using primers PCR-A and PCR-B identifies products corresponding to wild-type (150 bp) and targeted (110 bp) alleles. (D) Analysis of primary GATA-6^F/F aortic SMCs infected with Ad-empty or Ad-Cre. RT-PCR identifies products corresponding to wild-type GATA-6 (373 bp) and GATA-6 following exon 4 deletion (285 bp). Western blotting (WB) identifies full-length (45 kDa) and truncated (41 kDa) GATA-6 proteins. (E) Activation of the GATA-dependent Dab2-LUC reporter. NIH3T3 cells were transiently transfected with 100 ng of the Dab2-LUC reporter and with 0.1–2.0 μg of either pcDNA3–GATA-6 or pcDNA3–GATA-6–Δexon4. The reporter was activated by expression of increasing amounts of wild-type GATA-6, but not by expression of the truncatedATA-6–Δexon4 protein.