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Integration of Protein Interactome Networks with Congenital Heart Disease Variants Reveals Candidate Disease Genes

Gonzalez Teran, B.; Pittman, M.; Felix, F.; Richmond-Buccola, D.; Thomas, R.; Choudhary, K.; Moroni, E.; Colombo, G.; Alexanian, M.; Cole, B.; Samse-Knapp, K.; McGregor, M.; Gifford, C. A.; Huttenhain, R.; Gelb, B. D.; Conklin, B. R.; Black, B. L.; Bruneau, B. G.; Krogan, N. J.; Pollard, K. S.; Srivastava, D.

2021-01-05 genetics Community evaluation
10.1101/2021.01.05.423837 bioRxiv
Show abstract

Congenital heart disease (CHD) is present in 1% of live births, yet identification of causal mutations remains a challenge despite large-scale genomic sequencing efforts. We hypothesized that genetic determinants for CHDs may lie in protein interactomes of GATA4 and TBX5, two transcription factors that cause CHDs. Defining their interactomes in human cardiac progenitors via affinity purification-mass spectrometry and integrating results with genetic data from the Pediatric Cardiac Genomic Consortium revealed an enrichment of de novo variants among proteins that interact with GATA4 or TBX5. A consolidative score that prioritized interactome members based on variant, gene, and proband features identified likely CHD-causing genes, including the epigenetic reader GLYR1. GLYR1 and GATA4 widely co-occupied cardiac developmental genes, resulting in co-activation, and the GLYR1 missense variant associated with CHD disrupted interaction with GATA4. This integrative proteomic and genetic approach provides a framework for prioritizing and interrogating the contribution of genetic variants in disease.

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