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NKX2-5 mutations causative for congenital heart disease retain functionality and are directed to hundreds of targets
Abstract
We take a functional genomics approach to congenital heart disease mechanism. We used DamID to establish a robust set of target genes for NKX2-5 wild type and disease associated NKX2-5 mutations to model loss-of-function in gene regulatory networks. NKX2-5 mutants, including those with a crippled homeodomain, bound hundreds of targets including NKX2-5 wild type targets and a unique set of "off-targets", and retained partial functionality. NKXΔHD, which lacks the homeodomain completely, could heterodimerize with NKX2-5 wild type and its cofactors, including E26 transformation-specific (ETS) family members, through a tyrosine-rich homophilic interaction domain (YRD). Off-targets of NKX2-5 mutants, but not those of an NKX2-5 YRD mutant, showed overrepresentation of ETS binding sites and were occupied by ETS proteins, as determined by DamID. Analysis of kernel transcription factor and ETS targets show that ETS proteins are highly embedded within the cardiac gene regulatory network. Our study reveals binding and activities of NKX2-5 mutations on WT target and off-targets, guided by interactions with their normal cardiac and general cofactors, and suggest a novel type of gain-of-function in congenital heart disease.
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A strong cardiac cis-regulatory signature was observed in Category I with enrichment of binding sites of known master regulators of cardiac development, such as Nkx2-5 and Tbx5.
“A strong cardiac cis-regulatory signature was observed in Category I with the enrichment of binding sites of known master regulators of cardiac development, such as Nkx2-5 and Tbx5, which when mutated account for the genetic causes of CHD (Fig. 2C, i) [2, 25].”
From A cis-regulatory-directed pipeline for the identification of genes involved in cardiac development and disease (2021) · cites this paper as [25]
The Results section on NKX2-5 mutant targets reports enrichment of NKX2-5 binding motifs in the paper’s A- and B-sets, and the Figure 1 caption identifies NKX2-5 mutations associated with congenital heart disease. The cited paper does not report the citing document’s Category I signature or enrichment of Tbx5 binding sites; its analyses concern different target sets. (LLM, conf=0.84)
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GREAT improves functional interpretation of cis-regulatory regions
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Gene Regulatory Networks and the Evolution of Animal Body Plans
Davidson, E. H., & Erwin, D. H. (2006) · Science · doi:10.1126/science.1113832 · Cited by 1,207
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Genome-wide analysis of ETS-family DNA-binding in vitro and in vivo
Wei, G., Badis, G., Berger, M. F., Kivioja, T., Palin, K., Enge, M., Bonke, M., Jolma, A., Varjosalo, M., Gehrke, A. R., et al. (2010) · The EMBO Journal · doi:10.1038/emboj.2010.106 · Cited by 568
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Hollenhorst, P. C., McIntosh, L. P., & Graves, B. J. (2011) · Annual Review of Biochemistry · doi:10.1146/annurev.biochem.79.081507.103945 · Cited by 490
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- Bouveret, R., Waardenberg, A. J., Schonrock, N., Ramialison, M., Doan, T., de Jong, D., Bondue, A., Kaur, G., Mohamed, S., Fonoudi, H., Chen, C.-M., Wouters, M. A., Bhattacharya, S., Plachta, N., Dunwoodie, S. L., Chapman, G., Blanpain, C., & Harvey, R. P.
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- eLife
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- eLife Sciences Publications, Ltd
- Published
- 2015-07-06
- Volume
- 4
- ISSN
- 2050-084X
- PMC
- PMC4548209
- Cited by
- 57
- References
- 6
- Language
- en
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- Funders
- National Health and Medical Research Council (NHMRC) (1061539, 573732, 573703, 1052171, 514900, 1042002, 573705)
- Atlantic Philanthropies (19131)
- British Heart Foundation (CH/09/003)
- Wellcome Trust (083228)
- Schweizerische Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PBEZB-111553)
- Australian Research Council (ARC) (DP0988507, DP120104594, DE120100794)
- European Molecular Biology Organization (EMBO) (1133-2009)
- Human Frontier Science Program (HFSP) (LT00044/2007-L, LT000245/2010-L)
- National Heart Foundation of Australia (1049980)
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