Life speaks one universal language to activate genes: It speaks many more to silence them
The signals that cells use to switch genes on have remained almost unchanged across 2 billion years of evolution, but the ones used to switch genes off vary dramatically from one branch of life to another, according to a new study from the Center for Genomic Regulation (CRG) in Barcelona.
This groundbreaking study from the Center for Genomic Regulation in Barcelona has revealed that gene regulation remains remarkably consistent across 2 billion years of evolution, while gene silencing mechanisms show considerable variation among different life forms. By conducting the most comprehensive comparative analysis of chromatin regulation in various branches of life, including previously under-researched lineages such as discobans, rhizarians, ichthyosporeans, and cryptomonads, the researchers uncovered critical insights into how genetic information is controlled.
Despite the universality of instructions for activating genes across organisms like humans, sea anemones, and soil amoebas, the methods used to silence genes have evolved separately in different lineages. This diversity in silencing strategies, involving distinct combinations of chemical modifications, highlights an ongoing evolutionary arms race between genomes and parasitic elements like transposable elements.
The findings, published in Nature Genetics, could offer valuable perspectives for medical research on diseases linked to improper gene regulation and contribute to efforts aimed at characterizing life on Earth at the molecular level.
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