NLM DIR Seminar Schedule

Abstract:

Essential genes (EGs) are disproportionately implicated in human disease, yet their disrupted regulation underlying pathology remain poorly understood. We systematically characterize the regulatory architecture of EGs and show that enhancers of EGs are enriched for disease-associated variants from neurodegenerative disorders. While they are as evolutionarily conserved as those associated with non-essential genes (NEGs), they display hallmarks of higher-order regulatory constraint, including distal localization, enrichment in gene deserts, and fewer and weaker cis-eQTLs. eQTLs linked to EGs exhibit greater cellular pleiotropy while exerting smaller effects on gene expression, a pattern mirrored by disease- and age-associated transcriptional changes, where EGs show lower magnitudes of differential expression yet are significantly more likely to be dysregulated. Furthermore, analysis of predicted allele-specific regulatory effects revealed that predicted pathogenic variants within enhancers of EGs are enriched for hallmarks of ageing, such as disruption of the circadian regulator BMAL1, H3K9me3 and other epigenetic features associated with dementias and other aging-associated diseases. In Parkinson’s disease (PD) an ultra-rare PD-associated variant within an enhancer of an EG CNTN1 implicates neuron–glia signaling and Notch-related pathways in amyloid processing and synaptic pruning. Together, our findings suggest that enhancers of EGs define a distinct class of regulatory elements through which age-associated biological processes diverge into pathological trajectories, highlighting essential gene regulatory networks as key mediators of human disease and promising targets for therapeutic intervention.