Active DNA demethylation of developmental cis-regulatory regions predates vertebrate origins

Our latest research lead by Ksenia Skvortsova is out in Science Advances. Check out this fun collaborative effort where we unravel the usage of active DNA demethylation pathways in non-vertebrate lineages. We find that invertebrate deuterostomes such as lancelet and se a urchin use TET enzymes for targeted demethylation of regulatory regions associated with developmental genes and show that the complement of identified 5hmC-regulated genes is conserved to vertebrates. This work demonstrates that active 5mC removal from regulatory regions is a common feature of deuterostome embryogenesis suggestive of an unexpected deep conservation of a major gene-regulatory module.